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Publication numberCN1168090 C
Publication typeGrant
Application numberCN 95104774
Publication date22 Sep 2004
Filing date25 Apr 1995
Priority date30 Jun 1994
Also published asCA2148390A1, CA2148390C, CN1124399A, CN1320524C, CN1320526C, CN1661682A, CN1661683A, CN1783219A, CN1783224A, CN100350458C, CN100363985C, DE69507210D1, DE69507210T2, EP0690442A2, EP0690442A3, EP0690442B1, US5689384, US6021013, US6282051, US6320719, US6462904
Publication number95104774.4, CN 1168090 C, CN 1168090C, CN 95104774, CN-C-1168090, CN1168090 C, CN1168090C, CN95104774, CN95104774.4
Inventors托马斯罗伯特奥尔布雷克特, 托马斯・罗伯特・奥尔布雷克特, ・卡尔・巴雷特, 罗伯特卡尔巴雷特, ・霍华德・伊顿, 詹姆斯霍华德伊顿
Applicant国际商业机器公司
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Servo control system and equipment, and its generating method and storage system
CN 1168090 C
Abstract  translated from Chinese
供磁带系统使用的道跟随伺服系统,其中磁伺服模式中包含的转换越过伺服磁道宽度记录在多于一个方位角方向上。 Tape systems for use track follow servo system, which transforms the magnetic servo pattern contains recorded across a servo track width at more than one azimuthal direction. 对越过模式的宽度的任意一点的读而导出的信号的定时随读头移动越过伺服磁道而不断变化。 Timing pattern for any point across the width of the read signal derived from the read head to move with the servo tracks across the constantly changing. 模式由伺服读头读出,伺服读头的宽度相比较于伺服磁道模式而言较小。 Pattern is read by a servo read head, the servo read head width compared to the servo track pattern purposes small. 这种宽伺服模式和窄伺服读头的结合提供了极佳的位置检测线性度和动态范围。 This combination of wide and narrow servo mode servo read head provides an excellent position detection linearity and dynamic range. 在最佳实施方式中,伺服读头与数据磁道相比也较窄,极大地消除了定位检测错误。 In the preferred embodiment, the servo read head is also narrow in comparison with the data track, greatly eliminates the positioning error is detected.
Claims(58)  translated from Chinese
1.一种伺服控制系统,用于将磁头定位到接近于一个移动磁存储介质的表面以读取伺服模式,所述伺服模式记录在存储介质表面的一个或多个道上,该系统包括:一个头组件,它含有一个或多个伺服读头,用于在转换方向上读取存储介质上的伺服模式并产生表示该伺服模式的读头信号;一个伺服译码器,它接收读头信号并对其译码以产生定位信号,该信号指示读头相对于伺服模式的位置;一个平移组件,启动它以将头组件相对于存储介质进行定位;一个伺服控制器,它根据定位信号启动平移组件;伺服译码器中含有对从伺服模式所产生的读头信号进行译码的装置,伺服模式中包括一个磁通转换的循环序列,所述磁通转换沿磁道宽度持续延展并定义伺服模式条使得伺服读头信号随磁头沿磁道宽度移动而变化,条中包含两个或多个方位角方向,使得一个第一方位角方向不和一个第二方位角方向平行,而且伺服译码器中还含有这样的装置,它用来确定伺服模式中多个预定的转换对之间的时间间隔并产生一个速度基本恒定的定位信号,该信号是时间间隔的函数。 1. A servo control system for positioning the head close to a moving surface of a magnetic storage medium for reading a servo pattern, the servo pattern recorded in one or more track storage medium surface, the system comprising: a head assembly comprising one or more servo read head for reading the servo pattern on the storage medium in a transducing direction and generating a servo pattern indicating the read head signal; a servo decoder that receives the read head signal and decodes it to generate a position signal, a signal indicative of the position of the read head relative to the servo pattern; a translation assembly, start it to the head assembly is positioned relative to the storage medium; a servo controller, which according to the positioning signal to start translation assembly ; define servo pattern stripe of the servo decoder contains read head signal produced from the servo pattern decoding means, the servo pattern comprising a cyclic sequence of magnetic flux transitions, the magnetic flux transitions and extend continuously along the track width so that the servo read head signal varies with the magnetic head moving along the track width, strip contains two or more of the azimuthal direction, such that a first and a second azimuthal orientation is not parallel to the azimuthal direction, and the servo decoder further Such a device comprises, which is used to determine the time of the servo pattern of the plurality of predetermined intervals between conversion and generates a substantially constant velocity of the positioning signal which is a function of the time interval.
2.权利要求1中所述的伺服控制系统,其特征在于伺服译码器根据第一时间间隔对第二时间间隔的比产生定位信号,其中第一时间间隔是从第一方位角方向的条到第二方位角方向的条的读头信号时间间隔,第二时间间隔是相同方向的两个条之间的时间间隔。 Servo control system according to claim 1, characterized in that the servo decoder generates a signal for positioning the second time interval than the first time interval according to which the strip from the first time interval is a first azimuthal direction to the time of the read head signal interval second azimuthal direction, the second time interval is the time interval between two strips of the same direction.
3.权利要求1中所述的伺服控制系统,其特征在于信号译码器检测来自与具有第一通量极性的磁通转换相对应的读头中的信号并忽略具有第二通量极性的磁通转换。 Servo control system according to claim 1, characterized in that the signal decoder detects and having a first flux polarity from the magnetic flux transitions corresponding to the read head signal and ignore flux having a second electrode of magnetic flux transitions.
4.权利要求1中所述的伺服控制系统,其特征在于信号译码器将从伺服模式所产生的读头信号进行译码,在所述伺服模式中,条成组排列,组中在第一方向上的多个顺序条之后是在第二方向上的多个顺序条,并且伺服模式中组之间由同步特征分隔。 Servo control system according to claim 1, characterized in that the read head signal from a servo pattern signal decoder for decoding generated in the servo pattern, the strips arranged in groups, the first group After one of the plurality of sequential stripe direction is a plurality of sequential strips in the second direction, and separated by a synchronous servo pattern between groups.
5.一种伺服控制系统,用于将磁头定位到接近于一个移动磁存储介质的表面以读取伺服模式,所述伺服模式记录在存储介质表面的一个或多个道上,该系统包括:一个头组件,它包含一个或多个伺服读头,用于在转换方向上读取存储介质上的伺服模式并产生表示该伺服模式的读头信号;一个伺服译码器,它接收读头信号并对其译码以产生定位信号,该信号指示读头相对于伺服模式的位置;一个平移组件,启动它以将头组件相对于存储介质进行定位;一个伺服控制器,它根据定位信号启动平移组件;伺服译码器中含有对从伺服模式所产生的读头信号进行译码的装置,所述伺服模式中包括一个磁通转换的循环序列,所述磁通转换沿磁道宽度持续延展并定义伺服模式条使得伺服读头信号随伺服读头沿磁道宽度移动而变化,条中包括两个或多个方位角方向,使得一个第一方位角方向不和一个第二方位角方向平行,从而伺服译码器中用于译码的装置对表示伺服模式的读头信号进行译码,在所述伺服模式中,条成组排列,组中在第一方位角方向上的多个顺序条之后是在第二方位角方向上的多个顺序条。 A servo control system for positioning the head close to a moving surface of a magnetic storage medium for reading a servo pattern, the servo pattern recorded in one or more track storage medium surface, the system comprising: a head assembly, which comprises one or more servo read head for reading the servo pattern on the storage medium in a transducing direction and generating a servo pattern indicating the read head signal; a servo decoder that receives the read head signal and decodes it to generate a position signal, a signal indicative of the position of the read head relative to the servo pattern; a translation assembly, start it to the head assembly is positioned relative to the storage medium; a servo controller, which according to the positioning signal to start translation assembly ; servo decoder contain read head signal produced from the servo pattern decoding means, said servo pattern comprising a cyclic sequence of magnetic flux transitions, along the track width of the magnetic flux transitions continuously extend and define servo pattern stripes such that the servo read head signal varies with the servo read head to move along the track width, bar comprises two or more azimuthal direction, such that a first and a second azimuthal orientation is not parallel to the azimuthal direction, whereby the servo translation decoder means for decoding the servo pattern indicating a read head signal decoding, in the servo pattern, the strips arranged in groups, a plurality of sequential stripe after group in the azimuthal direction in a first multiple sequential Article azimuthal direction.
6.权利要求5中所述的伺服控制系统,其特征在于所述伺服模式中组之间由同步特征分隔,同步特征可由伺服译码器检测出。 In the servo control system according to claim 5, characterized in that between the servo pattern set by the synchronous separator, characterized by a synchronous servo decoder detected.
7.权利要求6中所述的伺服控制系统,其特征在于伺服模式的同步特征中包含除了含有伺服控制信息外的其它信息。 Servo control system according to claim 6, characterized in that the synchronous servo pattern contains other information in addition to the servo control information contained outside.
8.权利要求6中所述的伺服控制系统,其特征在于伺服模式的同步特征中包含在一个或多个极性上没有转换的无转换空间,并且其在转换方向上的最小长度超过一组相同方位角方向的条中该极性的连续转换之间在转换方向上的最大长度。 Servo control system according to claim 6, characterized in that the synchronous servo pattern contains no transformation space on one or more of the polarity is not converted, and the minimum length in the transducing direction exceeds a set The maximum length in the transducing direction between the stripe in the same azimuthal direction continuously converting the polarity.
9.权利要求8中所述的伺服控制系统,其特征在于循环转换序列的每个模式周期包括许多组的条,每组包含一单一方位角方向的条,并且在一个周期内有一组或多组中所含条数与其它组中所含条数不同。 Servo control system according to claim 8, characterized in that the cycloconverter sequence each pattern cycle comprising a plurality of sets of strips, each strip containing a single azimuthal direction, and in a cycle has one or more group contained the number contained in the different number of other groups.
10.权利要求9中所述的伺服控制系统,其特征在于伺服译码器中用于译码的装置通过对在条的先前组中所检测出的条数进行计数来识别一个模式周期中的各个无转换空间。 Servo control system according to claim 9, characterized in that the servo decoder means for decoding by a group of several previously detected in the strip is counted to identify a pattern cycle No conversion of each space.
11.权利要求9中所述的伺服控制系统,其特征在于循环转换序列的每个模式周期中包括一个有四个在第一方位角方向上的条的组,后接一个有四个在第二方位角方向上的条的组,后接一个有五个在第一方位角方向上的条的组,再接一个有五个在第二方位角方向上的条的组,每组之后出现一个无转换空间。 Servo control system according to claim 9, characterized in that the cycloconverter sequence each pattern comprises a four-cycle in the azimuthal direction of the first group, followed by a four-in section Two groups of the azimuthal direction, followed by a five in the first azimuthal direction of the group, followed by a second, five in the azimuthal direction of the group, appeared after each set No space for a conversion.
12.权利要求5中所述的伺服控制系统,其特征在于存储介质上一个或更多组相邻的伺服磁道形成一个或多个伺服磁道带。 In the servo control system of claim 5, wherein the storage medium one or more groups of adjacent servo tracks form one or more servo track band.
13.权利要求12中所述的伺服控制系统,其特征在于一个带内的相邻伺服磁道是相同的。 In the servo control system of claim 12, wherein adjacent servo tracks within a band are identical.
14.权利要求12中所述的伺服控制系统,其特征在于存储介质一个带内的相邻伺服磁道中所包含的模式是它们相互之间在转换方向上的一条线上的反射,使得伺服磁道带中的所有转换沿带的宽度都连续。 In the servo control system of claim 12, wherein adjacent servo tracks with a storage medium contained within the reflection pattern is a line between each other in the direction of conversion, so that the servo track All conversion along with the band width are continuous.
15.权利要求14中所述的伺服控制系统,其特征在于存储介质上的两个道形成一个伺服带,该带在转换方向上对带的中心对称,每个道中包括一个循环序列,其周期是一个有四个在第一方位角方向上的线性条的组,后接一个有四个在第二方位角方向上的线性条的组,后接一个有五个在第一方位角方向上的线性条的组,再接一个有五个在第二方位角方向上的线性条的组,每组之后出现一个无转换空间;第一和第二方位角方向包括对带的中心对称的补角,使得带包含具有四个和五个相反方向的人字形的顺序组,组之间由无转换空间分隔。 In the servo control system of claim 14, characterized in that the two channels on the storage medium to form a servo band, the tape in the transducing direction of the central zone of symmetry, each channel includes a loop sequence having a period is a four azimuthal direction in the first group of linear strips, followed by a four azimuthal direction in the second group of linear strips, followed by a five in a first azimuthal direction linear strip group, followed by a five in the second azimuthal direction of a linear strip group, each group appear after converting a free space; first and second azimuthal direction including center with symmetrical complement angle, so that the belt contains a sequence of groups of people shaped with four and five in the opposite direction, separated by a space no conversion between the groups.
16.权利要求5中所述的伺服控制系统,其特征在于信号译码器中用于译码的装置检测来自于与具有第一通量极性的磁通转换相对应的伺服读头中的信号,并忽略具有第二通量极性的磁通转换。 In the servo control system of claim 5, characterized in that the means for detecting the signal decoder for decoding from a flux having a first polarity corresponding to the magnetic flux transitions in servo read head signal, having a second flux polarity and ignores magnetic flux transitions.
17.权利要求5中所述的伺服控制系统,其特征在于存储介质中包含具有磁层的带基,伺服模式记录于磁层之中。 5. The servo control system according to claim 17, characterized in that the storage medium contains a tape substrate, a magnetic layer having a servo pattern recorded in the magnetic layer being.
18.一种伺服控制系统,用于将磁头定位到接近于一个移动磁存储介质的表面以读取伺服模式,所述伺服模式记录在存储介质表面的至少一个道上,该系统包括:一个头组件,它包含一个或多个伺服读头,用于在转换方向上读取存储介质上的伺服模式并产生表示该伺服模式的读头信号;一个伺服译码器,它接收读头信号并对其译码以产生定位信号,该信号指示读头相对于伺服模式的位置;一个平移组件,启动它以将头组件相对于存储介质进行定位;一个伺服控制器,它根据定位信号启动平移组件;伺服译码器中含有对从伺服模式所产生的读头信号进行译码的装置,所述伺服模式中包括一个磁通转换的环序列,所述磁通转换沿磁道宽度持续延展并定义伺服模式条使得伺服读头信号随伺服读头沿磁道宽度移动而变化,条中包括两个或多个方位角方向,使得一个第一方位角方向不和一个第二方位角方向平行,并且条成组排列,组中包含多个顺序子组,每个子组中含有在多于一个方位角方向上的条,组之间由同步特征分隔,所述同步特征可由伺服译码器检测出。 18. A servo control system for positioning the head close to a moving surface of a magnetic storage medium for reading a servo pattern, the servo pattern recorded in at least one track storage medium surface, the system comprising: a head assembly It contains one or more servo read head for reading the servo pattern on the storage medium in a transducing direction and generating a servo pattern indicating the read head signal; a servo decoder that receives the read head signal and its decoding to produce a positioning signal which indicates the position of the read head relative to the servo pattern; a translation assembly, start it to the head assembly is positioned relative to the storage medium; a servo controller, which according to the positioning signal to start translation assembly; Servo decoder contain servo pattern read head signal produced from the decoding means, said servo pattern comprising a cyclic sequence of magnetic flux transitions, along the track width of the magnetic flux transitions continuously extend and define servo pattern stripes so that the servo read head signal varies with the servo read head to move along the track width, bar comprises two or more azimuthal direction, such that a first and a second azimuthal orientation is not parallel to the azimuthal direction, and the strips arranged in groups , a group comprising a plurality of sequential subgroups, each subgroup containing more than one strip in the azimuthal direction, between the groups are separated by synchronization features, the synchronous servo decoder can be detected.
19.权利要求18中所述的伺服控制系统,其特征在于伺服模式的条的子组中包含成对的条,每对条中包含一条在第一方位角方向上的条和一条在第二方位角方向上的条。 Servo control system according to claim 18, characterized in that the subset of the servo pattern contains pairs of strips, each pair of strips comprises a first azimuthal direction in the strip and in a second Article azimuthal direction.
20.权利要求18中所述的伺服控制系统,其特征在于伺服模式的同步特征中包含在一个或多个极性上没有转换的无转换空间,并且其在转换方向上的最小长度超过了一组相同方位角方向的条中该极性的连续转换之间在转换方向上的最大长度。 Servo control system according to claim 18 20., characterized in that the synchronous servo pattern contains no transformation space on one or more of the polarity is not converted, and the minimum length in the transducing direction exceeds a The maximum length of the conversion in the same direction between the groups in the azimuthal direction of the strip continuous conversion of the polarity.
21.权利要求18中所述的伺服控制系统,其特征在于伺服模式的同步特征中除了含有伺服控制信息外,还含有其它信息。 Servo control system according to claim 18 21., characterized in that the synchronous servo pattern of the servo control information contained in addition, also contain other information.
22.权利要求18中所述的伺服控制系统,其特征在于存储介质上一个或更多组的相邻的伺服磁道形成一个或多个伺服磁道条。 Servo control system according to claim 18 22., characterized in that one or more sets of adjacent servo tracks form one or more strips on the storage medium servo track.
23.权利要求22中所述的伺服控制系统,其特征在于一个带内相邻的伺服磁道是相同的。 Servo control system according to claim 22, characterized in that a band adjacent servo tracks are the same.
24.权利要求22中所述的伺服控制系统,其特征在于一个带内的相邻伺服磁道中所包含的模式是它们相互之间在转换方向上的一条线上的反射,使得伺服磁道带中的所有转换沿带的宽度都连续。 Servo control system according to claim 22 24., wherein adjacent servo tracks within a band included in the pattern is reflected in a line between them each other in the direction of conversion, so that the servo track band All transitions are continuous along the width of the belt.
25.权利要求18中所述的伺服控制系统,其特征在于信号译码器中用于译码的装置检测来自于与具有第一通量极性的磁通转换相对应的伺服读头中的信号,并忽略具有第二通量极性的磁通转换。 Servo control system according to claim 18 25., characterized in that the means for detecting the signal decoder for decoding from the corresponding servo read head having a first flux polarity of magnetic flux transitions signal, having a second flux polarity and ignores magnetic flux transitions.
26.权利要求18中所述的伺服控制系统,其特征在于存储介质中包含具有磁层的带基,伺服模式记录于磁层之中。 Servo control system according to claim 18 26., characterized in that the storage medium contains a tape substrate, a magnetic layer having a servo pattern recorded in the magnetic layer being.
27.一种伺服模式写设备,它用于在磁存储介质上生成伺服模式,该设备包括:一个多间隙伺服写头,它产生磁通量以生成伺服模式,伺服模式包括一个磁通转换的循环序列,磁通转换沿转换方向记录在存储介质的道上,它沿伺服磁道的宽度持续延展并定义伺服模式条,使得由伺服读头产生的伺服读头信号随伺服读头沿伺服磁道的宽度移动而变化,该伺服模式条包含两个或多个方位角方向,使得一个第一方位角方向不与一个第二方位角方向平行,以及;一个电流脉冲发生器,它间歇性地以一预定极性对伺服写头激磁以在存储介质上自动记录磁通模式的序列并生成伺服模式。 27. A servo pattern writing apparatus, which is used to generate the servo pattern on a magnetic storage medium, the apparatus comprising: a multi-gap servo write head, which generates magnetic flux to generate the servo pattern, the servo pattern comprising a cyclic sequence of magnetic flux transitions , change the direction of flux transitions recorded on the track of the storage medium, and it continued to extend along the width of the defined servo pattern stripe servo track, so that the servo read head signal is generated by the servo read head with servo read head along the width of the servo track movement changes, the servo pattern comprising two or more strips the azimuthal direction, such that a first azimuth angle and a second direction not parallel to the azimuthal direction, and; a current pulse generator that intermittently at a predetermined polarity excitation of the servo write head to automatically record on the storage medium and generates the magnetic flux pattern of servo pattern sequences.
28.权利要求27中所述的伺服模式写设备,其特征在于伺服写头上的多个间隙位于每个记录的伺服磁道上的多个方位角方向上,使得任两个间隙之间在转换方向上的最小间距超过任意间隙在转换方向上的宽度。 As described in claim 27 28. A servo pattern writing apparatus, wherein a plurality of servo write head gaps are located on a plurality of azimuth directions servo track on each record, so that conversion between any two gaps minimum pitch direction than any gap width in the direction of conversion.
29.权利要求27中所述的伺服模式写设备,其特征在于多间隙伺服写头包括:一个磁导芯,它具有介质支撑轮廓表面,表面具有多个写间隙;一个磁导薄膜层,它覆盖于介质支撑轮廓表面上,除了薄膜层上那些定义伺服模式的写间隙,薄膜层跨过芯的间隙;以及一个电导线圈,它缠绕于磁导芯周围。 As described in claim 27 29. A servo pattern writing apparatus, wherein the multi-gap servo write head comprising: a magnetically conducting core having a media support surface contour, the surface having a plurality of write gap; a magnetic conductive thin film layer, it Media coverage on the support surface contour, in addition to those definitions write gap servo pattern on the thin film layer, the core of the gap across the thin film layer; and a conductance coil, which is wound around the core in permeability.
30.权利要求27中所述的伺服模式写设备,其特征在于循环转换序列的每个周期包括多个顺序条,每组中在第一方向上的多个顺序条之后是在第二方向上的多个顺序条,并且在伺服模式中组之间由同步特征分隔。 After 27 described in claim 30. The servo pattern writing apparatus, wherein the conversion sequence of each cycle period comprises a plurality of sequential strips, each strip in a plurality of sequentially in a first direction in the second direction multiple sequential strips and separated by synchronization features between groups in the servo mode.
31.权利要求30中所述的伺服模式写设备,其特征在于循环转换序列的每个周期包括许多组的条,每组包含一单一方位角方向的条,并且在一个周期内至少有一组中所含条数与其它组中所含条数不同。 As described in claim 30 31. A servo pattern writing apparatus, wherein the conversion sequence of each cycle period including a plurality of sets of strips, each strip containing a single azimuthal direction, and within a period of at least one group contains the number of the other group contained several different pieces.
32.权利要求31中所述的伺服模式写设备,其特征在于循环转换序列的每个模式周期包括一个有4个在第一方位角方向上的条的组,后接一个有四个在第二方位角方向上的条的组,后接一个有五个在第一方位角方向上的条的组,再接一个有五个在第二方位角方向上的条的组,每组之后出现一个无转换空间。 As described in claim 31 32. A servo pattern writing apparatus, wherein the conversion sequence of each pattern cycle comprising a four-cycle in a first azimuthal direction of the group, followed by a four-in section Two groups of the azimuthal direction, followed by a five in the first azimuthal direction of the group, followed by a second, five in the azimuthal direction of the group, appeared after each set No space for a conversion.
33.一种数据存储系统,包括:一个磁存储介质,它在一个或多个伺服磁道上记录有伺服模式;驱动器装置,用于使磁存储介质相对于磁头组件移动;一个磁头组件,它移动到充分接近于移动磁存储介质的表面以读取记录在存储介质表面上的伺服模式并产生伺服读头信号,该磁头组件中含有一个或多个数据头用以读和写数据,以及一个或多个伺服读头用于读取存储介质道上的伺服信息;一个伺服控制系统,它用于将磁头组件定位到接近于移动磁存储介质的表面以读取伺服模式,所述伺服模式记录在存储介质表面的一个或多个道上,一个伺服译码器,它接收伺服读头信号并对其译码以产生定位信号,所述定位信号指示伺服读头相对于伺服模式的位置,一个平移组件,启动它以将头组件相对于存储介质进行定位,一个伺服控制器,它根据定位信号启动平移组件,伺服译码器中含有对从伺服模式所产生的伺服读头信号进行译码的装置,所述伺服模式中包括一个磁通转换的循环序列,所述磁通转换沿磁道宽度持续延展并定义伺服模式条,使得伺服读头信号随磁头沿磁道宽度移动而变化,条中包含两个或多个方位角方向,使得一个第一方位角方向不和一个第二方位角方向平行,并且条成组排列,组中在第一方位角方向上的多个顺序条之后是在第二方位角方向上的多个顺序条。 33. A data storage system, comprising: a magnetic storage medium, which is recorded on the servo track has one or more servo pattern; drive means for moving the magnetic storage medium relative to the magnetic head assembly is moved; a head assembly, it moves sufficiently close to the surface of a moving magnetic storage medium to read recorded on the storage medium surface servo pattern and generating a servo read head signal, the head assembly containing one or more data heads for reading and writing data, as well as one or a plurality of servo read head for reading servo information storage medium track; a servo control system, which is used to move the head assembly is positioned close to the surface of the magnetic storage medium to read the servo pattern, the servo pattern recorded in the storage one or more of the track surface of the medium, a servo decoder that receives the servo read head signal and decodes it to generate a positioning signal, the positioning signal indicating the position of the servo read head relative to the servo pattern, a translation assembly, It starts with the head assembly is positioned relative to the storage medium, a servo controller that initiates translation assembly, the servo decoder contains the servo read head signal produced from the servo pattern decoding apparatus according to the positioning signal, the said servo pattern comprising a cyclic sequence of magnetic flux transitions, along the track width of the magnetic flux transitions continuously extend and define servo pattern stripes such that the servo read head signal varies with the magnetic head moving along the track width, strip contains two or more azimuth direction, such that a first and a second azimuthal direction that is not parallel to the azimuthal direction, and the strips arranged in groups, after a plurality of strips in a first order in the azimuthal direction of the group in the second azimuthal direction multiple sequential bar.
34.权利要求33中所述的数据存储系统,其特征在于在单一方向上的顺序条组由同步特征与在其它方向上的顺序条组分隔开。 Data storage system according to claim 34. 33, characterized in that in a single direction of sequential stripe group is spaced in the other direction of the strip component consists of the sequence synchronous.
35.权利要求34中所述的数据存储系统,其特征在于同步特征中包含在一个或多个极性上没有转换的无转换空间,其在转换方向上的最小长度超过了一组相同方位角方向的条中该极性上连续转换之间在转换方向上的最大长度。 Data storage system according to claim 35. 34, wherein the synchronization features contain no transformation space on one or more of the polarity is not converted, the minimum length in the transducing direction exceeds the same azimuth angle as a group direction of the strip to convert the maximum length in the continuous conversion between the direction of the polarity.
36.权利要求35中所述的数据存储系统,其特征在于转换循环序列的每个模式周期包括许多组的条,每组包含单一方位角方向的条,并且在一个周期内有一组或多组中所含条数与其它组中所含条数不同。 Data storage system according to claim 36. 35, characterized in that each pattern cycle conversion cycle sequence includes a plurality of sets of strips, each strip containing a single azimuthal direction, and in a cycle has one or more groups the number contained in the other group contained several different pieces.
37.权利要求36中所述的数据存储系统,其特征在于伺服译码器通过对在条的先前组中所检测出的条数进行计数来识别一个模式中的各个无转换空间。 Data storage system according to claim 37. 36, characterized in that the servo decoder previously by several groups in the detected strip is counted to identify a pattern in the respective non-transformation space.
38.权利要36中所述的数据存储系统,其特征在于转换循环序列的每个模式周期中包括一个有四个在第一方位角方向上的条的组,后接一个有四个在第二方位角方向上的条的组,后接一个有五个在第一方位角方向上的条的组,再接一个有五个在第二方位角方向上的条的组,每组之后出现一个无转换空间。 38. The data storage system of claims 36, wherein, wherein each mode conversion cycle period comprising a sequence of four in the azimuthal direction of the first group, followed by a four-in section Two groups of the azimuthal direction, followed by a five in the first azimuthal direction of the group, followed by a second, five in the azimuthal direction of the group, appeared after each set No space for a conversion.
39.权利要求36中所述的数据存储系统,其特征在于同步特征中包含除伺服控制信息外的其它信息。 Data storage system according to claim 39. 36, wherein the synchronization features contain information other than servo control information outside.
40.权利要求33中所述的数据存储系统,其特征在于一个或更多组的相邻伺服磁道形成一个或多个伺服磁道带。 Data storage system according to claim 40. 33, characterized in that one or more adjacent servo tracks form one or more groups of servo track band.
41.权利要求40中所述的数据存储系统,其特征在于一个带内的相邻伺服磁道是相同的。 Data storage system according to claim 41. 40, wherein adjacent servo tracks within a band are identical.
42.权利要求40中所述的数据存储系统,其特征在于一个带内的相邻伺服磁道中所包含的模式是它们相互之间在转换方向上的一条线上的反射,使得伺服磁道带中的所有转换沿带的宽度都连续 Data storage system according to claim 42. 40, wherein adjacent servo tracks within a band included in the pattern is reflected in a line between them each other in the direction of conversion, so that the servo track band All transitions are continuous along the width of the tape
43.权利要求42中所述的数据存储系统,其特征在于两个道形成一个伺服带,该带在转换方向上对带的中心对称,每个道包括一个循环序列,其周期是一个有四个在第一方位角方向上的线性条的组,后接一个有四个在第二方位角方向上的线性条的组,后接一个有五个在第一方位角方向上的线性条的组,再接一个有五个在第二方位角方向上的线性条的组,每组之后出现一个无转换空间;并且第一和第二方位角方向中包含对带的中心对称的补角,使得带包含有四个和五个相反方向的人字形的顺序组,组间由无转换空间分隔。 Data storage system according to claim 43. 42, characterized in that the two channels to form a servo band, the tape in the transducing direction symmetrical to the center band, each channel including a cyclic sequence, which is a four-cycle an azimuthal direction in the first group of linear strips, followed by a set of four linear strips in a second azimuthal direction, followed by a five pieces in a first linear direction of azimuthal group, followed by a group of five linear strips in the second azimuthal direction, each conversion after the emergence of a free space; and the first and second azimuthal direction of the central zone contains supplementary angle symmetrical, so that the belt contains four and five in the opposite direction herringbone order group, separated by a space no conversion between the two groups.
44.权利要求33中所述的数据存储系统,其特征在于信号译码器检测来自与具有第一通量极性的磁通转换相对应的伺服读头中的信号,并忽略具有第二通量极性的磁通转换。 Data storage system according to claim 44. 33, characterized in that the signal decoder detects and having a first flux polarity from the magnetic flux transitions corresponding to the servo read head signal, and having a second through ignoring amount of polar magnetic flux transitions.
45.权利要求33中所述的数据存储系统,其特征在于系统中还进一步含有向存储介质写伺服模式的装置。 Data storage system according to claim 45. 33, characterized in that the system further comprises a servo pattern written to the storage medium means.
46.一种数据存储系统,包括:一个磁存储介质,它在一个或多个伺服磁道上记录有伺服模式;驱动器装置,用于使磁存储介质相对于磁头组件移动;一个磁头组件,它移动到充分接近于移动磁存储介质的表面以读取记录在存储介质表面上的伺服模式并产生伺服读头信号,该磁头组件中含有一个或多个数据头用以读和写数据,并且含有一个或多个伺服读头用于读取存储介质道上的伺服信息;一个伺服控制系统,它用于将磁头组件定位到接近于移动磁存储介质的表面以读取伺服模式,所述伺服模式记录在存储介质表面的一个或多个道上,一个伺服译码器,它接收伺服读头信号并对其译码以产生定位信号,所述定位信号指示读头相对于伺服模式的位置,一个平移组件,启动它以将头组件相对于存储介质进行定位,一个伺服控制器,它根据定位信号启动平移组件;伺服译码器中含有对从伺服模式所产生的伺服读头信号进行译码的装置,伺服模式中包括一个磁通转换的循环序列,所述磁通转换沿磁道宽度持续延展并定义伺服模式条,使得伺服读头信号随磁头沿磁道宽度移动而变化,条中包含两个或多个方位角,使得一个第一方位角方向不和一个第二方位角方向平行,并且条成组排列,组中包含多个顺序子组,每个子组中含有多于一个方位角方向的条,组之间由同步特征分隔。 46. A data storage system, comprising: a magnetic storage medium, which is recorded on the servo track has one or more servo pattern; drive means for moving the magnetic storage medium relative to the magnetic head assembly is moved; a head assembly, it moves sufficiently close to the surface of a moving magnetic storage medium to read recorded on the storage medium surface servo pattern and generating a servo read head signal, the head assembly containing one or more data heads for reading and writing data, and contains a or multiple servo read head for reading servo information storage medium track; a servo control system, which is used to move the head assembly is positioned close to the surface of a magnetic storage medium to read the servo pattern, the servo pattern recorded in one or more tracks of the storage medium surface, a servo decoder that receives the servo read head signal and decodes it to generate a positioning signal, the positioning signal indicating the position of the read head relative to the servo pattern, a translation assembly, It starts with the head assembly is positioned relative to the storage medium, a servo controller, which according to the positioning signal to start translation assembly; servo decoder contains the servo read head signal produced from the servo pattern decoding means, servo mode includes a cyclic sequence of magnetic flux transitions, along the track width of the magnetic flux transitions continuously extend and define servo pattern stripes such that the servo read head signal varies with the magnetic head moving along the track width, strip contains two or more orientations angle, so that a first and a second azimuthal orientation is not parallel to the azimuthal direction, and the strips arranged in groups, a group comprising a plurality of sequential subgroups, each subgroup contains more than one azimuthal direction of strip, the group of separated by synchronization among features.
47.一种数据存储系统,包括:一个磁存储介质,它在一个或多个伺服磁道上记录有伺服模式;驱动器装置,用于使磁存储介质相对于磁头组件移动;一个磁头组件,它移动到充分接近于移动磁存储介质的表面以读取记录在存储介质表面上的伺服模式并产生伺服读头信号,该磁头组件中含有一个或多个数据头用以读和写数据,并且含有一个或多个伺服读头用于读取磁存储介质道上的伺服信息;一个伺服控制系统,它用于将磁头组件定位到接近于移动磁存储介质的表面以读取伺服模式,所述伺服模式记录在存储介质表面的一个或多个道上,一个伺服译码器,它接收伺服读头信号并对其译码以产生定位信号指示伺服读头相对于伺服模式的位置,一个平移组件,启动它以将头组件相对于存储介质进行定位,一个伺服控制器,它根据定位信号启动平移组件;其中伺服译码器中含有对从伺服模式所产生的读头信号进行译码的装置,所述伺服模式中包括一个磁通转换的循环序列,所述磁通转换沿磁道宽度持续延展并定义伺服模式条,使得伺服读头信号随磁头沿磁道宽度移动而变化,条中包含两个或多个方位角方向,使得一个第一方位角方向不和一个第二方位角方向平行,并且伺服译码器确定伺服模式中多个预定的转换对之间的时间间隔并产生一个基本上速度恒定的定位信号,该信号是时间间隔的函数。 47. A data storage system, comprising: a magnetic storage medium, which is recorded on the servo track has one or more servo pattern; drive means for moving the magnetic storage medium relative to the magnetic head assembly is moved; a head assembly, it moves sufficiently close to the surface of a moving magnetic storage medium to read recorded on the storage medium surface servo pattern and generating a servo read head signal, the head assembly containing one or more data heads for reading and writing data, and contains a or multiple servo read head for reading a magnetic track servo information storage medium; a servo control system, which is used to move the head assembly is positioned close to the surface of the magnetic storage medium to read the servo pattern, the servo pattern recording In a storage medium surface or a plurality of tracks, a servo decoder that receives the servo read head signal and decodes it to generate a position signal indicating the servo read head relative to the servo pattern position, a translation assembly, start it The head assembly is positioned relative to the storage medium, a servo controller, which according to the positioning signal to start translation assembly; wherein the servo decoder contain read head signal produced from the servo pattern decoding means, said servo pattern includes a cyclic sequence of magnetic flux transitions, along the track width of the magnetic flux transitions continuously extend and define servo pattern stripes such that the servo read head signal varies with the magnetic head moving along the track width, strip contains two or more azimuth direction so that a first and a second azimuthal direction that is not parallel to the azimuthal direction, and the servo decoder to determine the time in a plurality of predetermined servo pattern intervals between conversion and for producing a substantially constant speed positioning signal, This signal is a function of the time interval.
48.权利要求47中所述的数据存储系统,其特征在于伺服译码器中用于译码的装置根据第一时间间隔对第二时间间隔的比例产生定位信号,其中第一时间间隔是从第一方位角方向的条到第二方位角方向的条的读头信号时间间隔,第二时间间隔是相同方向的两个条之间的时间间隔。 Data storage system according to claim 48. 47, wherein the servo decoder means for decoding the location signal for generating a second time interval based on the ratio of a first time interval, wherein the first time interval is from Article first azimuth angle direction to the second azimuthal direction of the read head signal time interval, the second time interval is the time between two strips in the same direction of the interval.
49.权利要求47中所述的数据存储系统,其特征在于信号译码器中用于译码的装置检测来自于与具有第一通量极性的磁通转换相对应的读头中的信号,并忽略具有第二通量极性的磁通转换。 Data storage system according to claim 49. 47, characterized in that the signal decoder means for decoding detected from a flux having a first polarity corresponding to magnetic flux transitions in the signal read head , having a second flux polarity and ignores magnetic flux transitions.
50.一种在磁存储介质上生成伺服模式的方法,该伺服模式包含一个沿转换方向记录于存储介质道上的磁通转换的循环序列,所述磁通转换沿磁道宽度持续延展并定义伺服模式条,条中包含两个或多个方位角方向,使得一个第一方位角方向不和一个第二方位角方向平行,并且条成组排列,组中包含多个在第一方位角方向上的隔开的顺序条,后接多个在第二方位角方向上的隔开的顺序条,该方法包括如下步骤:在转换方向上相对于多间隙伺服写头移动磁存储介质,伺服写头上有前导间隙和尾部间隙,所述前导间隙和尾部间隙在转换方向上隔开并可被提供电流脉冲以产生磁通转换,并对每个电流脉冲在伺服磁道上记录第一方位角方向的一个或多个伺服模式条和第二方位角方向的一个或多个伺服模式条,对多间隙伺服写头提供多组重复的预定极性的电流脉冲,所述电流脉冲组之间通过一延迟时间间隔在时间上相互隔开,组内重复脉冲的定时使得在该组的最后一次电流脉冲中由尾部间隙记录的条完全处于在该组的第一次电流脉冲中由前导间隙和尾部间隙所记录的条之间,并且延迟间隔足够长使得一组脉冲写下的所有条完全在前一组电流脉冲所写的条之外;并且重复提供电流脉冲的步骤直至记录在存储介质上的条组成伺服模式。 50. A method for generating a servo pattern on a magnetic storage medium, the servo pattern comprising a shift direction along the track of the recording medium in the storage loop sequence of magnetic flux transitions, along the track width of the magnetic flux transitions continuously extend and define servo pattern , Article contains two or more azimuthal direction, such that a first and a second azimuthal direction that is not parallel to the azimuthal direction, and the strips arranged in groups, a group comprising a plurality of the first azimuthal direction spaced sequential stripe, followed by a second azimuthal direction in the plurality of spaced strips of the order, the method comprising the steps of: converting direction with respect to multi-gap servo write head magnetic storage medium, the servo write head with leading and trailing clearance gap, the leading and trailing gap in the conversion gap spaced current pulses may be provided to generate magnetic flux transitions, and each current pulse recorded on a first azimuth direction of a servo track or between a plurality of servo pattern stripe and a second azimuthal direction or a plurality of servo pattern stripes, the multi-gap servo write head to provide a plurality of sets of repeated current pulses of a predetermined polarity, the current pulse groups by a delay time intervals spaced apart in time, the timing of repeated pulses within a group in the group such that strips the last current pulse recorded by the trailing gap completely recorded by the leading gap and the trailing gap during the first current pulse of the group between the strips, and the delay interval long enough so that a group of pulses for all written entirely in the first set of current pulses outside a written article; and repeating the step of providing current pulses until the recording strip on a storage medium consisting of a servo mode.
51.权利要求50中所述的生成伺服模式的方法,其特征在于在移动步骤中条在存储介质上沿转换方向的位置是通过以预定速率在转换方向上移动磁存储介质来控制的,并且在提供电流脉冲步骤中,条的位置是通过以固定时间间隔提供重复电流脉冲来控制的。 The method of generating the servo pattern 51. The claim 50, characterized in that the moving step strip on the storage medium along the transducing direction at a predetermined position by the conversion rate in the direction to control the movement of the magnetic storage medium, and In the step of providing current pulses, the position of the through repeated at regular intervals to provide a current pulse controlled.
52.权利要求50中所述的生成伺服模式的方法,其特征在于在移动步骤中条在存储介质上沿转换方向的位置是通过反复测量磁存储介质的速率来控制的,并且在提供电流脉冲步骤中,通过在从速率测量导出的时间上提供重复的电流脉冲以获得所需的条间隔。 The method of generating the servo pattern 52. The claim 50, characterized in that the moving step strip on the storage medium along the transducing direction position by repeatedly measuring the magnetic storage medium rate control, and to provide a current pulse step, by providing current pulses repeating at a rate derived from the measurement of the time to obtain the desired stripe spacing.
53.权利要求50中所述的生成伺服模式的方法,其特征在于提供重复电流脉冲的步骤中包含在每个伺服模式组后建立一个无转换空闲间隔的步骤,这是通过让延迟间隔足够长、并且让多间隙伺服写头上的间隙之间的间距足够长使任意两个伺服模式组之间在转换方向上的最小间距超过任意两个伺服模式条之间在转换方向上的间距而完成的。 The method of generating the servo pattern 53. The claim 50, wherein the step of providing current pulses contains repeating the step of establishing a non-converted idle interval after each servo pattern group, this is by having the delay interval is sufficiently long , and the pitch so that the multi-gap servo write head gap is sufficiently long so that the minimum distance between any two servo pattern in the transducing direction exceeds the spacing between the groups in the transducing direction between any two servo pattern stripe is completed a.
54.权利要求53中所述的生成伺服模式的方法,其特征在于重复提供脉冲电流组的步骤,使得所记录的转换的循环序列的每个模式周期中包含许多组的条,每组包含单一方位角方向的条并且在一个周期内有一组或多组中所含条数与其它组中所含条数不同。 Generating servo pattern 54. The method according to claim 53, wherein the step of providing a repeating pulse current group, so that each pattern cycle sequence recorded in the converted article comprising a plurality of groups, each consisting of a single Article azimuthal direction and within a period of one or more groups have the number contained in the strip contain different number of the other groups.
55.权利要求54中所述的生成伺服模式的方法,其特征在于重复提供脉冲电流组的步骤,使得所记录的转换的循环序列的每个模式周期中包括一个有四个在第一方位角方向上的条的组,后接一个有四个在第二方位角方向上的条的组,后接一个有五个在第一方位角方向上的条的组,再接一个有五个在第二方位角方向上的条的组,每组之后出现一个无转换空间。 Servo pattern generation method according to 54 claim 55., wherein the step of providing a repeating pulse current group, the cyclic sequence of transitions recorded each pattern cycle comprises a first azimuth four direction of the group, followed by a four in the second azimuthal direction of the group, followed by a five in the first azimuthal direction of the group, followed by a five in The second group of the azimuthal direction, no conversion occurs after each set of a space.
56.一种在磁存储介质上生成伺服模式的方法,该伺服模式中包含一个沿转换方向记录在磁存储介质的道上的磁通转换的循环序列,所述磁通转换沿伺服磁道宽度持续延展并定义伺服模式条,条中包含两个或多个方位角方向,使得一个第一方位角方向不和一个第二方位角方向平行,并且条成组排列,组中含有多个在第一方位角方向上的隔开的顺序条,后接多个在第二方位角方向上的隔开的顺序条,其中条成组排列,组中含有多个顺序子组,每个子组含有多于一个方位角方向的条,组间由同步特征分隔,此方法包括如下步骤:在转换方向上相对于多间隙伺服写头移动磁存储介质,所述伺服写头具有前导间隙和尾部间隙,所述前导间隙和尾部间隙转换方向上隔开,可被提供电流脉冲以产生磁通转换,并且对每个电流脉冲,在伺服磁道上记录第一方位角方向的一个或多个伺服模式条和第二方位角方向的一个或多个伺服模式条;对多间隙伺服写头提供多组重复的预定极性的电流脉冲,电流脉冲组之间通过一延迟时间间隔在时间上相互分隔开,组中重复脉冲的定时使得随组中每次电流脉冲而由尾部间隙记录的条完全在组中前次电流脉冲后由前导间隙所记录的条之外,并且延迟间隔足够长使得在一组的最后一次电流脉冲中由前导间隙所记录的条与随后的组中的第一次电流脉冲中由尾部间隙所记录的条之间在转换方向上的最小间距大于由一组电流脉冲所写的条集合中的任意一对顺序条之间在转换方向上的最大距离;重复提供电流脉冲的步骤,直至记录在存储介质上的条组成伺服模式。 56. A method for generating a servo pattern on a magnetic storage medium, the servo pattern includes a recording direction of the transition in the cyclic sequence of tracks of a magnetic storage medium of magnetic flux transitions, the magnetic flux transitions extend continuously along the servo track width and define servo pattern stripes, strips comprising two or more of the azimuthal direction, such that a first and a second azimuthal orientation is not parallel to the azimuthal direction, and the strips arranged in groups, the first group contains a plurality of orientation spaced sequential stripe diagonal direction, followed by a plurality of spaced strips in the second order of the azimuthal direction, wherein the strips arranged in groups, a group comprising a plurality of sequential subgroups, each subgroup contains more than one Article azimuthal direction, between the two groups are separated by synchronization features, the method comprising the steps of: converting direction with respect to multi-gap servo write head magnetic storage medium, said gap servo write head having leading and trailing gaps, the preamble separated by a gap and the trailing gap shift direction, may be provided to convert the current pulses to generate magnetic flux, and for each current pulse, recording one or more of the first servo pattern stripe azimuthal direction and a second orientation in the servo track a diagonal direction or a plurality of servo pattern stripe; multi-gap servo write head to provide a plurality of sets of repeated current pulses of a predetermined polarity, between the current pulse groups from each other by a delay time interval spaced in time, repeating group with the timing pulses such that each group of current pulses recorded by the trailing gap strip completely in the group recorded by the leading gap after the previous current pulse of the strip outside, and the delay interval long enough so that the last group of the current Article with a subsequent pulse in the group of the first current pulse is recorded by the leading gap is minimum pitch in the direction of conversion between the strip recorded by the trailing gap is greater than the current pulse is written by a group of article collection optionally converting the maximum distance in the direction between a pair of sequential stripe; repeat step providing current pulses until the recording on the storage medium strip composed servo pattern.
57.权利要求56中所述的生成伺服模式的方法,其特征在于在移动步骤中条在存储介质上沿转换方向的位置是通过以预定速率在转换方向上移动磁存储介质来控制的,并且在提供电流脉冲步骤中,条的位置是通过以固定时间间隔提供重复电流脉冲来控制的。 Generating the servo pattern 57. The method according to claim 56, characterized in that the moving step strip on the storage medium along the transducing direction at a predetermined position by the conversion rate in the direction to control the movement of the magnetic storage medium, and In the step of providing current pulses, the position of the through repeated at regular intervals to provide a current pulse controlled.
58.权利要求56中所述的生成伺服模式的方法,其特征在于在移动步骤中条在存储介质上沿转换方向的位置是通过反复测量磁存储介质的速率来控制的,并且在提供电流脉冲步骤中,通过在从速率测量导出的时间上提供重复的电流脉冲以获得所需的条间隔。 Generating the servo pattern 58. The method according to claim 56, characterized in that the moving step strip on the storage medium along the transducing direction position by repeatedly measuring the magnetic storage medium rate control, and to provide a current pulse step, by providing current pulses repeating at a rate derived from the measurement of the time to obtain the desired stripe spacing.
Description  translated from Chinese
伺服控制系统、伺服模式写设备及生成方法、存储系统 Servo control system, and a servo pattern writing apparatus generating method, the storage system

本发明一般地涉及到在磁存储介质上记录和读取数据,尤其涉及到维持磁头相对于磁存储介质上磁道的位置的伺服控制系统。 The present invention relates generally to the recording on a magnetic storage medium and reading data, and more particularly to the maintenance of the magnetic head relative to the servo control system of a magnetic storage medium on the track position.

在磁存储介质的磁道上记录和读取数据要求磁读/写头精确定位。 Requirements of recording and reading magnetic data read / write head accurately positioned on a track of a magnetic storage medium. 读/写头必须迅速地移到并保持在进行记录和读取数据的特定磁道的中央上方。 The read / write head must be moved quickly and maintain during recording and reading of data specific track above the center. 磁头随着发生在头和磁存储介质之间在转换方向上的相对运动记录和读取数据。 As occurred in the magnetic head for recording and reading data relative movement between the head and the magnetic storage medium in the transducing direction. 头从一个磁道平移过磁道宽度到达另一个磁道,这个方向同转换方向垂直。 Pan head from one track to another track arrival over the track width, with the shift direction perpendicular to this direction.

例如,一个可记录盘典型地包含同心数据磁道并在一个磁头下旋转。 For example, a recordable disk typically contains concentric data tracks and is rotated at a head. 旋转方向定义为转换方向。 Rotation direction is defined as the conversion direction. 从磁道到磁道的径向运动定义为平移方向。 Radial movement from track to track is defined as the direction of translation. 一个磁带典型地包含沿带的长度在转换方向上延展的并同带边缘平行的数据磁道。 A tape typically contains the length of the belt in the direction of extension of the data conversion and the same track with parallel edges. 然而在磁带螺旋搜索系统中,带在与带宽成一个角度移动的头下移动,对角线方向定义为转换方向。 However, in the tape spiral search system with bandwidth at an angle with movement of head movement, the diagonal direction is defined as a shift direction.

在磁介质上读取和记录数据的存储介质典型地使用伺服控制系统在平移方向上精确定位数据头。 Storage medium reading on a magnetic recording medium and data are typically used in the servo control system translational direction precise positioning of the data head. 伺服控制系统从一个读取存储介质上伺服磁道中所记录的伺服控制信息的伺服磁头上得到一个定位信号。 Servo control system, as recorded in the servo track to obtain a servo control signal to the servo positioning the magnetic head reads information from a storage medium. 典型地,伺服控制信息包含两种并行的但不相同的模式。 Typically, the servo control information comprises two parallel but not identical pattern. 伺服头沿着两种不同伺服模式之间的边缘移动,这两种模式与数据磁道相对准而记录。 The servo head servo pattern along the edge between two different movement, these two modes is aligned with the data tracks are recorded. 当伺服头位于相对于两种伺服模式边界的中央时,则相关的读/写头也位于相对于数据磁道的中央。 When the servo head is located with respect to the center of the two servo pattern boundary, then the associated read / write head is located in the center with respect to the data track.

伺服模式可包含半宽磁通转换的脉冲串,它们延展至伺服磁道的一半,具有不同的相位或频率。 Half-width of the servo pattern may comprise flux transitions of bursts, where they extend to half servo track, having a different phase or frequency. 因为一个单个的伺服位置由一对邻近的模式决定,这些模式常被称作″半磁道″。 Because a single servo position is determined by a pair of adjacent patterns, these patterns are often referred to as "half-track." 通常,伺服头的宽度大于或等于大约半个伺服磁道。 Typically, the width of the servo head is greater than or equal to approximately one-half servo track. 用一个半宽的伺服头,当头移动过半个磁道越过中央时可以立即确定为了达到中央位置而向哪个方向移动头。 With a half-width of the servo head, putting half of the track when moved across the center can be determined immediately in order to achieve a central position in which direction to move the head. 用小于半个磁道宽度的伺服头,当头完全越过一个伺服磁道或另一个的一半时也不能确定应向哪个方向移动。 With less than a half of the track width of the servo head, when the head completely across a servo track or the other half can not determine which direction should move. 大于半磁道宽度的伺服头通常用于嵌入式伺服系统,这种伺服系统和数据用同一个读头。 Greater than the half of the servo head track width typically used in embedded servo systems, such a servo system and data use the same read head. 这种系统中,每个其它模式是不同的以避免头跑进一个相邻的磁道模式中,这将无法确定向哪个方向移动。 Such systems, every other pattern is different in order to avoid head ran into an adjacent track pattern, which can not determine in which direction to move.

在Behr的美国专利No.3,686,649中描述了对半磁道伺服控制系统方法的另一种可选方式,它描述了一个使用伺服控制信息的盘驱动器伺服控制系统,伺服控制信息中包含从同一条平行于盘半径的线成不同角度的两个方向延展通过伺服磁道宽度的磁通转换线。 Behr described in U.S. Patent No.3,686,649 in the track servo control system for semi Method Alternatively, it describes a servo control information of the disc drive servo control system, the servo control information contained in the same parallel from line in the disc radius into two directions at different angles extend through the servo track width magnetic flux transitions line. 一对这样的转换线以对称四边形的形式定义了一个控制区。 A pair of such transition line to form a symmetrical quadrilateral defines a control area. 一个控制头检测一个由第一次转换产生的正向脉冲和一个由第二次转换产生的负向脉冲。 A control head is detected by the first conversion generates a positive pulse and a second conversion generated by the negative-going pulses. 这样产生的信号包含一个可与参考信号相比较的脉冲定位信号,以指示控制头偏离伺服磁道中心线多远。 Signal thus generated contains a reference signal is compared with the pulse position signal indicating deviation from the servo track centerline control head far. 此系统据称可允许存储盘上每英寸多于200条磁道。 The system is said to allow more than 200 tracks per inch on a storage disk. 然而,对盘存储设备和带存储设备要求有越来越大的存储密度。 However, disk storage devices and tape storage devices require ever greater storage density. 例如,常规盘设备可达到每英寸5000条磁道。 For example, conventional disk device can reach 5000 tracks per inch.

半磁道伺服控制法一般可满足直接访问存储设备,如盘驱动器。 Half-track servo control method generally meet direct access storage device, such as a disk drive. 带存储系统以独特的特点操作,即提高了提供高存储密度的难度。 Tape storage system to the unique operating characteristics, i.e. increase the difficulty of providing a high storage density. 在磁带存储系统中,存储介质/磁头的接触表面不象盘系统的环境那样清洁,并且,与盘系统不同,磁带运转时同磁头实际接触。 In magnetic tape storage systems, the storage media / magnetic head contact surface is not as clean as the environment disc system, and, with the disc system, the actual contact with the magnetic head while the tape is running. 相对不洁的环境和介质与头之间的接触,还有伺服头相对大的宽度,对介质和伺服头产生了显著的损坏和摩擦并在两者表面上产生了局部聚集的污染。 Environmental and contact between the medium and the head relatively unclean, and the servo head relatively large width of the media and the servo head generates significant damage and friction on both the surface and the local accumulation of contamination. 结果,伺服头对伺服控制信息的空间反应随着时间而变化,这或是随时间逐渐磨损的结果或是由于污染的碎屑之间脉冲串相互作用的结果。 As a result, the servo control of the servo head spatial response information changes with time, which results either over time or due to gradual wear of the result of contaminated debris burst between the interaction.

伺服头空间反应的改变使得在定位信号中产生差错,以至于当伺服头实际上已经偏离伺服磁道中心线时,一个定位信号可能会指示没有发生磁道错误配准。 Changing the servo head space of the reaction so that the positioning error signal is generated, so that when the servo head actually has deviated from the centerline of the servo track, a positioning signal may indicate that there is no occurrence of a track misregistration. 要将定位信号中的差错从定位信号本身检测出来是非常困难的。 To locate the error detection signal from the position signal itself is very difficult. 所以常常使用冗余伺服磁道来提高可靠性,这里伺服控制系统仅当两个或更多冗余磁道的数据一致时才使用定位信号。 So often used to improve the reliability of redundant servo tracks, where the servo control system with two or more redundant data consistent track used only if the positioning signals. 冗余伺服磁道降低了可用于数据记录的存储介质的表面积并需要更多的磁头和支持电路。 Redundant servo tracks reduce the surface area available for the storage medium of the data recording and require more heads and supporting circuitry.

由上面的讨论,很明显需要有一种特别适合于磁带系统的伺服控制系统以降低由于伺服头的磨损和碎屑造成的定位信号差错的幅度,并使得定位信号差错更容易检测,本发明满足了这一需要。 From the above discussion, it is clear need exists for a system particularly suitable for a tape servo control system in order to reduce the wear due to the servo head and debris caused by the positioning error of the signal amplitude, and making it easier to detect errors in the positioning signal, the present invention satisfies this need.

根据本发明,磁介质存储设备中的一个磁道跟随系统从一个或更多个特殊模式的伺服磁道中得到头定位信息。 According to the present invention, a magnetic media storage device to obtain a track following system head positioning information from one or more of the special mode of the servo tracks. 伺服模式包含记录于一个伺服磁道中多于一个方位角方向的磁转换,以使得在模式任意点上从所读取的伺服模式中得到的伺服定位信号脉冲的时序随着头越过磁道宽度的移动而不断变化。 Mobile servo pattern recorded in a servo track comprises more than one azimuthal orientation of magnetic switching, so that the timing of the servo position signal pulses at an arbitrary point on the pattern obtained from the servo pattern with the read head across the track width constantly changing. 由伺服读头产生的脉冲的时序由适当的电路解码以提供一个供伺服系统使用的速度恒定的定位信号,从而将数据头定位于存储介质的所需数据磁道上。 Timing pulses generated by the servo read head decoded by appropriate circuitry to provide a constant velocity servo system for positioning signal, whereby the data head is positioned on the desired data tracks of the storage medium.

在本发明的一方面中,伺服系统包括一个包含两个不同转换方位角方向的重复循环序列。 In one aspect of the present invention, the servo system comprises a converter comprising two different azimuthal directions repeated cycles of sequence. 例如,模式可以包含基本同磁道长度垂直的直的转换并交替以方位倾斜的转换。 For example, the track pattern may comprise substantially the same length and vertically straight conversion alternately inclined azimuth conversion. 也就是,方位倾斜的转换与头的转换方向成一角度延展越过磁道宽度。 That is, the conversion of the conversion and the oblique head extend at an angle across the track width. 由一个伺服读头读取的转换的相对时序与头相对于磁道中心的位置成线性关系。 Read by a servo read head relative timing of the head switching center of the track position with respect to a linear relationship. 通过确定两个定时间隔之间的比率来提供速度恒定性。 To provide a constant speed of timing by determining the ratio of the interval between the two. 具体讲,可通过使用在相同转换间测量的间隔来规范化不同转换间变化的时间间隔以确定这个比率。 Specifically, the conversion can be standardized between different time intervals to determine the change in the ratio between the same conversion by using the measurement interval. 最大动态范围和线性度可通过使用比伺服磁道模式宽度和数据磁道宽度窄的一个读头得到。 Maximum dynamic range and linearity to the data width and a track width narrower than the read head obtained by using a servo track pattern. 对伺服模式译码的同步通过在作为模式起始点的模式中提供称作空闲间隔或同步间隙的周期性间隙完成。 Periodic gaps synchronous servo pattern decoding as a model by providing a starting point called idle mode or synchronous gap spacing is completed.

在本发明的另一方面中,通过识别模式序列来完成差错检测和校正。 In another aspect of the present invention, by identifying the pattern sequence to perform error detection and correction. 例如,如果伺服模式在同步间隙间包含一预定数目的转换,那么如果在间隙间没有遇到所期望数目的转换则意味着伺服磁道读取错误。 For example, if the servo pattern contains a predetermined number of transitions between synchronization gaps, if not met then the expected number of transitions between the gap means that the servo track reading error. 同样,在一个伺服模式序列中不同间隔的时序必须同一个已知的格式匹配;在某些参数内的匹配失败意味着错误的伺服磁道读取。 Also, timing in a servo pattern sequence must match with different intervals a known format; match within certain parameters failure means that the error of the servo track reading. 在检测到某些错误后,系统可通过用一个不同(冗余)伺服磁道上的信息替换,或临时用一个估计值的信息替换,或通过其它方法来校正错误信息。 After some error is detected, the system can use a different (redundant) servo track information on replacement, or the replacement information with a temporary estimate value, or by other methods to correct the error message.

带存储介质上的伺服模式可使用一个多间隙伺服写头产生。 Servo mode with storage media can be used more than one generation gap servo write head. 头的间隙具有适于产生上面所描述伺服模式特征的形状。 The head having a gap adapted to generate the servo pattern features described above shape. 例如,为使伺服模式包含两个不同方位角方向的直转换,一个在每个方向上具有一个窄的直间隙的双间隙头满足了这一需要。 For example, for the servo pattern contains two different azimuthal directions straight conversion, a gap having a narrow straight double gap head meet this need in each direction. 在本发明的一个特征中,头的模式的间隙通过在一个铁氧体环磁头结构上用称作光刻的技术镀一层坡莫合金来产生。 In one feature of the present invention, the first pattern through the gap on a ferrite ring head structure with a known photolithography technology permalloy plating layer generates. 流经写头线圈的电流脉冲把头上间隙的几何模式转化为带上的相同磁模式。 Flowing through the write head coil current pulse to the head space of the geometric model into the same pattern of magnetic tape. 恰当的脉冲时序产生期望的模式序列。 Appropriate pulse sequence to produce the desired pattern sequence.

根据本发明,使用一个窄于写在存储介质上的伺服磁道的伺服读头减少了由于错误的定位信号引起的跟踪差错。 According to the present invention, the use of a narrower than written on the storage medium servo track servo read head to reduce the tracking errors due to the positioning error caused by the signal. 如果伺服读头较窄,伺服读头或存储介质上伺服模式的内部缺陷和磨损产生较小的定位差错。 If the servo read head is narrow internal defects, the servo read head or storage medium servo pattern and produce less wear positioning errors. 同样,如果伺服读头比数据磁道的宽度窄,存储介质或伺服读头上临时的或永久的碎屑的积累也产生较小的定位检测误差。 Similarly, if the servo read head is narrower than the width of the data track, storage media or servo read head temporary or permanent accumulation of debris also produce smaller location detection error. 本系统特别适用于使用同数据磁道永远分离的专用伺服磁道。 The system is especially suitable for use with the data track dedicated servo track is always separated. 但是本系统也可用于嵌入式伺服系统。 However, the present system can also be used in embedded servo systems.

在本发明的另一方面中,伺服控制系统检测具有第一转换极性的磁通转换而忽略具有第二转换极性的磁通转换。 In another aspect of the present invention, the servo control system detects magnetic flux having a first transition polarity and ignores magnetic flux transitions having a converter to convert the second polarity. 这样,伺服控制信息模式组只在具有相同极性的转换间给予定时。 Thus, only the servo control information pattern groups having the same polarity between the conversion given timing. 这就避免了由于在伺服写头的制造中,在实际伺服控制信息的写过程中磁带的特性和读头本身的不对称性而可能发生的转换的相反极性的时序中的偏移。 This avoids the opposite polarity due to the timing of the servo write head fabrication, the actual servo control information writing process in the tape and the read head itself characteristic asymmetry that may occur in the converted offset. 如果希望的话,可通过使用冗余的第二套相反极性转换来进一步提高信噪比。 If desired, by using the redundant second set of opposite polarity conversion to further improve the SNR.

通过下面对最佳实施方式的描述,本发明的其它特征和优点将会很清楚,以下用举例的方法描述了本发明的原理。 Through the following description of the preferred embodiments, other features and advantages of the invention will become apparent from the following description by way of example the principles of the invention.

图1是一个根据本发明构造的带驱动存储设备和相关带盒的透视图。 Figure 1 is a perspective view of the present invention is constructed in the tape drive storage device and associated tape cartridge according to.

图2是一个表示图1所示的带驱动器和带盒组合中磁头和伺服控制系统的原理图。 Figure 2 is a schematic diagram showing a tape drive and a tape cassette 1 shown in Fig combination magnetic head and servo control system.

图3是一个表示根据本发明的可选择的头组件的原理图。 Figure 3 is a schematic diagram showing an alternative in accordance with the present invention, the head assembly.

图4,5和6表示根据本发明构造的三种可选的伺服模式。 Figures 4, 5 and 6 show three optional servo pattern constructed in accordance with the present invention.

图7图示了由图2中所示磁头产生的伺服控制信号。 Figure 7 illustrates a servo control signal from the magnetic head shown in FIG. 2 production.

图8表示伺服头跟踪图6中所示伺服模式的轨迹和它产生的头输出信号图。 Figure 8 shows a tracking servo head tracking servo pattern shown in FIG. 6 and FIG head output signal it generates.

图9表示伺服头跟踪一种根据本发明图示的第四种可选伺服模式的轨迹和它产生的头输出信号。 Figure 9 shows the servo head tracking an optional servo pattern according to the present invention is illustrated in the fourth track and first output signal it produces.

图10,11和12是用于图2中所示伺服控制系统的定位信号译码器的框图。 10, 11 and 12 is a block diagram of a servo control system in Fig. 2 positioning signal decoder.

图13,14,15和16是用于图2中所示伺服控制系统的一种可选的定位信号译码器的框图。 Figure 13,14, 15 and 16 is a block diagram of an optional position signal decoder for the servo control system shown in FIG. 2 for.

图17表示伺服头跟踪图9中所示伺服模式的轨迹,同时表示了它产生的头输出信号和相应的A和B信号间隔。 Figure 17 shows the track 9 the servo head shown in FIG tracking servo pattern, while the output signal represents the head it generates and the corresponding A and B signal intervals.

图18是一张存储于图13所示系统中用于解调图17中所示伺服模式的数据表。 FIG 18 is a memory in the system shown in FIG. 13 for demodulating the servo pattern shown in FIG. 17 data tables.

图19表示在磁存储带上记录伺服模式的一个鼓系统。 Figure 19 shows a drum in a magnetic tape storage system record servo pattern.

图20表示可被图19中所示系统记录于一部分磁带上的磁通转换。 Figure 20 shows the system can be shown in Figure 19 a portion of magnetic flux transitions recorded on the tape.

图21表示可用于记录图9中所示伺服模式的一个多间隙头。 Figure 21 shows a multi-gap head can be used to record the servo pattern shown in FIG. 9.

图22是图21所示头的一个横截面。 Figure 22 is a cross-sectional head 21 shown in FIG.

图23是图21和22所示头的伺服模式间隙域的平面图。 Figure 23 is a plan view of the head shown in FIG. 21 and 22 of the servo pattern gap region.

图24是一个表示根据本发明构造的用于写磁带的伺服写头的原理图。 Figure 24 is a representation of the write head constructed in accordance with the present invention for servo write tape schematic.

图25是一个表示根据本发明的用于生成磁带的记录系统的原理图。 Figure 25 is a representation according to the principles of the present invention for generating the magnetic tape recording system of FIG.

图26是图25所示记录系统的原理图。 FIG 26 is shown in Fig. 25 a schematic diagram of the recording system.

图1表示了一个根据本发明构造的基于定时的伺服系统。 Figure 1 shows a timing based servo system constructed in accordance with the present invention. 这个系统包括一个接收一个带数据带盒14的驱动器,后者通过一根数据电缆18连接列主处理器16。 This system includes a receiver with a data tape cartridge drives 14, the latter is connected via a data cable 18 out of the main processor 16. 带盒包括一个含有一卷磁带20的盒子19。 The cartridge includes a cartridge containing a tape 20 of 19. 为使用伺服控制信息所构造的本系统包含一个磁通转换的重复伺服模式,此模式记录于数据带盒中磁带20上的磁道中,并延展越过磁道宽度以使随着一个磁伺服读头在平移方向上移过磁道宽度时通过读取伺服控制信息而产生的一个伺服定位信息信号在不断变化,以此指示头在磁道中的相对位置。 Is constructed using the servo control information of the present system comprises a repeating servo pattern of magnetic flux transitions, data recorded in this mode the tape cassette on the magnetic tape in track 20, and extends across the width of the track so that as a magnetic servo read head When moved over the track width direction of translation is generated by reading the servo control information of a servo positioning information signal changing, thereby indicating the relative position of the head in the track. 带驱动器12可以读取伺服控制信息并产生一个定位信号来控制相关数据读头的位置,或使用一个磁伺服写头把伺服控制信息写到数据带盒中的磁道上,或二者都做。 The tape drive 12 can read the servo control information and generate a position signal to control the position of the associated data read head, or by using a magnetic servo write head to servo control information is written on the data track tape cartridge, or do both. 这个系统加以最优化以便用于磁带环境,以使由于磨损和碎屑引起的定位信号差错的幅值降低并且这种差错易于检测。 The system to be optimized for use in a tape environment, so as a result of wear and debris caused by the magnitude of the positioning signal error is reduced and this error is easy to detect.

带驱动器12包含一个带盒14可以插入的接收槽22。 The tape drive 12 includes a tape cartridge 14 can be inserted into the receiving slot 22. 主处理器16包括,举例而言,一台个人计算机如IBM公司的“PS/2”个人计算机,或一台工作站如IBM公司的“RS6000”工作站,或是一台小型机如IBM公司的“AS400”计算机。 Host processor 16 includes, for example, a personal computer, such as IBM's "PS / 2" personal computer or a workstation, such as IBM's "RS6000" workstation, or a minicomputer as IBM's " AS400 "computer. 带驱动器12可很好地与这些主处理器和使用带盒的带库系统,如IBM公司的“3480”和“3490”带驱动装置兼容。 The tape drive 12 can be a good use with these host processor and a cassette tape library systems, such as IBM's "3480" and "3490" tape drive compatible. 带盒14可采用多种带盒格式中的任意一种,包括如常规的8mm,4mm,1/4英寸和1/2英寸数据带盒格式。 Cassette tape cassette 14 can be a variety of formats any one, including such as a conventional 8mm, 4mm, 1/4-inch and 1/2 inch data cartridge formats.

图2是带盒14(图1)中磁带20的一部分通过带驱动装置12的一个磁头组件24的俯视图。 Figure 2 is a portion of tape cartridge 14 (FIG. 1) in the magnetic tape 20 by a magnetic head assembly 12 of the tape drive device 24 in a plan view. 在剖视图中用虚线表示出带从哪里在头组件下面通过。 Sectional view shown with dashed lines, where the head assembly from following through. 头组件用实线表示并包括一个用来检测记录于带上的伺服磁道27的相对窄的伺服读头26。 Represents and includes a head assembly for detecting recorded servo track on the tape 27 of a relatively narrow servo read head 26 with a solid line. 为了图示相对大小,同时表示出的是定位于包含多个数据磁道的带中数据磁道域29之上用于读取记录于数据磁道上数据的头组件中的一个数据读头28。 To illustrate the relative size, while shown is positioned comprising a plurality of data tracks on tape field 29 data tracks on the recording head unit for reading the data in the data tracks of a data read head 28. 为简化叙述,图2给出了一个单个的伺服读头和一个单个的数据读头。 To simplify the description, Figure 2 shows a single servo read head and a single data read head. 熟练的技术人员懂得大部分带系统具有多个伺服磁道,多个伺服读头,多个数据读和写头。 Most skilled in the art will appreciate that belt system having a plurality of servo tracks, multiple servo read heads, a plurality of data read and write heads.

在图2中,所指示的伺服磁道中心线30沿带20的长度延展。 In Figure 2, the servo track centerline 30 as indicated by 20 extend along the tape length. 图2表示出伺服读头是相对窄的并且宽度实际上小于伺服磁道27的宽度。 Figure 2 shows the servo read head is relatively narrow and a width substantially less than the width of the servo track 27. 具体讲,在最佳实施方式中伺服读头的宽度小于一个单个数据磁道的半个宽度(未表示出),它典型地比一个伺服磁道更窄。 Specifically, the servo read head in the preferred embodiment, the width is less than one half the width of a single data track (not shown), which is typically narrower than a servo track.

在图2中,当带20相对于头沿磁道30的长度线性移动时出现,带头在转换方向内的相对移动,这种移动可使伺服读头26读取伺服模式。 In Figure 2, when the belt 20 with respect to the head 30 along the length of the linear movement of the track occurs, relative movement of the lead in the direction of the conversion, this movement allows the servo read head 26 reads the servo pattern. 当这种移动出现时,伺服读头检测磁通转换的伺服模式以使它产生一个通过伺服信号线34提供的模拟伺服读头信号并送给译码器36。 When this movement occurs, the servo read head detects flux transitions in the servo pattern so that it generates an analog servo read head signal by a servo signal line 34 and supplied to the decoder 36. 信号译码器处理伺服读头信号并产生一个定位信号,后者借助于定位信号线38传送给伺服控制器40。 Signal decoder processing the servo read head signal and generates a position signal, which is transmitted by means of the positioning signal line 38 to the servo controller 40. 伺服控制器产生一个伺服机械控制信号并借助于控制线42传送给头组件24。 Servo-mechanical servo controller generates a control signal transmitted by means of the control line 42 to the head assembly 24. 一个头组件的伺服机械通过在平移方向上移动头26使之越过伺服磁道30的宽度来响应来自伺服控制器的伺服信号。 A servo-mechanical head assembly is moved in the translational direction by head 26 so that across the width of the servo track 30 in response to a servo signal from the servo controller. 伺服控制器40监视来自信号译码器36的定位信号并产生到达目的位置所需的控制信号,以使当头到达期望目标时控制信号等同于这个信号。 The servo controller 40 monitors the position signal from the signal decoder 36 and generates the control signals required to reach the destination, so that the control signal when the head reaches the desired target is equivalent to the signal.

图3表示了根据本发明构造的一个多伺服磁道、多头系统。 Figure 3 shows a multiple servo track according to the present invention is constructed, multi-head systems. 此系统除下列方面外同图2所示系统很相似。 This system except the following aspects of the same system as shown in Figure 2 is very similar. 图3中的头组件24'包括一个数据读头28a和一个数据写头28b,分别用于在带数据域29的数据磁道上读和写数据。 Figure 3 head assembly 24 'includes a data read head 28a and a data write head 28b, respectively, for reading and writing data on a data track with the data field 29. 图3所示的带20'除第一伺服磁道27之外还包括一个第二伺服磁道27',这些伺服磁道放置在数据域29的相对两侧。 Shown in Fig. 3 with 20 'in addition to the first servo track 27 further comprises a second servo track 27', these servo tracks disposed on opposite sides of the data field 29. 同时还示出了第二伺服磁道的中心线30'。 It also shows a second servo track centerline 30 '. 图3中头组件24'也包括一个用于读取记录于第二伺服磁道27'的伺服信息的第二伺服读头26'。 Figure 3 head assembly 24 'also includes a second for reading recorded in the servo track 27' of the second servo read head 26 is servo information '. 应注意头组件24'产生两个伺服信号,每一个用于一个伺服读头。 Should be noted that head assembly 24 'produces two servo signals, one for each servo read head. 头组件通过信号线34把来自第一伺服读头26的伺服信号提供给相应的译码器36并通过信号线34'把来自第二伺服读头26'的伺服信号提供给相应的译码器36'。 Head assembly provided to a respective decoder via a signal line 34 the servo signal from the first servo read head 26 and 36 'from the second servo read head 26' servo signal provided to a respective decoder 34 through the signal line 36 '. 这些相应的译码器把它们的定位信号提供给伺服控制器40。 These respective decoders to their positioning signals to servo controller 40. 应注意大部分带系统包含多个数据读头和写头,为了叙述的目的图3中只给出了单独的一对。 Should be noted that most tape systems include a plurality of data read head and write head, for the purposes described in Figure 3 shows only a single pair.

如上面提到的,根据本发明的伺服模式包含越过伺服磁道宽度延展的磁通转换,以使随着伺服读头移过每个伺服磁道的宽度时通过读取模式所产生的伺服读头信号将不断变化。 When the servo read head signal, as noted above, servo patterns in accordance with the present invention comprises a servo track width to extend across the magnetic flux transitions, so that as the servo read head moves across the width of each servo track pattern generated by reading The constantly changing. 图4,5和6给出了根据本发明的伺服模式的几种可选实施方式。 Figures 4, 5 and 6 shows the range of several servo patterns in accordance with an embodiment of the present invention. 熟练的技术人员可识别出黑色的垂直条,此后称为条,表示越过伺服磁道宽度延展的记录磁通量的磁化区,条的边缘包含用于检测产生伺服读头信号的磁通转换。 The skilled artisan can identify a black vertical strips, hereinafter referred to as bar represents extend across the width of the servo track of the magnetic flux of the recording area, comprising means for detecting the edge of the magnetic flux is generated to convert the servo read head signal. 这种转换具有两个磁极性,每个在条的一个边缘。 This conversion has two magnetic polarities, one edge of each strip. 当伺服读头越过转换时,它产生一个其极性由转换的极性所确定的脉冲。 When the servo read head over the conversion, it produces a pulse whose polarity is determined by the polarity conversion determined. 例如,伺服头可以在每个条的前沿(遇到一个条时)产生一个正脉冲,在后沿(离开一个条时)产生一个负脉冲。 For example, the servo head can generate a positive pulse at the leading edge of each bar (a bar when encountered), the trailing edge (leaving a stripe) generates a negative pulse. 每个伺服模式包含一个不同条的重复序列,这些条至少以两个方向越过磁道宽度以使第一个方向同第二个方向不平行。 Each servo pattern comprises a repeating sequence of different strips, the strips in at least two directions across the track width so that the first direction is not parallel with the second direction.

例如,在图4中,伺服模式44包含一个交替的条序列,越过磁道宽度延展的第一种条46实际上同磁道的转换方向垂直,第二种条48相对于读头有一个方位倾斜。 For example, in Figure 4, the servo pattern 44 comprises an alternating sequence of strips across the width of the first tracks 46 extending substantially perpendicular to the track direction with the conversion of the second strip 48 with respect to the read head has an inclined orientation. 也就是说,第二种条相对于磁道中心线49的平移方向有一个倾斜度。 That is, the second bar relative to the track centerline 49 of a translational direction inclination. 图5中所示的模式50包含一个由第一种条52和第二种条54组成的交替序列,第一种直的条52与磁道中心线垂直,第二种人字形的条具有对于磁道中心线倾斜对称的两条腿。 Mode shown in FIG. 5 contains a 50 by a first strip 52 and second strip 54 composed of alternating sequence, the first straight section 52 perpendicular to the track center line, the second strip having a chevron for tracks centerline symmetrical tilt legs. 也就是说,模式50包含一个其特点为由两个相互影响的磁道形成的条,每个磁道包含人字形的一条腿54a或另一条腿54b。 That is, the pattern 50 comprises an article which is characterized by the interaction of the two tracks forming each track comprising a human-shaped leg 54a or the other leg 54b. 图6中的模式56包含人字形的第一种条58和第二种条60,它们背靠背地放置以形成一个关于磁道中心线62对称的菱形模式。 Figure 6 pattern 56 comprises chevron-shaped first 58 and second bar 60 bar, they are placed back to back to form a symmetric about the track centerline 62 diamond pattern. 很明显,模式56也可以认为是一个包含相对一个条的中心线相互影响的两个伺服磁道的条。 Clearly, patterns 56 may be considered a relative a centerline strip comprising interaction of the two servo track strips.

对于图4-6中所示的每一种伺服模式44,50,56,随着带在转换方向上相对于头做线性移动时定位于带20上的一个伺服读头产生一个具有峰值的模拟伺服读头信号,这些峰值的峰到峰周期随头在平移方向上移过磁道的宽度而变化。 For each of the servo pattern in FIG. 4-6 44,50,56 shown, with the tape in the transducing direction relative to the head is moved linearly positioned on belt 20 of a servo read head generates an analog having a peak The servo read head signal, these peaks with peak-to-peak period in the translational direction moves the head across the width of the track varies. 由下面更完整的描述,定时值的变化被用来确定磁伺服读头在伺服磁道内的相对位置。 From the following more complete description of the change timer value is used to determine the relative position of the magnetic servo read head within the servo track.

图4-6中所示的伺服模式44,50,56包括定义了第一和第二种间隔的第一和第二种条,分别标作A间隔和B间隔,它们被用来产生一个独立于带速的定位信号。 Servo pattern shown in FIG. 4-6 44,50,56 comprises defining a first and second strips of the first and second intervals, respectively, labeled as A intervals and B intervals, which are used to generate an independent in belt speed positioning signals. 通过对间隔定时并计算它们的比率来产生定位信号。 Through the interval timer and calculates their ratio to produce the positioning signal. 对这些模式,一个A间隔被定义为沿磁道的转换方向从一条磁带的一个条到另一个条磁带的下一个条之间的间隔,而B间隔定义为沿磁带的转换方向上同一磁带的两个条之间的间隔。 For these patterns, an A interval is defined as the shift direction along a track of the tape from one strip to the next strip of another spacer strip between the magnetic tape, and B is defined as the interval along the tape transducing direction on the same tape in two interval between two bars. 应该清楚,从条到条的定时间隔随伺服读头在平移方向上移过磁道宽度而变化。 It should be clear, from bar to bar timing interval with the servo read head in the translational direction and moved across the track width change. 还应注意,只有A间隔变化,B间隔是恒定的,而与位置无关。 It should also be noted that only the A intervals change, B intervals are constant, regardless of position.

这样,在图4中,将被称为A1的第一个A间隔从第一个垂直的条延展至第一个具有一个方位倾斜的条,第一个B间隔B1从第一个垂直的条延展至第二个垂直的条,可以同样定义以后的伺服模式间隔A2,A3,...和B2,B3,...。 Thus, in Figure 4, the first A interval A1 will be referred to from the first perpendicular stripe to the first extension having an orientation inclined section, the first B interval B1 from the first perpendicular stripe extend to the second perpendicular stripe, can also define the servo pattern after the interval A2, A3, ... and B2, B3, .... 图5中,第一个A间隔A1从一个垂直的条延展至第一个人字形的条同时第一个B间隔B1从第一个垂直的条延展至第二个人字形的条。 Figure 5, the first A interval A1 from a vertical stripe extended to the first person shaped bar while the first B interval B1 from the first vertical Ordinance to the second person shaped bar. 第二个间隔B2从第二个垂直的条延展至第三个垂直的条。 The second interval B2 from the second vertical bars extend to the third vertical bars. 图6中,第一个A间隔A1,从包含第一个菱形左边部分的第一个人字形延展至包含第一个菱形右边部分的下一个人字形,同时第一个B间隔B1,从第一个菱形左边部分延展至第二个菱形右边部分。 6, the first A interval A1, comprising a first from a first personal-shaped diamond left part extended to the next person comprising a first diamond-shaped right section, while the first B interval B1, from a diamond on the left part of the extension to the right part of the second diamond. 第二个A间隔A2从第二个菱形的左边部分延展至第二个菱形的右边部分。 The second A interval A2 extend from the left part of the second diamond to the right part of the second diamond. 第二个B间隔B2从第二个菱形的左边部分延展至第三个菱形的左边部分。 The second B interval B2 extend from the left part of the second diamond to the left portion of the third diamond. 应注意最后一个条没有用来定义一个间隔。 Note that the last one did not used to define an interval bar.

根据本发明的一个伺服控制系统提供了一种装置,用于确定伺服读头与伺服模式起点与终点的相对位置。 Provided an apparatus of a servo control system according to the invention for determining the relative position of the servo read head and the servo pattern start and end points. 模式内位置的确定使得系统得到下一个将读到的条的特性并完成差错检测,如果希望的话,也可完成差错校正。 Within the model to determine the location of the feature allows the system to get the next one will be read and complete error detection, if desired, can also be done error correction. 例如,在图4所示的第一种伺服模式44这种形式中,系统可以得知下一个将读到的条是一个直的转换还是方位倾斜的转换。 For example, in the first servo pattern shown in FIG. 4 44 this form, the system can learn to read the next strip is a straight or oblique conversion conversion. 在最佳实施方式中,由伺服译码器所检测的伺服模式中的一个周期性同步特征来确定位置。 In the preferred embodiment, the servo decoder detected servo pattern in a periodic synchronization feature to determine the location.

在图4,5和6所示的模式中,同步特征在条组之间含有空闲间隔。 In the patterns shown in Figures 4, 5 and 6, characterized in that the synchronization between the strip group comprising idle interval. 空闲间隔是没有转换的,这样可使得在大于一组中任意两个条之间的最大间隔的间隔中不会在转换方向上出现条。 Idle interval is not converted, so that can make the conversion does not occur in the direction of the strip than the maximum interval between any two strips set intervals. 如果希望的话,非伺服控制模式数据的信息可放置于空闲间隔内。 If desired, the information non-servo control mode data can be placed in the idle interval. 例如,如果条之间的间隙至少有两个不同的长度,可把信息以间隙长度的一串码的形式写入同步特征的空闲间隔。 For example, if the gap between the strips of at least two different lengths, information may be in the form of the gap length of a string of code written synchronization feature spacing intervals. 这些信息可用来指示数据块位置,带的纵向位置,或其它用于驱动器操作的信息。 This information may be used to indicate that the block position information with the longitudinal position, or other means for drive operation. 因为系统可以知道一个空闲间隔后的下一个磁通转换是一个垂直组条所以伺服控制系统用空闲间隔来同步以确定位置。 Because the system can know where the next flux converted a free interval is a vertical bar set so the servo control system to synchronize with the idle interval to determine the location. 连续空闲间隔之间的条组被称作“伺服脉冲串”。 Article contiguous free space between the group is called "servo bursts." 每个伺服脉冲串包含一定数量的条和转换,下面进一步描述将它们用于差错检测和校正。 Each servo burst contains a number of bars and convert them further described below for error detection and correction. 当高效地利用了带介质时,每个脉冲串带的条的数目提供了合适的伺服控制同步,这使得在每个不同条之后不需要一个同步特征来获得合适的同步。 When the efficient use of the tape medium, the number of stripes per burst provides suitable band servo control synchronization, which eliminates the need for an article after each of the different synchronous to obtain suitable synchronization.

例如,在图4中,图示了一个第一种伺服模式组66和一个第二种伺服模式组68。 For example, in Figure 4, illustrating a first servo pattern group 66 and a second servo pattern group 68. 第一和第二种伺服模式组由一个包含一个空闲间隔70的同步特征分开。 The first and second groups are separated by a servo pattern includes a synchronization feature 70 free interval. 对于一个大于A间隔的间隔,空闲间隔沿带在转换方向上延展,这个间隔是从第一个垂直方向的条到第二个倾斜方向的条之间的间隔。 For an interval greater than the interval A, idle intervals along the belt in the direction of extension of the conversion, this interval is a vertical direction from the article to a second spacer between the tilt direction. 同样,图5给出了伺服脉冲串74,76之间的一个空闲间隔72,图6给出了伺服脉冲串80,82之间的一个开始间隙78。 Similarly, Figure 5 shows the servo bursts 74, 76 an idle interval between the 72, Figure 6 shows a start gap between servo bursts 80, 82, 78. 如上边所提到的,非伺服模式数据的信息写在这些间隔中。 As mentioned upper, non-servo pattern information is written in the data interval.

为了降低头不规则性的几率和控制系统由于伺服读头信号失真引起的不稳定,根据本发明的控制系统仅在具有相同极性的磁通转换之间将A和B间隔定时。 To reduce the chance of head irregularities and control system due to the servo read head signal distortion induced instability, the control system according to the invention only in the A and B having the same polarity as the timing intervals between magnetic flux transitions. 这样做是因为,例如,伺服写头构造中的不对称性,实际伺服写过程中的变化和由于磁带本身或读头特性的其它缺点可能会在具有相反极性转换的定时中引起偏移。 This is because, for example, the servo write head structure of the asymmetry, the actual servo-writing process and as a result of changes in the tape itself or other disadvantages heads characteristics may cause shift in the timing of the conversion of the opposite polarity. 仅在相同极性的转换间定时,可消除由于极性间的不同造成的定时差错。 Only during the same polarity conversion timing, can be eliminated due to timing errors between different polarities caused. 例如,只有如读头在通过条的前沿时产生的转换脉冲可以使用。 For example, as the read head switching pulse only when passing through the leading edge strip produced can be used. 通过条的后沿时产生的转换脉冲被忽略。 When the trailing edge of the switching pulse generated by the article are ignored.

通过使用相反极性的第二套冗余的转换可进一步降低信噪比。 By using the redundant second set of opposite polarity conversion signal to noise ratio can be further reduced. 在这种情况下,将提供一个冗余伺服模式译码系统用于将定位信号从两种极性的磁通转换中分离出来进行译码。 In such a case, will provide a redundant servo pattern decoding system for positioning signal is separated from the magnetic flux transitions of both polarities out decoding. 为了进行详细描述,将对与一个极性相关的译码系统进行描述。 For a detailed description, will be associated with a polar decoding system will be described. 但是应该知道,可以提供一种用于具有相反极性转换的类似的译码系统。 It should be understood, can provide a similar decoding system having the opposite polarity conversion.

图7表示当图2所示的磁头读取图4所示的伺服模式时产生的模拟伺服读头信号84。 Figure 7 shows an analog servo read head signal is generated when the magnetic head 2 shown in Fig read the servo pattern shown in FIG. 4 84. 图7表示出当伺服读头越过图4的第一条的前沿时出现了第一个伺服读头信号峰值86。 Appeared the first servo read head signal peak 86 Figure 7 shows when the servo read head over the first frontier in Figure 4. 当伺服读头越过图4的第一条的后沿时出现了第一个负峰值88。 Appeared the first negative peak 88 when the servo read head over the map in Article 4 of the trailing edge. 第二种转换极性被忽略了。 The second conversion polarity is ignored. 余下对伺服系统的描述将涉及到仅检测伺服读头信号的正峰值。 The remaining description of the servo system will relate to detecting only the positive peaks of the servo read head signal.

图8表示一条伺服读头所沿路径的图6的菱形模式,在它下面是磁伺服读头越过伺服模式条时产生的相应伺服读头信号92,并指示出了A和B间隔。 Figure 8 shows a servo read head along the path of the diamond pattern in Fig. 6, in which the following are the corresponding servo read head signal is generated by the magnetic servo read head over the servo pattern when the article 92, and indicates the A and B intervals. 如上所述,每个连续的A间隔称作A1,A2,等等,B间隔类似地称作B1,B2,等等。 As described above, each successive A interval is called A1, A2, and so on, B intervals similarly called B1, B2, and so on. 图8表示移过各个条时产生的一个正峰值并定义了模式间隔,而在为定位信号的产生而确定定时间隔时忽略了下降的峰值。 Figure 8 shows a positive peak and defines the pattern interval generated when the shift through each item, and to generate a position signal in determining the timing interval of the downward peaks are ignored. 图8指示出伺服模式大约宽408微米长434微米。 Figure 8 indicates the servo pattern is about 434 microns wide and 408 microns long.

图9给出了一个可选的嵌入式的,或交错的菱形模式94,同时表示了伺服读头所沿的路径96,它下面表示了头越过伺服模式条时产生的输出信号97,并指示出了A和B间隔。 Figure 9 shows an alternative nested, or interleaved diamond pattern 94, also said the servo read head along the path 96, below it represents the output signal produced when the head over the servo pattern section 97, and instructs the out of the A and B intervals. 交错的菱形模式包含一个由一组人字形转换构成的五个交错菱形的序列,随后跟有四个交错的菱形。 Interleaved diamond pattern comprises a herringbone conversion by a group of five interleaved diamond constituting a sequence, then followed by four interleaved diamonds. 重复这个序列以构成这种伺服模式。 Repeat this sequence to form such a servo pattern.

图9所示的五个菱形和四个菱形的各组由一个相对短的空闲间隔99所分隔,这个间隔最窄处的宽度大于一个交错组内任意两个同类条之间的间隔并且位于任意两组之间。 Each group consists of a relatively short spacing intervals separated by 99, the width of the narrowest point of the gap is greater than an interval of alternating between any two similar strips and located at any of the four FIG five diamond and diamond 9 shown in between the two groups. 不具有转换的另一类型的模式间隙位于图9模式中的一组菱形内部,这也是很明显的。 Another type having no mode conversion in Figure 9 is located in a gap of a set of diamond-shaped pattern in the interior, which is also very obvious. 因为内部间隙98出现在一个四菱形和五菱形的序列之间或一个五菱形和四菱形的序列之间,所以可以很容易的区分出来。 Because the internal gap 98 is present between the sequence between one and five four-diamond or a diamond-shaped four-five-diamond and diamond sequences, it can be easily distinguished. 与此对照,因为空闲间隔99仅在具有相同数目的条的两个条序列之后出现,如在两个4条组或两个5条组之后,所以可被识别出来。 After this control, since only idle interval 99 having the same number of sequences of the two strips appear, such as after two or four groups of two 5 groups, it is possible to be identified.

图9给出了最佳实施方式中的伺服模式。 Figure 9 shows the preferred embodiment of the servo pattern. 尺寸如下:转换方向上的带宽2.5um。 Dimensions are as follows: bandwidth 2.5um conversion direction. 一个组内条的区间为5um。 A group within the range bar for 5um. 伺服模式垂直于转换方向的宽度为408um,分成宽为204um的对称两半。 The width of the servo pattern perpendicular to the transducing direction is 408um, symmetrical 204um width divided halves. 条相对于转换方向的垂线倾斜成7。4度角。 Article perpendicular direction with respect to the conversion into a 7.4-degree tilt angle. 在下面的尺寸中,所有的长度从一条的前沿到另一条的前沿度量:菱形之间的空闲间隔99在最窄处为10um;4菱形组中的内部间隙为15um;5菱形组中的内部间隙为10um。 In the following dimensions, all lengths from a leading edge to leading edge of another measure: idle interval between the diamond 99 at the narrowest point of 10um; 4 diamond group internal clearance is 15um; 5 diamond group internal gap 10um.

图9图示出一个A间隔定义为从一个菱形左侧的一条延展至这个菱形右侧相应的条。 Figure 9 illustrates an A interval is defined as extending from a left side of a diamond to the right side of the diamond corresponding strip. 例如,第一个A间隔A1从第一个菱形左侧的第一条延展至这个菱形右侧的第一条。 For example, the first A interval A1 from the first article of a diamond on the left side to the right side of the diamond-shaped extension of the first. 相应的B间隔从一个菱形左侧的一条延展至下一个菱形左侧相应的条。 B interval corresponding to extend from one to the left of a diamond a diamond on the left side under the corresponding article.

图9中所示的模式94最大限度地利用了磁道的长度来产生定位信号。 Mode 94 shown in FIG. 9 to maximize the use of the length of the track to generate the positioning signal. 模式每隔221um重复一次,这样,与其它所示伺服模式的较长周期采样区间相比,采样区间长仅为221um。 Repeat once every 221um mode, so a longer period compared to other sampling intervals shown in servo mode, the sampling interval length is only 221um. 因为图9中每个交错的菱形伺服模式包含一定数目的条,同步特征的空闲间隔可通过计算伺服读头经过的条数来检测。 Figure 9 because each interleaved diamond servo pattern contains a number of bars, synchronous idle interval can be calculated several servo read head through to testing. 把模式分成四个菱形后跟五个菱形的组使得译码器可确定头在转换方向上相对于磁道的位置。 The model is divided into four diamond followed by five diamond group makes the decoder can determine the position of the head to the track direction with respect to the conversion. 更具体讲,即使在译码器错过了一条的情况下也能够自身进行同步,因为它可以期望在收到两个五条的脉冲串后,接下来将收到两个四条的脉冲串,然后又是两个五条的脉冲串,如此这样循环。 More specifically, even when the decoder missed a case where it is possible to synchronize itself, because it can expect after receiving two bursts of five, next will receive two bursts of four, then two five bursts, so the cycle. 这个优点可用于实施一个相对简单的差错检测和校正方案。 This advantage can be used to implement a relatively simple error detection and correction scheme.

图9所示模式94的尺寸给出了一个最佳设计,它平衡了三个伺服要求:伺服模式宽度,采样频率和定位信号噪音。 Dimensions shown in FIG. 9 shows the pattern 94 of a preferred design, it balances three servo requirements: servo pattern width, the sampling frequency and position signal noise. 模式宽度(图9中标示为408um)确定了伺服读头信号的范围。 Pattern width (Figure 9 marked as 408um) to determine the scope of the servo read head signal. 这个范围可以是几个数据磁道的宽度(未表示出)。 This range can be the width of several data tracks (not shown). 在这个实施方式中伺服模式的宽度大约等于八个数据磁道的宽度,这可以使得一个伺服读取部件可用来定位八个不同数据磁道上的一个给定数据读头。 In this embodiment, the width of the servo pattern is approximately equal to the width of eight data track, which can make a servo reading means can be used to locate one of eight different data tracks on a given data read head.

伺服读头信号的采样频率由伺服模式的长度和带速决定。 Sampling frequency servo read head signal is determined by the length of the servo pattern and the tape speed. 在最佳实施方式中,伺服模式长为221um。 In the preferred embodiment, the servo pattern length of 221um. 它在这段空间中产生两个数据点,一个在间隔B4的末端,一个在间隔B8的末端。 It generates two data points in this space, one end of the interval B4 and one at the end of the interval B8. 在大约2。0m/s的典型带速下,这就产生了一个每秒18,100次采样的频率。 In a typical tape speed of approximately 2.0m / s, which generates a frequency of 18,100 samples per second. 采样频率的要求由伺服回路的其余部件确定。 The sampling frequency is determined by the requirements of the remaining components of the servo loop. 如果采样频率太低,必须降低回路的动态响应以在系统中保持用于精确控制回路稳定性的足够的相位裕度。 If the sampling frequency is too low, you must reduce the dynamic response of the circuit in order to maintain adequate phase margin for precise control loop stability in the system.

定位信号的噪音由三个因素决定:转换间隔定时度量中的噪音,每次采样所度量的转换间隔定时的数目,和转换间隔定时到定位信号的换算系数。 Noise positioning signals determined by three factors: the conversion of the noise measurement interval timer, the metric conversion for each sample interval timer number, and converted to a positioning signal timing interval conversion factor. 一些因素如介质噪音和电子噪音决定了转换间隔定时度量中的噪音并较大地独立于模式的尺寸。 Some factors, such as media noise and electronic noise determines the interval timer metric conversion noise and largely independent of the model size. 这个噪音在本讨论中认为是一个常数。 The noise in this discussion considered a constant. 由于求平均值,所测量转换的数目影响到定位信号噪音。 Due to averaging, number of the measured positioning signal converted to noise. 在图9所示的模式94中,每次采样测量四个A和B间隔。 In the pattern 94 shown in FIG. 9, the measurement of each sample A and four B intervals. 在译码器中,对这四次测量求平均值以产生这次采样的定位信号。 In the decoder, these four measurements are averaged to generate the sampled position signal. 在包含更多条并因此在模式中有更多的转换的情况下,可通过增加平均值来降低噪音,但这将需要一个较长的模式,这又降低了采样频率。 Under section contains more and so there is more in the case of conversion mode, can be reduced by increasing the average value of the noise, but it will require a longer pattern, which in turn reduces the sampling frequency. 把间隔定时转换到定位信号的换算系数由条的倾斜度得出。 The interval timer switch to the positioning signal conversion factor derived from the tilt bar.

随着条转换同伺服磁道中心线垂直方位倾斜的增大,转换之间的定时随伺服头的位置变化也更大。 With the servo track bar conversion with oblique vertical centerline increases, the timing of the conversion between the servo head with the position change is greater. 这些较大的定时差别降低了定位信号中的噪音。 These larger timing differences to reduce noise in the positioning signal. 然而增大的倾斜度也使得伺服模式变长了。 However, increasing slope also makes the servo pattern becomes longer. 降低了采样频率。 Reducing the sampling frequency. 应该注意,增大的倾斜度由于方位角的损失削弱了来自伺服读头的信号强度。 It should be noted, increasing slope weakened due to azimuth loss signal strength from the servo read head. 当确定用于一个给定应用场合的最优伺服模式时应考虑所有这些因素。 When it is determined for a given application of the optimal servo pattern should consider all these factors. 图9中所示的模式94表示了一个最佳设计,但是,熟练的技术人员可通过调整模式的布局和尺寸容易提出不同目标的设计。 Mode 94 shown in FIG. 9 shows a preferred design, however, skilled in the art by adjusting the pattern layout and dimensions of the design is easy to make different targets.

图10,11和12给出了图2中所示信号译码器36的框图。 Figures 10, 11 and 12 shows a block diagram of signal decoder 36 shown in FIG 2. 由下面的进一步描述,译码器最好包含差错检测和校正电路。 By further described below, the decoder preferably includes error detection and correction circuit. 熟练的技术人员会懂得这两个功能可由同一电路提供或由分开的电路模块提供。 Skilled in the art will appreciate that these two functions may be provided by the same circuit, or provided separately from the circuit module. 图10所示译码器36通过线34接收如图7所示来自伺服读头的模拟伺服读头信号并使用峰值检测器102把这个信号转化为脉冲逻辑信号。 36 receives via line 34 as shown in the decoder 10 shown in FIG analog servo read head from the servo read head signal shown in Figure 7, using a peak detector 102 the signal is converted into a logic pulse signal. 在最佳实施方式中,峰值检测器的输出信号在一个正向转换时(前沿)升高而在负向转换时降低,以使得译码器区分两个极性。 In the preferred embodiment, the output signal of the peak detector decreases when the negative conversion in a forward conversion (front) increase, so that the decoder to distinguish between the two polarities.

如上所述,定位信号由一个数字信号译码器36(图2)进行译码。 As described above, the positioning signal by a digital signal decoder 36 (FIG. 2) for decoding. 译码器的功能是测量A和B的时间间隔并进行必要的计算以使得定位信号可用于伺服控制系统的其余部分。 Decoder function is to measure the time interval between A and B and perform the necessary calculations to locate such a signal can be used for the remainder of the servo control system. 此外,差错检测和校正可在译码器内实施。 In addition, error detection and correction may be implemented within the decoder. 熟练的技术人员会认识到虽然译码的设计和操作必须适于所用的特定伺服磁道,但有许多通过不同硬件和软件的方法完成这项功能。 The skilled artisan will recognize that although the decoding must be adapted to the design and operation of the particular servo track, but there are many ways to accomplish this function through different hardware and software. 为了图示的目的,图10和11表示了一个用于图4所示条简单模式所用的译码器和差错校正电路。 For purposes of illustration, Figures 10 and 11 shows a decoder and an error correction circuit shown in FIG. 4 bar used for the simple mode.

图7表示作为读取图4所示模式的结果从一个伺服读头得到的模拟信号。 Figure 7 shows the analog signal as a result of the pattern shown in Figure 4 to read from a servo read head obtained. 如图10所示,这个模拟信号由一个峰值检测器102转化为一个数字信号。 Shown in Figure 10, the analog signal by a peak detector 102 is converted to a digital signal. 峰值检测器的输出在检测到正峰值时由逻辑“低”变为逻辑“高”,在负峰值时由“低”变为“高”。 The output of the peak detector detects the positive peaks from logic "low" to logic "high", when the negative peak value from "low" to "high." 译码器被设计为仅从峰值的一个极性来触发所有的间隔定时,这个极性与前面讨论的磁转换的一个单个极性相一致。 The decoder is designed to only one polarity to trigger all the peak interval timer, a single polarity of the polarity of the magnetic transitions consistent with previously discussed.

在译码器中,一些计数器用作同步和间隔定时的定时器。 In the decoder, the number of counters used for timing synchronization and interval timer. 一个开始计数器104通过寻找比在一个脉冲串中所允许的最大值还长的无转换间隔来检测起始间隙70(见图4)。 A start counter 104 by looking at the ratio of the maximum value allowed in a burst also no longer switch interval to detect the start gap 70 (see FIG. 4). 当检测到一个起始间隙后,重置同步和控制电路111以开始译码下一个新的脉冲串。 When a start gap is detected, synchronization and control circuit 111 resets to begin decoding the next new burst. 每遇到伺服模式中的一个峰值,即激励并重置适当的计数器对适当的A和B间隔定时。 Each encounter servo mode peak that appropriate incentives and reset the counter on the appropriate interval timer A and B. 一个单个的“X”计数器106定时每个A间隔。 A single "X" counter 106 times each A interval. 因为连续的B间隔是邻接的,并且输出计数器的和与重置计数器需要一定的时间,所以两个“Y”计数器Y1 108和Y2 110交替地对B间隔定时。 Because consecutive B intervals are contiguous, and the output of the counter and reset the counter and will take some time, so the two "Y" counters Y1 108 and Y2 110 alternate B timing interval. 所期望的定位信号是A和B的比率,它由以下的示例电路计算:因为全数字除法操作需要庞大的电路,当B值的要求范围较小时(假定带速在一限定范围内变化),使用一个带有ROM查询表的乘法器是有益的。 Desired position signal is the ratio of A and B, which consists of the following calculation example circuit: Because full digital division operation requires huge circuit, when the desired range B values is small (assuming tape speed vary within a defined range), Use multiplier with a ROM lookup table is useful. B的值(两个Y计数器之一的输出)由一个Y1/Y2计数器选择器112选择并通过一个ROM查询表116转化为一个1/B值,ROM查询表的输出在一个乘法器114中与A相乘。 The value of B (Y counter one of two output) by a Y1 / Y2 counter selector to select 112 and 116 via a ROM lookup table is transformed into a 1 / B value, the output ROM lookup table in a multiplier 114 and A multiplied. 这样,原始定位信号118包含每对A和B值完成时的值A/B(每个脉冲串中有8次)。 Thus, the raw position signal 118 comprises the value of each of A and B is completed when the value of A / B (each burst is 8 times).

图11给出了一个同图10中所示译码器一起使用的实际差错检测和校正电路的框图。 Figure 11 shows a block diagram of the actual error detection and correction circuit with a decoder shown in Fig. 10 for use together. 图示电路对每个脉冲串处执行差错检测,并为每个脉冲串输出一个单个的定位信号。 Illustrated circuit performs error detection for each burst at a single location and outputting a signal for each burst. 在没有发现差错的情况下,脉冲串的输出为在脉冲串中发现的八个单独A/B值的平均值。 Average of eight individual A did not find an error in the case where the burst is found in the output of burst / B values. 如果检测到了一个差错,一个简单的方法是用最近的无差错值替换当前的错误脉冲串输出值。 If it detects an error, a simple method is to replace the current output error bursts with the latest error value. 这些功能如下完成:一个转换计数器120对每个脉冲串中出现的转换进行计数。 These functions are accomplished as follows: A transition counter 120 counts the conversion occurring in each burst. 根据实验确定,大部分差错包括偶尔检测到一个额外转换,或漏检一个合法转换,都是由于噪音,遗漏,碎屑或其它原因造成。 Determined experimentally, including most of the errors detected occasionally an extra conversion, or missed a legitimate conversion, are due to noise, omissions, debris, or other causes. 当这些错误发生时,转换计数器将每个脉冲串的转换数计数非正确数目(本例中为18),并将输出一个差错信号。 When these errors occur, the counter conversion converts the number of each burst count incorrect number (in this case 18), and outputs an error signal. 附加的差错检测通过比较在所述脉冲串中产生的八个A/B值的连续值来完成。 Additional error detection by comparing successive values of said pulse train generated at eight A / B values to complete. 一个偏差累加器124对八个A/B值中的四个求和并减去剩余的四个,给出一个指示八个值的不等性程度的偏差结果。 A deviation accumulator 124 pairs of the eight A / B values, and subtracts the remaining four summation four, eight values gives an indication of the degree of deviation of the results of ranging. 如果这个偏差值超过了一个预定的界限,一个偏差限检测器126产生一个错误信号。 If this deviation exceeds a predetermined limit, a deviation limits detector 126 produces an error signal. 这些差错信号由一个差错门/控制逻辑121处理,当没有检测到差错时,这个逻辑在线122上产生一个脉冲串数据准备好信号以发出脉冲串来指示来自脉冲串平均累加器128的正确脉冲串数据的可用性。 The error signal from an error gate / control logic 121 processes, when no error is detected, generating a burst data ready signal on the line 122 to issue logic to indicate the correct pulse bursts from the burst average accumulator 128 string data availability. 如果检测到一个差错,新的脉冲串平均数据被拒绝,并用最新的无差错值替换,这由一个锁存器完成,它把最新的来自累加器128的正确脉冲串平均值提供给一个数据选择器132。 If an error is detected, the new burst average data is rejected and replaced with the latest error value, which is done by a latch, it is the average of the latest correct bursts from the accumulator 128 is supplied to a data selection 132. 一条脉冲串差错线123指示当前输出值是一个新的无差错值还是一个以前保存的值。 A burst error line 123 indicates that the current output value is a new error-free value or a previously saved values.

伺服控制系统利用脉冲串差错线123和脉冲串数据准备好线122来确定定位信号的完整性对于精确的伺服控制操作是否充分。 Servo control system uses a burst error line 123 and burst data ready line 122 to determine the integrity of the positioning signals for precise servo control operation is sufficient. 例如,在检测到一定数目连续的差错后或超过一预定时间间隔后还没有新的无差错数据,则系统会拒绝定位数据。 For example, after detecting a certain number of consecutive errors or exceeds a predetermined time no new error-free data interval, the system will reject the positioning data. 当出现这种错误状态时,系统将选择接收来自另一冗余伺服磁道的定位信号数据,或者如果没有伺服磁道产生无差错数据,则系统可能禁止写数据,以避免在磁道外写新数据和意外地擦除邻近磁道上的数据的可能性。 When this error state, the system will choose to receive a positioning signal data from another redundant servo track, or if there is no servo tracks produce error-free data, the system may prohibit write data to avoid writing new data and track outside possibility of accidental erasure of data on adjacent tracks. 图12图示了这样一种结构。 Figure 12 illustrates such a structure.

图11所示的电路在检测到一个差错时可仅通过以最新无差错值的替换来完成差错校正。 Circuit shown in Fig. 11 when an error is detected can be replaced with the latest error-free value of the error correction accomplished by only. 熟练的技术人员可了解到其它算法,如一个估计的当前值的替换,会给伺服控制系统带来一定的好处。 Skilled staff can understand other algorithms, such as an estimate to replace the current value of the servo control system will bring some benefits.

图12给出了用来确定脉冲串数据信号应被认为是合法还是非法的鉴别器电路140的框图。 Figure 12 shows the data used to determine the burst signal to be considered as legal or illegal block diagram of a discriminator circuit 140. 一个超时定时器142和一个连续差错计数器144从线122上接收脉冲串数据准备好信号。 A timer 142 and error counter 144 receives a continuous burst data from the ready signal line 122. 脉冲串差错确定信号从一个如图11所示的差错门/控制电路接收。 Burst error is determined from a signal 11 shown in FIG error gate / control circuit receives. 如果超时定时器在一预定时间间隔内没有收到一个无差错伺服脉冲串信号,则超时定时器向一个差错门146提供一个差错信号。 If the timer does not receive an error-free servo burst signal within a predetermined time interval, the timer provides an error signal to an error gate 146. 如连续差错计数器144发现预定数目的连续脉冲串中有错,则向差错门提供一个差错信号。 As found in the continuous error counter 144 a predetermined number of successive bursts are wrong, then provide an error signal to the error gate. 如超时定时器和连续差错计数器都没有向差错门指示一个差错,则认为译码信号是合法的。 Such as timer and continuous error counters are not indicate an error to the error gate, then that decoded signal is legal. 于是一个锁存器148把一个数据合法信号150设置为高电平,指示一个合法输出。 Thus a data latch 148 a legitimate signal 150 is set high, indicating a valid output.

图10-12中描述的译码器是图示基于定时的伺服模式译码的和差错检测与校正的原理的一种相对简单的形式。 The decoder described in FIGS. 10-12 is shown, and based on an error detection and correction of the timing of the principles of the servo pattern decoding relatively simple form. 本发明的最佳实施方式使用图9所示的交错模式,这种方式已经为得到宽伺服磁道宽度,高信噪比,高采样频率和良好的差错检测能力的综合性能而最优化。 Preferred embodiment of the present invention uses interleaved pattern shown in Fig. 9, in this way already get wide servo track width, high SNR overall performance, high sampling frequency and good error detection capability and optimized.

图13-16中以框图的形式图示了根据本发明构造的一个译码器的最佳实施方式。 Figure 13-16 illustrates in block diagram form a preferred embodiment of the decoder according to the present invention is constructed of. 图17给出了在图9所示伺服模式的一部分之上的一个伺服读头的路径,还有由此产生的被伺服读头接收的模拟信号以及被定时的A和B间隔。 Figure 17 shows the path of a servo read head over a portion of the servo pattern shown in Figure 9, as well as the analog servo read head signal is received by the resulting timing and the A and B intervals. 模式由交替的四个和五个交错菱形的脉冲串组成,它们之间由起始间隙分开,在起始间隙的最窄处的长度大于在脉冲串内遇到的任何间隙的长度。 Pattern consists of alternating four and five interleaved burst diamond composition, separated from the starting gap between them, the length of the narrowest point of the gap is greater than the initial length of any gaps encountered within bursts. 这个由可识别的间隙分开的四个和五个条的交替组的组合为译码器提供周期性同步信息。 This gap can be identified by a combination of four and five separate strips of alternating groups provide periodic synchronization information for the decoder. 因为将被定时的间隔是交替的并且在B间隔的情况下间隔是连续的,译码器被分为两个由后缀“1”或“2”标识的子译码器,它们交替产生定位信号信息,每个信息隔一个输出定位信号值。 Because the intervals to be timed are interleaved and, in the case of B intervals are contiguous intervals, the decoder is divided into two by the suffix "1" or "2" sub-decoders identified, they are alternately generated positioning signal information, each information across a positioning signal output value. 每个子译码器定时四个A和四个B间隔,如图17所示。 Each sub-decoder timing four A and four B intervals, shown in Figure 17. 图17中标以CLR1,CLR2,OUT1和OUT2的定时点指示每个子译码器被清零和产生一个定位信号值的时间点。 Figure 17 are denoted with the CLR1, CLR2, OUT1 and OUT2 of the timing point indicating each sub-decoder is cleared and the time to produce a position signal point value. 包括间隔定时电路和差错检测电路的子译码器的主电路,在图13-16中示出。 Including sub-decoder circuit and the error detection interval timer circuit main circuit, is shown in Figures 13-16. 所示的电路包括差错检测,但不包括差错校正,这个问题交给伺服控制器用类似上面讨论的原理解决。 The circuit shown includes error detection, but does not include error correction, the issue to the servo controller with the principles discussed above to solve similar. 同样,在这个译码器中没有计算A/B的商,伺服控制器执行这个功能。 Similarly, there is no calculation of A / B quotient, the servo controller performs this function in the decoder. 熟练的技术人员可联系这些描述很容易地确定这一电路的细节。 Skilled artisans may contact those described readily determined by the details of this circuit.

虽然交错的A和B间隔可由各自专用的计数器定时,同样的功能还可由每个子译码器中单个的累加器来执行。 While the interleaved A and B intervals timed by respective dedicated counters, the same function can also be performed by each sub-decoder in a single accumulator. 例如,第一个子译码器中A值的定时如下完成:一个X1累加器(由CLR1)初始时清零为零值。 For example, the timing of the first sub-decoder A values are complete: an X1 accumulator (by CLR1) initially cleared to zero value. 一个转换计数器TC1在伺服模式内一直跟踪头的位置(由越过多少条来确定)。 A counter TC1 in servo mode has been tracking the head position (determined by how many crossed) conversion. 当模式的位置在A间隔之外时,一个增量ROM X1产生一个零值送给累加器X1,保持它的值为零。 When the interval A beyond the position mode, an increment ROM X1 accumulator produces a value of zero to the X1, holding its value is zero. 在其它时间点,转换计数器TC1和增量ROM X1向累加器X1提供一个等于当前被定时的A间隔数的增量值。 In other time points, the conversion counter TC1 and increment ROM X1 provide to the X1 accumulator an increment value equal to the number of the current A is timed intervals. 累加器X1在每个时钟周期把这个数加到总和中。 X1 accumulator in each clock cycle number is added to the total. 用这种方法累加器X1用作多路并行定时器。 In this way the accumulator X1 is used as multiple parallel timers.

应该注意,累加器X1在间隔完成之后含有四个A值的和,这是用于脉冲串组的所期望的A输出值。 It should be noted, the X1 accumulator after completion of the interval and contains four A values, which is used to set the burst A desired output value. 与上面所描述的方式相似,一个Y1累加器对四个B间隔求和。 Similar manner as described above, a Y1 accumulator sum the four B intervals. 一个偏差累加器D1以这样的方式交替地对A和B间隔进行加减以使得如果所有A间隔有相同的长度并且所有B间隔有相同的长度时它的和为零。 A deviation accumulator D1 alternately in such a manner on the A and B intervals and subtraction so that if all A intervals have the same length and all B intervals have the same length it is zero. 当这些相等性保持不住时,D1累加器中的和就不等于零。 When they could not maintain equality, D1 accumulator and not equal to zero. 标以DEV MAX和DEV MIN的比较器判断这个偏差是否超出了标示一个错误状态的预定界限。 Labeled DEV MAX and DEV MIN comparator to determine whether the deviation exceeds a predetermined mark an error state boundaries. 差错检查也包括转换计数,它由两个幅值比较器1和2完成。 Error checking also includes a conversion count, which is completed by two magnitude comparators 1 and 2. 因为每个子译码器的所期望的转换总数(13或14)是不同的,所以为每个子译码器提供独立的计数器和幅值检查器。 Since each sub-decoder converts the desired total number (13 or 14) are different, so the separate counters and magnitude checkers for each sub-decoder. 由SE-LECT信号来确定当前选择使用哪个子译码器。 By SE-LECT signal to determine the current select which sub-decoders. 这个信号及图13中其它信号将联系图14-16来进行描述。 This signal, and other signals in Fig. 13 will be described in connection with Figures 14-16.

图13中所示DATA GOOD信号指示在DATA READY脉冲(图16)发生时对于在XOUT和YOUT数据线上正处理的值讲,转换计数器TC1,TC2或偏差限制电路DEV MAX和DEV MIN是否检测到一个差错状态。 DATA GOOD signal shown in Fig. 13 indicates the DATA READY pulse (Fig. 16) occurs for a value in the XOUT and YOUT data lines being processed speaking, transition counter TC1, TC2 or the deviation limit circuits DEV MAX and DEV MIN is detected an error state. DATA GOOD线的状态被伺服控制器用于差错校正。 State DATA GOOD line is used for error correction servo controller.

图14图示了PK信号和三个称作GAP,FOUR和FIVE的其它中间信号的产生。 Figure 14 illustrates the generation PK signal and the three other intermediate signals called GAP, FOUR, and FIVE are. PK信号由一个典型的用于磁盘和带驱动器中把模拟信号转化为数字脉冲的常规峰值检测器160产生。 PK signal is used by a typical tape drive disks and the analog signal into digital pulses of a conventional peak detector 160 generates. 峰值检测器160与用在常规驱动器的检测器有所不同,它仅在正向峰值时产生脉冲。 The peak detector 160 used in the conventional drive detector is different, it generates a pulse only in the forward peak. 用于磁驱动器中的典型峰值检测器通常在正向和负向峰值时都产生脉冲。 Magnetic drive for a typical peak detector is usually positive and negative peak pulses are generated. 熟练的技术人员对最佳实施方式中的峰值检测器160应该非常了解,并且不需要进一步解释。 Skilled in the art of the preferred embodiment of the peak detector 160 should be well aware of, and does not require further explanation.

峰值检测器的输出包含提供给图13中所示电路及下行计数器162的PK信号。 Peak detector output is supplied to a circuit comprising a counter and a downlink signal PK 162 shown in Fig 13. 下行计数器还接收来自一个系统时钟的时钟信号163,同时接收一个可由用户预定为一个预定值的长度信号GAP,例如此预定值对应于图9所示菱形中条间的分隔。 Downlink counter also receives a clock signal from a system clock 163, while receiving a predetermined by the user for a predetermined length of the signal value of GAP, for example this value corresponds to a predetermined bar shown in the partition between the diamond 9 in Fig. 一个GAP信号包含一个脉冲,此脉冲是当检测到一个时间间隔超出了一个预定间隔长度而没有来自峰值检测器160的脉冲时,由下行计数器所产生的。 A GAP signal comprises a pulse, when the pulse is detected a time interval exceeds a predetermined gap length without a pulse from the peak detector 160 when generated by the down counter. 也就是说,如果在间隙长度时间后没有检测到PK脉冲,则下行计数器超时或计数到零。 That is, if the gap length of time after no PK pulse is detected, then the down counter times out, or counts down to zero. 对一给定的带速和伺服模式大小,应选择一个合适的间隙时间界限。 For a given size with speed and servo pattern, you should choose a suitable gap time limits. 在最佳实施方式中,带速大约每秒2.0米,模式包含的四和五条组相隔5um,最佳时间界限选为3.75。 In the preferred embodiment, the tape speed is about 2.0 meters per second, containing four and five pattern groups separated 5um, preferably 3.75 optimal time limit. mesc。 mesc. 结果,产生的GAP信号在四和五伺服条组之间的每一个间隙处包含一个脉冲。 Results, GAP signal comprises a pulse at each gap between the groups of four and five servo strips. 如上边提到,基于对所遇菱形条的数目的跟踪可以很容易地区分空闲间隔99(图9)和模式内间隔98。 As noted above, can easily be based on the number of encountered diamond strip tracking distinguish idle interval 99 (FIG. 9) and the spacer 98 within the pattern. 这一点将在下面进一步描述。 This point will be further described below.

PK信号和GAP信号用来分别产生FOUR和FIVE信号。 PK signal and the GAP signal is used to generate FOUR and FIVE signal. 当在一个模式间隙后检测到四个伺服模式条时,FOUR信号变高。 When, after a gap detection mode to four servo pattern stripe, FOUR signal goes high. 当在一个间隙后检测到五个伺服模式条时FIVE信号变高。 When a gap is detected after five servo pattern stripes FIVE signal goes high. 上行计数器164在时钟输入处接收PK信号,在清零输入端处接受GAP信号,上行计数器把它的输出提供给3-8译码器的输入线,3-8译码器以一种熟练的技术人员所熟悉的方式产生FOUR和FIVE脉冲信号。 PK counter 164 receives the uplink signal at the clock input, the clear signal at the input to accept GAP, up counter provides its output to the input line of the decoder 3-8, 3-8 in a decoder skilled technician familiar way to produce FOUR and FIVE pulse signals.

图15表示如何使用FOUR,FIVE和GAP信号来产生主控信号OUT1,OUT2,CLR1和CLR2。 Figure 15 shows how to use FOUR, FIVE, and GAP signal to generate a master signal OUT1, OUT2, CLR1 and CLR2. 对于图9所示的模式,在每个空闲间隔99处产生OUT1和OUT2信号,而在内部间隙98处产生CLR1和CLR2信号。 For the pattern shown in Figure 9, each idle interval 99 to generate signals OUT1 and OUT2, CLR1 and CLR2 signals generated within the gap 98. 一个触发器阵列同两个或门一起使用来产生控制信号。 A flip-flop array with two OR gates to generate a control signal used together. GAP信号提供给四个触发器172,176,178,188的时钟输入。 GAP signal is provided to the clock input of four flip-flops 172,176,178,188. 反向的FIVE信号提供给第一个触发器172和一个或门174。 Inverse FIVE signal is provided to a first flip-flop 172 and an OR gate 174. 无论何时在两个FIVE脉冲后检测到一个间隙,OUT1信号产生一个单个脉冲。 Whenever two FIVE pulses detected after a gap, OUT1 signal produces a single pulse. 这样,第一个触发器172的Q输出作用或门174的另一个输入,这个或门的输出提供给第三个触发器178的D输入线,第一个触发器172的反向Q输出提供给第四个触发器180作为时钟输入。 Thus, the Q output of the first flip-flop effect or other input 172 of gate 174, the output of OR gate is provided to a third flip-flop 178 D-input line, the first inverted Q output of flip-flop 172 is provided to a fourth flip-flop 180 as the clock input. 第四个触发器的输入接地。 The fourth ground trigger input. 第五个触发器182接收第三个触发器178的Q输出信号,同时接收系统时钟信号作为它的时钟输入。 The fifth flip-flop 182 receives the third flip-flop 178 Q output signal and the receiver system clock signal as its clock input. 第五个触发器从它的反向Q输出线产生OUT1信号。 The fifth flip-flop produces OUT1 signal from its inverse Q output line.

当恰好在一个FIVE信号脉冲之后检测到一个GAP信号时CLR2线产生一个信号脉冲。 When exactly one FIVE signal pulse after the detection of a GAP signal CLR2 line produces a signal pulse. 于是第六个触发器184的D输出线接收第四个触发器180的Q输出,并在它的时钟输入端接受系统时钟信号,第六个触发器190的反向Q输出提供CLR2信号。 Thus the sixth D flip-flop output line 184 receives the Q output of the fourth flip-flop 180, and its clock input supplied with the system clock signal, the inverted Q output of the sixth flip-flop 190 is provided CLR2 signal.

当在两个FOUR信号之后出现一个GAP信号时OUT2信号线产生一个信号脉冲,而OUT1线在恰好一个FOUR信号之后出现一个GAP信号时产生一个脉冲信号。 Generating a pulse signal when a GAP signal occurs after two FOUR signals OUT2 signal line produces a signal pulse, and the OUT1 line A GAP signal after exactly one FOUR signal. 如图15所示,这可通过把反向的FOUR信号连到或门186的一个输入端和第二个触发器176的D输入端来提供。 As shown in Figure 15, which can be connected to inverted FOUR signal to one input terminal of AND gate 186 and the D input terminal of the second flip-flop 176 is provided. 第二个触发器176的输出端Q提供给或门186的另一输入线。 The second flip-flop output terminal Q 176 is supplied to the other input line or gate 186. 或门的输出作为第七个触发器188的D输入。 As the output of OR gate 188 of the seventh D flip-flop input. GAP信号作为第七个触发器的时钟输入。 GAP trigger signal input as the seventh clock. 第七个触发器188的Q输出作为第八个触发器190的D输入,第11个触发器在它的时钟输入线接收系统时钟信号。 Seventh flip-flop 188 and the Q output of D flip-flop as an eighth input 190, the first flip-flop 11 receives a system clock signal at its clock input line. 第八个触发器190的反向Q输出产生OUT2信号。 Q output of flip-flop reverse eighth generation 190 OUT2 signal.

CLR1信号由第九个触发器192产生,它的D输入接地且时钟输入端接收第二触发器176的反向Q输出。 CLR1 signal 192 is generated by the ninth flip-flops, it's D input to ground and the clock input for receiving a reverse Q output of the second flip-flop 176. 第九个触发器的Q输出提供给第十个触发器194的D输入端。 Q output of the flip-flop of the ninth to the tenth D input of the flip-flop 194. 第十个触发器在它的时钟输入线接收系统时钟信号。 Tenth flip-flop receives the system clock signal at its clock input line. 第十个触发器194的反向Q输出包括CLR1信号。 Q output of flip-flop tenth reverse 194 includes CLR1 signal.

图16图示了如何产生一个SELECT信号和一个数据准备好(DR)信号。 Figure 16 illustrates how to generate a SELECT signal and a data-ready (DR) signal. 当一个OUT1和OUT2信号脉冲出现时,数据已准备好可以输出。 When a OUT1 and OUT2 signal pulse occurs, data is ready to be output. 也就是说,伺服头位于一个菱形模式的末端,也即或是一组四个交错的菱形或是一组五个交错的菱形。 That is, the servo head is located at one end of the diamond-shaped pattern, i.e., either a group of four interleaved diamonds or a group of five interleaved diamonds. SELECT信号用来选择适当的寄存器和数据准备好脉冲。 SELECT signal is used to select the appropriate registers and data ready pulses. SELECT信号从一个JK触发器196产生,它的J输入端连接到OUT2信号,K输入端连接到OUT1信号。 SELECT signal is generated from a JK flip-flop 196, which is connected to the input of J OUT2 signal, K input connected to OUT1 signal. JK触发器的时钟输入端连接到系统时钟信号。 JK flip-flop clock inputs connected to the system clock signal. JK触发器196的Q输出端产生SELECT信号。 Q output of the JK flip-flop 196 SELECT signal is generated. OUT1和OUT2信号连接到一个或门198的输入线,或门的输出端产生数据准备好(DR)信号。 OUT1 and OUT2 signals are connected to an OR gate 198 to the input line, or the output of AND gate produces data ready (DR) signal.

有关图9所示交错菱形模式的定位信号的产生可参照下列附图可以更好地理解:图13显示定位信号产生的逻辑电路;图17表示交错菱形模式和输出信号;图18显示输出信号和清零信号产生的一张列表。 For Figure 9 shows the interleaved diamond pattern generating positioning signals can be better understood from the following with reference to the accompanying drawings:; FIG. 17 shows the interleaved diamond pattern and output signal; Figure 13 shows the positioning signal generated by the logic circuit, and FIG. 18 shows the output signal clear signal generated by a list. 如图13所示,定位信号包含指定的XOUT和YOUT的交替值。 As shown in Figure 13, the positioning signal comprises alternating values designated XOUT and YOUT are. 如上面提到的,图13表示出由后缀“1”和“2”区分的完整的冗余信号产生系统,它们轮流产生XOUT和YOUT值。 As mentioned above, Figure 13 shows a complete redundant signal by the suffix "1" and "2" to distinguish the generating system, which in turn generates XOUT and YOUT values. 这样,X1部分产生一个XOUT值,随后Y1部分产生一个YOUT值,然后X2部分产生下一个XOUT值,Y2产生下一个YOUT值,X1部分又产生下一个XOUT值,等等。 Thus, X1 section generates a XOUT value, followed by a YOUT value generating portion Y1, X2 and then generate the next XOUT value portion, Y2 generate the next YOUT value, X1 part and generate the next XOUT value, and so on. 值的序列构成定位信号。 Sequence values constituting the positioning signal. 对电路操作的描述最初将仅涉及由后缀″1″标示的第一个冗余信号生成系统。 Description of the operation of the circuit will initially involve only by the suffix "1" indicated the first redundant signal generation systems.

定位信号由上面参照图4-6和图8,图9所描述的四个A间隔的和除以四个B间隔的和得到。 Positioning signals from the above with reference to Figure 4-6 and Figure 8, the four A intervals as described in FIG. 9 and is divided by four B intervals and obtained. 图13所示的累加器X1,X2,Y1和Y2可用下法完成这个除法:或将A乘B的倒数后再将商数相加,或先计算和然后执行除法操作,从而以产生XOUT和YOUT值。 X1 accumulator shown in Figure 13, X2, Y1 and Y2 can be used to accomplish this division purgation: A or B is then multiplied by the reciprocal of the quotient are added, or calculated first and then perform the division operation, to generate the XOUT and thereby YOUT value. A间隔和B间隔在图17中用图形表示。 A intervals and B intervals in Fig. 17 by a graphical representation.

图17表示A间隔A1,A2,A3和A4在时间上相互重叠,相应的B间隔B1,B2,B3和B4也是这样。 Figure 17 shows A intervals A1, A2, A3, and A4 overlap one another in time, the corresponding B intervals B1, B2, B3 and B4 as well. 可以用一个独立的计数器给每个A和B间隔定时,但这种方法需要八个计数器。 Can use a separate counter for each A and B interval timer, but this method requires eight counter. 如上面所述,在最佳实施方式中,可使用两个带有成对累加器的并行信号生成系统来替代而求得总和。 As described above, in the preferred embodiment, using two parallel signal generation systems having paired accumulators to replace and obtain the sum. 如图13所示,第一个信号生成系统包含两对成对累加器X1和Y1,同时第二个信号生成系统包含两对成对累加器X2和Y2。 13, the first signal generation system includes two paired accumulators X1 and Y1, while the second signal generation system includes two paired accumulators X2 and Y2. 每个累加器具有“清零”和“增量”两根输入线,应该知道每个累加器还接收时钟输入(未示出),在每个时钟周期,累加器把从增量ROM(标记为INC ROM)得到的增量值加到数据输出信号上。 Each accumulator has the "clear" and "incremental" two input lines, should know that each accumulator also receives a clock input (not shown), in each clock cycle, the accumulator to the increment ROM (mark increment INC ROM) obtained value is added to the data output signal. 每个累加器根据伺服头刚刚越过的伺服模式条数增加一个增量0,1,2,3或4。 Each accumulator according to an incremental increase in the servo head just over the number of servo pattern 0,1,2,3 or 4. 各个信号生成系统的清零线(CLR1或CLR2)分别将累加器的输出重置为零。 Each signal generation system clear line (CLR1 or CLR2) respectively accumulator output is reset to zero. 累加器从增量ROM得到它们的递增指令,即每个时钟周期要加的值,增量ROM接着被转换计数器TC1和TC2访问。 Accumulators get their increment from an incremental ROM instruction that each clock cycle to add value increment ROM then converted counter TC1 and TC2 access.

在操作中,当出现一个CLR1脉冲时,第一个转换计数器TC2重置为零,并且与它相关联的累加器X1,Y1和D1也重置为零。 In operation, when there is a CLR1 pulse, the first conversion TC2 counter is reset to zero, and it is associated with the accumulator X1, Y1, and D1 is also reset to zero. 如图17所示,随着伺服头在CLR1脉冲后沿伺服模式移动,它越过一个四个伺服模式条的组,然后越过两个五个条的组,转换计数器计数峰值(PK)脉冲以记录已越过了多少伺服模式条。 17, as the servo head moves along the servo pattern after the CLR1 pulse, it across a group of four servo pattern stripes, then crossed two groups of five bars, the conversion counter peak (PK) pulses to record How much has crossed the servo pattern stripe. 在CLR1信号之后收到第一个PK脉冲时,系统开始为第一个B间隔计时。 Upon receipt of the first PK pulse after CLR1 signal, the system starts for the first B interval timing. 在第二个PK脉冲,开始为第二个B间隔计时,依次类推。 In the second PK pulse, the start of the second B interval timing begins, and so on. 在CLR1信号之后的第六个PK脉冲,开始为第一个A间隔计时。 After CLR1 signal sixth PK pulse, the start of the first A interval timing. 在第七个PK脉冲,开始为第二个A间隔计时,这样持续到CLR1信号后的第十一个PK脉冲,表示越过第十一个伺服模式条,第一个A间隔和第一个B间隔计时结束。 In the seventh PK pulse, the start of the second A interval timing, so that until the eleventh PK pulse after the CLR1 signal, represents the eleventh servo pattern stripe crossed, the first A interval and the first B end of the interval timer. 在到CLR1后的第十四个PK脉冲时,所有的A和B间隔结束并且准备好输出总和。 When the fourteenth PK pulse after the CLR1, all A and B intervals and ready to output the sum of the end. 在一对五条组之后当出现OUT1脉冲时,第十四伺服模式条产生一个输出值(图15)。 After a group of five when there OUT1 pulse, the fourteenth servo pattern stripe generate an output value (Figure 15).

使用增量ROM中增量数据的累加器自动地按需要加上间隔。 Incremental incremental data accumulator ROM automatically add intervals as needed. 图18表示存贮在各自增量ROM中的增量数据。 Figure 18 shows the ROM stored in the respective increment increment data. 图18中AD-DRESS列是指示在相关CLR1或CLR2信号之后哪个伺服模式条刚被越过的转换计数器输出值。 Figure 18 AD-DRESS column indicating the conversion counter output value after the relevant signal CLR1 or CLR2 which had just crossed the servo pattern stripe. X1,X2,...,D2列表示在每个时钟周期将加到图1 3的各个相应的累加器的增量值。 X1, X2, ..., D2 column indicates at each clock cycle is added to each of the respective incremental value graph 13 of the accumulator. 应注意地址是相应清零信号之后的PK脉冲数。 PK should be noted that the number of pulses corresponding address clear signal after. 这样X1列的增量值根据一个CLR1信号之后收到的PK脉冲数来寻址,而X2列的增量值根据一个CLR2信号后收到的PK脉冲来寻址。 Such incremental value X1 column PK according to the number of pulses received after a CLR1 signal is addressed and the incremental value X2 columns according to PK pulse signal is received after a CLR2 addressed.

下面将从更多的细节上描述累加器X1的操作。 The following will describe the operation of the X1 accumulator more detail. 其它的累加器以同样的方式工作。 Other accumulator in the same manner. 由图17应该很清楚,在一个CLR1信号后越过的第六个伺服模式条开始了一个五条菱形的第一个A间隔定时,这一点可由对伺服模式条、头输出模拟信号和第二组A间隔的检查中看出。 It should be clear from Figure 17, after a signal across CLR1 sixth servo pattern stripe started the first of a five diamond A interval timer, which is evidenced by the servo pattern stripes, the head output analog signal and the second group A inspection interval seen. 这样,转换计数器TC中由计数PK脉冲产生的输出值等于6并且相应增量ROM的地址等于6。 Thus, the output value of the conversion counter TC by counting PK pulses is equal to 6 and the corresponding increment ROM address is equal to 6. 由图18,累加器X1的增量数为一。 From Figure 18, the number of increments the X1 accumulator is one.

在CLR1信号后的第七个PK脉冲,第一个A间隔继续计时,同时第二个A间隔开始计时。 In the seventh PK pulse after the CLR1 signal, the first A interval continues timing, while the second A interval timing begins. 因此,在指示越过第七条伺服模式条的第七个脉冲后,ROM的地址为七并且由图18很清楚累加器X1在每个时钟周期递增2。 Therefore, after the instruction across the seventh pulse Article servo pattern strip, ROM address is seven and it is clear from Figure 18 accumulator X1 increments two on each clock cycle. 在越过第八个伺服模式条后,三个A间隔A1,A2和A3同时计时,因此累加器每个时钟周期递增3。 In the eighth servo pattern stripe crossed after, three A intervals A1, A2 and A3 are simultaneously timed, so the accumulator is incremented each clock cycle 3. 在第九伺服模式条,累加器递增4。 In the ninth servo pattern stripe, the accumulator 4 increments. 在第十一伺服模式条,第一个A间隔已结束,因此只有三个间隔被继续计时。 In the eleventh servo pattern stripe, the first A interval has ended, and therefore only three intervals continue to be timed. 于是累加器X1的增量减为3,如图18中ROM地址十一的表入口所示,在第十四个伺服模式条所有的A间隔结束,因此累加器的增量变为零。 Then increment to the X1 accumulator is reduced to three, as shown in Figure 18 in the inlet ROM address eleven tables, in the fourteenth servo pattern stripe all A interval ends, therefore the accumulator increment is changed to zero. 这样,在一个OUT1脉冲出现之后,累加器已经含有了四个A间隔的和并且已经准备好产生输出值。 Thus, after an OUT1 pulse occurs, the accumulator already contains the four A intervals and are ready to generate and output values. 同样地,累加器Y1也将完成对B间隔的计时并把数据准备好输出。 Similarly, Y1 accumulator will be completed on the B interval timing and the data ready output.

第二套信号生成系统的累加器X2和Y2以同样的方式工作,开始于CLR2信号,结束于OUT2脉冲的计时(图15)。 Accumulators X2 and Y2 of the second signal generation system in the same manner, starting CLR2 signal OUT2 pulse ends at the timing (FIG. 15). 这样,在一个CLR2信号后越过的第六条伺服模式条对应于一个四菱形组的第一个伺服模式条。 Thus, after a signal across the Article CLR2 servo pattern which corresponds to the first article of a four diamond servo pattern group. 因此,用于第二个信号生成组的A1间隔开始并且累加器X2应该递增1。 Thus, for the beginning of the interval A1 generates a second signal group and X2 accumulator should be incremented by one. 这一点由图18表中ROM地址6所对应的列X2的相应值表示。 This is represented by the respective values in the table in Fig. 18 corresponding to the ROM address six of the X2 column. 在带速大约每秒2.0米的情况下,两个累加器的组合以大约18KHZ的频率提供新的定位信号数据。 In the case of belt speed of about 2.0 meters per second, a combination of two accumulators to a frequency of about 18KHZ provides new position signal data.

图13表示累加器的输出的路径是通过相应的选择器X-SE-LECT,Y-SELECT和D-SELECT,它们选择两个信号生成系统中哪一个含有应被输出的当前输出值。 Figure 13 shows the path of the accumulator is output through the corresponding selectors X-SE-LECT, Y-SELECT, and D-SELECT, they select two signal generation systems in which one of the current output value to be output contains. 由上面图16所描述的SE-LECT数据信号控制选择。 By SE-LECT data signal described above in Figure 16 the control selection. 在一个OUT1脉冲后,第二套信号生成系统的累加器激活,在一个OUT2脉冲后,第一套信号生成系统的累加器激活。 After an OUT1 pulse, the accumulator second signal generation system activation, after an OUT2 pulse, the accumulator of the first set of signal generation system activation. 这样,对于图17中所示的交错菱形模式,第一套累加器X1,Y1,D1在一个OUT2脉冲后激活,OUT2脉冲在两个四条组之后出现,而第二套累加器X2,Y2,D2在一个OUT1脉冲后激活,OUT1脉冲在两个五条组之后出现。 Thus, for the interleaved diamond pattern illustrated in Fig. 17, the first set of accumulators X1, Y1, D1 activation after an OUT2 pulse, OUT2 pulse occurs after two four groups, and the second set of accumulators X2, Y2, After an OUT1 pulse D2 activation, OUT1 pulse occurs after two five groups.

在图14所示的最佳实施方式中,执行差错检查以检测丢失的或多余的转换并检测一个条轻微偏移位置上错误地读取的伺服模式条。 In the preferred embodiment shown in FIG. 14, performs error checking to detect missing or extra conversion and detection of one strip slightly displaced position erroneously read servo pattern stripe. 图14中没有表示在差错检测之后可执行的差错校正的细节,但熟练的技术人员根据上面有关图10-12的描述可以很容易地构造出这种电路。 Not shown in FIG. 14 after the error detection executable error correction detail, but the skilled artisan from the description above in relation to Figures 10-12 can easily construct such a circuit. 在图13中,由计数每个峰值脉冲的转换计数器TC1和TC2检测丢失的或多余的条。 In Figure 13, the count of each peak pulse transition counter TC1 and TC2 detect missing or extra pieces. 当一个输出信号脉冲OUT1或OUT2出现时,幅值比较器检查是否检测到了正确数量的转换(13或14,如指示)。 When an output signal pulse OUT1 or OUT2 occurs, magnitude comparators check whether the correct number of detected transition (13 or 14, as indicated). 例如,在第一套累加器中,转换的预定数是14而第二套累加器的预定数是13。 For example, the first set of accumulators, the predetermined number of the transformation is a predetermined number of second accumulator 14 is 13. 如果检测到的数大于预定数,那么由SELECT块产生的数据好(DG)信号将为假。 If the detected number is greater than the predetermined number, then the data produced by the SELECT block good (DG) signal will be false. 系统译码器36(图2)检测DG信号并被警告数据是坏的并采取预定校正措施。 System decoder 36 (FIG. 2) detects DG signal and warning data is bad and takes predetermined corrective action. 例如在最佳实施方式中,校正措施包括保持输出信号为它的先前值。 For example, in the preferred embodiment, the corrective action comprises maintaining the output signal to its previous value.

如果来自一个伺服模式条的PK脉冲在时间上偶尔有点偏移,则所有的A间隔值和B间隔值将有不同的值。 If the PK pulse from one servo pattern stripe is occasionally a little offset in time, then all A interval values and B interval values will have different values. 图13所示的系统提供了偏差累加器D1和D2,它以一种应该提供一个零结果的方式加减各个A和B间隔。 The system shown in Figure 13 provides deviation accumulators D1 and D2, it should provide a way to add and subtract a zero result for each A and B intervals. 如果任何伺服模式条在时间上有偏移,结果将是非零值,或正或负。 If any servo pattern stripe is offset in time, the result will be non-zero, either positive or negative. 一个最大比较器DEVmax和一个最小比较器DEVmin检查偏移累加器的输出,允许伺服模式条的偏移大于一个预订的最小值,它允许系统内的正常噪音产生可接受的差错,但不允许偏移大于一个预定的最大值,这个值指示一个差错。 A maximum and a minimum comparator DEVmax comparator DEVmin check output offset accumulator, allowing the offset of the servo pattern is larger than the minimum value of a booking, which allows the normal noise within the system to produce an acceptable error, but does not allow partial shift greater than a predetermined maximum value, this value indicates an error. 如果差错值小于最大值或者小于或等于最小值,则相应偏差累加器D1或D2的输出变为高并随着SELECT数据信号的输出产生数据好(DG)信号。 If the error value is less than the maximum value or less than or equal to the minimum value, the corresponding deviation accumulator D1 or D2 goes high and the output to the output of the SELECT data signal generating data good (DG) signal. 用这种方法,偏差检查电路还可以在随机噪音产生适于生成一个OUT1或OUT2信号脉冲的模式时防止将随机噪音认为是合法的。 Prevent this way, the deviation check circuitry also generates adapted to generate a signal pulse OUT1 or OUT2 random noise pattern in random noise considered legitimate.

上面描述的信号译码器和定位信号电路使用包含一个条的重复伺服模式,这些条具有平移方向上以一个方位倾斜角连续延展越过伺服信息磁道宽度的磁通转换。 Signal decoder and position signal circuitry described above use consists of a repeating servo pattern stripe, the strips having a translational direction with azimuth angle of inclination extend continuously across the width of servo information tracks of magnetic flux transitions. 信号译码器接收模拟伺服读头信号并产生一个定位信号,它是来自伺服模式的两个间隔比率的一个函数。 Signal decoder receives the analog servo read head signal and generates a positioning signal which is a function of the ratio of two intervals derived from the servo pattern. 这就提供了一个不依赖于带速因而对带速的变化不敏感的伺服控制系统。 This provides a does not depend on the speed with which is not sensitive to changes in tape speed servo control system. 熟练的技术人员会懂得可采用不同的技术在磁存贮介质上,如磁带,生成图4-9所示的伺服模式,下面将描述用于生成译码器使用的伺服模式的不同系统。 Skilled in the art will appreciate that various techniques may be employed in the magnetic storage media, such as tape, to generate the servo pattern shown in Figure 4-9, different systems will be described below for generating the servo patterns used by the decoder.

图19给出了一个用于生成上面所描述伺服模式的磁鼓系统300。 Figure 19 shows the drum system described above for generating a servo pattern 300. 记录有伺服模式的磁带302缠绕在一个鼓306的曲面304上,以使得弯曲部分与磁带相反一侧的一个电磁铁308邻接,电磁铁308产生一个向外的朝向磁带的磁通线。 Servo pattern is recorded on the magnetic tape 302 wound around a drum 304 surface 306, so that the bent portion and an opposite side of the tape 308 adjacent to the electromagnet, the electromagnet 308 generates a magnetic flux outwardly toward the tape line. 一个凸起的组槽序列以所期望伺服模式的形式设置于鼓表面上。 Sequence of a convex set of grooves to form the desired servo patterns provided on the drum surface. 例如,图20所示设置于鼓的表面部分304的组槽在磁带302上产生一个与图4所示相同的伺服模式。 For example, as shown in Figure 20 disposed on the surface of the drum portion 304 of the plurality of grooves to produce the same servo pattern as shown in Figure 4 on a magnetic tape 302. 熟练的技术人员对于用于产生伺服模式的鼓系统的实现的其它细节是熟知的并且不构成这里所描述的本发明的一部分,例如可参看Bernard的美国专利3,869,711。 Skilled in the art for generating a servo pattern for the other details of a drum system implementation is well known and forms no part of the present invention described herein, for example, can be found in Bernard U.S. Patent No. 3,869,711.

熟练的技术人员可懂得当外部电磁铁308在磁带上投射一个磁区域时鼓上的304部分屏蔽了与组槽相接触的磁带部分,并留下了期望的伺服模式磁通转换条。 Skilled in the art can understand when the external electromagnet 308 projects a magnetic regions on the magnetic tape on the drum portion 304 shields part of the tape in contact with the plurality of grooves, and leaving the desired servo pattern flux transition condition. 采用光刻技术高质量地形成鼓模式组槽310,因为这种技术提供了精确再现伺服模式所需的高精度。 Is formed using photolithography techniques quality drum patterns of grooves 310, because this technique provides a precise reproduction of the servo patterns required precision. 最好在非磁性鼓上使用镍、铁或玻莫合金材料构成这些组槽。 Preferably used in the non-magnetic drum nickel, iron or permalloy material constituting the group of slots.

产生模式的最佳方法是使用一个多间隙伺服写头。 The best way is to use the model to generate more than one gap servo write head. 最佳实施方式中的多间隙头采用熟练的技术人员所熟知的成相技术制成。 The preferred embodiment uses a multi-gap head skilled in the art known as phase techniques. 图21给出了一个根据本发明构造的多间隙伺服写头400。 Figure 21 shows a write according to the present invention is constructed in multi-gap servo head 400. 图21所示的头包含一个带有模式化的NiFe孔片区域404的铁氧体环402。 Header contains 21 shown in FIG NiFe hole sheet area with a model of the ferrite ring 404 402. 两个铁氧体块406,408构成了磁头外形,它们之间由一个玻璃垫片411分隔。 Two ferrite blocks 406, 408 constituting the shape of the head, between which are separated by a glass spacer 411.

在构造磁头时,首先采用环氧树脂胶或玻璃粘合技术把铁氧体块406,406和玻璃垫片411结合在一起。 In constructing the head, the first use of glass epoxy glue or adhesive technology to ferrite blocks 406, 406 and 411 glass spacers together. 形成的结构被磨光以形成一个所期望的前端轮廓,它包含带的支撑面。 Structure formation is polished to form a desired contour of the front end, which comprises the support surface belt. 在最佳实施方式中,提供了一个柱形前端表面。 In the preferred embodiment, there is provided a cylindrical front end surface. 在头对磁带操作时将横槽412切入头内以去除空气。 In head-to-tape operation when the transverse grooves cut within the first 412 to remove the air.

如图22所示,一个导电的籽晶层416沉积于前端轮廓表面。 22, an electrically conductive seed layer 416 is deposited on the front end of the contour. 在最佳实施方式中使用了800埃的NiFe,然后感光性树脂材料沉积于前端表面并形成所要求的伺服模式414的形状,柱表面的模式化可采用熟练的技术人员所熟悉的接触曝光或投影曝光完成。 In the preferred embodiment using a NiFe 800 angstroms, then the photosensitive resin material is deposited in the front end surface and form the desired servo pattern 414 shape, cylindrical surface of the patterned skilled in the art may be familiar to contact exposure or projection exposure is completed. 因为仅在位于柱面顶端的伺服模式需要高分辨率,所以可采用标准的平面曝光。 Because only in servo mode is located at the top of the cylindrical require high resolution, so using standard planar exposure. 在最佳实施方式中,定义间隙区的感光性树脂线宽2um,高3.5um。 In the preferred embodiment, the photosensitive resin gap width defined area 2um, high 3.5um.

所要求的间隙结构在感光性树脂中形成后,在去除了感光性树脂材料的籽晶层416上镀一层大约为2um的Ni45Fe55材料,然后去除剩余的感光性树脂。 After the desired gap structures are formed in the photosensitive resin, in addition to the seed layer 416 coated on the photosensitive layer of the resin material is approximately 2um Ni45Fe55 material, and then removing the remaining photosensitive resin. 然后在前端表面上沉积一层抗磨损的外壳420以保护它。 And then depositing a layer of abrasion-resistant housing on the front end surface 420 to protect it. 在最佳实施方式,外壳是一个厚度大约为3000埃的NiFeN/FeN夹层结构。 In the preferred embodiment, the housing is a thickness of about 3000 angstroms NiFeN / FeN sandwich structure. 也可使用其它的外壳材料,如类金刚石碳或其它抗磨损材料。 Also possible to use other shell materials, such as diamond-like carbon or other wear resistant material.

最后,如图21所示,一个线圈420通过一个线横422缠绕在铁氧体块408上,这样就完成了头的制作。 Finally, as shown in Figure 21, a coil 420 by a wire 422 wound on the ferrite cross block 408, thus completing the head of the user. 越过每个间隙的磁通位于与平版印刷相同的表面内。 Each magnetic flux across the gap is located in the same lithographic printing surface. 间隙的宽度受限于光刻技术的分辨率,但允许在限制之内的任意复杂的间隙形状,这样,图4-9所示伺服模式所要求的直对角线间隙在上面描述的水平头设计中很容易实现。 Width of the gap is limited by the resolution of photolithographic techniques, but straight diagonal gap within limits permitted arbitrarily complex gap shapes, so that, as shown in Figure 4-9 required for the servo pattern described above head level design is easy to implement. 熟练的技术人员懂得因为平面处理的限制在一个垂直头中产生所要求的间隙结构需要一个复杂得多的过程。 Skilled in the art know how to deal with the plane because of the restrictions required gap structure in a vertical head requires a much more complex process.

头400的一个新颖之处是它采用磁饱和现象来简化它的设计。 A novelty of the head 400 is that it uses magnetic saturation to simplify its design. 在图23中从更多细节方面所表示的写间隙414包含于一个连续的磁NiFe网格中。 Figure 23 in more detail from the write gap indicated at 414 comprises a continuous magnetic NiFe grid. 常规的理论会认为因为几乎所有的磁通将从低磁阻的NiFe通过而不通过高磁阻的写间隙,所以当头被激磁时这些间隙中的磁场应该很小,这些间隙看起来被NiFe网格短路了。 Conventional theory considers because almost all of the magnetic flux from the low reluctance NiFe rather than through the high reluctance of the write gap, so that the lead through the gaps should be small when the magnetic field is energized, the gaps appear to be NiFe network Georgia shorted. 但是,在大电流时NiFe网格的短路区变为磁饱和的,使得导磁性急剧下降。 However, at high currents NiFe grid shunt becomes magnetically saturated, so that a sharp decline in magnetic permeability. 随着磁饱和的加剧,写间隙成为剩余磁通的最佳路径。 With the intensification of the magnetic saturation, the best way to write the remaining gap flux. 在大的写电流时,这种设计产生了精确写磁带所必需的间隙磁场。 In a large write current, this design produces a precise write gap magnetic field necessary for the magnetic tape. 这种设计提供了一个供磁带在其上运转的几乎完全光滑的表面。 This design provides an almost completely smooth surface for the tape running thereon. 更多的常规设计将要求较宽的分隔间隙以把磁通导入写间隙,这种分隔间隙提供耐高压的边缘以防止被磁带磨损。 More conventional designs would require wide separation gap in the magnetic flux introduced into the write gap, this separation gap provided high pressure to prevent the edge is worn tape. 这些宽的间隙还可积存带的碎屑,可能在头和带之间产生不希望的间隔。 These wide band gap may also accumulate debris, may produce undesirable spacing between the head and the tape. 应该注意,在写间隙430上加了额外的向外张开的端部432以便清晰地划分写模式的界限。 It should be noted, on the write gap 430 plus an additional 432 to clear the boundaries dividing the writing mode ends flared outwardly. 如果没有提供向外张开的端部,越过写间隙的磁场就会在端部减弱。 If no outwardly flared end portion, the magnetic field across the write gap will be reduced at the ends. 向外张开的端部使得直到写间隙的末端都可保持几乎完整的写磁场。 Outwardly flared end portions such that until the end of the write gap can maintain an almost complete write field.

饱和效应还用来有效地消除由于磁籽晶层和最佳磨损外壳所引起的负作用。 Saturation effects are also used effectively to eliminate negative effects due to the magnetic seed layer and the best wear caused by the housing. 这些层是磁性的并且复盖了头的整个前表面,包括写间隙414。 These layers are magnetic and cover the entire front surface of the head, including the write gap 414. 间隙短路的这个缺点除这些薄膜会在一个很低的电流下饱和这个问题外,在高的写电流下没有影响。 In addition to short-circuit the gap of this drawback of these films will saturate this problem in a very low current, there is no impact at high write currents. 熟练的技术人员会认识到对饱和效应的良好利用简化了设计并提高了头的性能。 Skilled in the art will recognize that a good use of saturation effects simplifies the design and improves the performance of the head.

伺服读头的最佳实施方式采用一个带有横槽的柱面来保持带和头之间的良好接触。 Servo read head of the preferred embodiment uses a cylinder with a transverse groove to maintain good contact between the tape and the head. 也可采用其它保持这种接触的技术。 But also using other techniques to maintain such contact. 特别是,可使用一个带有小圆角边缘的平头,把带覆盖于边缘上。 In particular, you can use a flat head with a small rounded edges, the belt cover on the edges. 图24图示了这种技术。 Figure 24 illustrates this technique. 头900具有一个平面前表面902。 Head 900 having a flat front surface 902. 带904以一个小的卷过头的角度(例如1度)与头接触。 Belt 904 to a small volume in contact angle too far (e.g., 1 degree) and the head. 使带从头的圆角上通过的动作能去除头和带之间的空气层。 Make the action with a scratch on the corner can be removed by the air layer between the head and the tape. 由于带本身有一定的弹性系数,带在圆角附近稍微离开磁头,但然后立即和头相接触。 Because band itself has a certain elasticity, with a little left in the vicinity of a rounded head, but then immediately and head contact. 可采用这种技术保持头和带接触。 This technique can be used to maintain contact with the head and. 熟练的技术人员可认识到通过从头设计中去除柱面和横槽可在一定程度上简化头的制造过程。 The skilled artisan will recognize that the removal of cylinder head and the transverse grooves can be simplified in the manufacturing process to some extent, by de novo design.

图25图示了采用一种模式记录系统502来生成具有上面所示伺服模式磁带的过程。 Figure 25 illustrates the use of a pattern recording system 502 generates a magnetic tape having the servo patterns illustrated above process. 系统502可在如图1所示的带驱动器12中提供。 System 502 may be provided in the tape drive shown in Fig. 12. 特别是图25表示了生成一个具有图9所示模式的磁带的过程并给出了如图21和23所示当带504与写头510相接触通过时的顶视图506和侧视图508。 In particular Figure 25 shows the generation of a magnetic tape having the pattern shown in Figure 9 and shows the process as shown in Figure 504, when in contact with the belt 510 by the write head 21 and 23 a top view and a side view 506 508. 带通过的方向由箭头512所示。 By direction of the band as shown by arrow 512.

带的写头510通常不激磁,但它由一个预定极性的电流脉冲在预定时间周期性地激磁。 Write head band 510 generally does not energized, but it consists of a predetermined polarity of the excitation current pulses periodically at a predetermined time. 也就是说,头在一个零电流和一个单一极性的电流之间切换。 That is, the first between a zero current and a single polarity current switching. 熟练的技术人员将会注意到这一点不同于常规方式,常规方式中写头在相反极性电流间切换。 Skilled in the art will note that this is different from a conventional manner, in a conventional manner to switch between the write head current of opposite polarity. 为在带504上产生期望的伺服模式,带以一个预定的速率移动同时写头510接收周期性的电流脉冲。 To produce the desired servo pattern on the tape 504, with a predetermined rate while moving the write head 510 receives the periodic current pulses. 写头的周期性电流脉冲在带上产生一个磁通模式,这个模式是头间隙结构的复制,如图25中带模式514的表示所示。 Write head periodic current pulse generates a magnetic flux in the tape mode, this mode is a copy of the head gap structure, as shown in FIG. 25 schematically shows belt 514. 由图25应该很清楚,两个人字形的写间隙以足够大的空间隔开以使两个相对的带条,或菱形,由通过写头510的每个电流脉冲记录并且对电流脉冲进行计时以产生图9所示的交错菱形模式,这种模式中一个四个交错菱形的组后跟随着一个五个菱形的组。 It should be clear from Figure 25, two write-shaped gap with a large enough space so that the two spaced opposing strips, or diamond, and by the timing of the current pulses through the write head 510 records each current pulse to produce the interleaved diamond pattern illustrated in FIG. 9, this mode a four interleaved diamond groups is followed by a set of five diamond.

图25表示对头写间隙间的空间511进行选择以使可在对带的一次扫描中写完交错模式。 Figure 25 shows the gap between the head write space 511 may be selected so that a scan of the finished tape interleaving pattern. 磁存贮介质以一个预定的速率在头的转换方向上移动同时伺服读头被一个预定极性的脉冲激磁以产生磁通并对每次激磁在带上的磁道中自动记录一个第一方位角方向的伺服模式转换条和一个第二方位角方向的伺服模式条。 Magnetic storage medium at a predetermined rate of movement while the servo read head is a predetermined polarity in the excitation pulses to change the direction of the head every time the excitation flux is generated and automatically record a first azimuth angle on the tape track Servo mode conversion direction strips and a second azimuthal direction of the servo pattern stripe. 头被重复激磁直到在磁带上记录的条包括一组交错菱形组。 Head is repeatedly energized until the recording on the tape strip comprises a set of the interleaved diamond groups. 更具体讲,伺服间隙是如此选择,使得在带的写速度下,在一个四条组或五条组的最后电流脉冲时,由尾间隙513记录的转换条全部位于在这组的第一个电流脉冲时分别由头间隙515和尾间隙记录的第一条之间。 More specifically, the servo gap is selected so that at the write speed of the belt, at the last current pulse of a group of four or five groups, the recording by the trailing gap 513 converts strip are all located in this group the first current pulse When the gap between the head end 515 and the first record of each gap. 这样,在头适当的四个或五个动作之后就得到了期望的交错伺服模式。 Thus, after the first four or five appropriate action to obtain the desired interleaved servo pattern.

同样,可通过在预定带速下继续移动磁带而不对伺服写头激磁以产生伺服模式条来形成同步特征的空闲间隔。 Similarly, you can continue to move through the tape at a predetermined speed with the servo write head without excitation to produce a servo pattern pieces to form a synchronous idle interval. 空闲间隔在转换方向上的延展取决于头不被激磁的时间长短和预定的带速。 Intervals in the direction of extension of the conversion depends on the head is not idle excitation and a predetermined length of time with speed. 写头没有激磁的时间最好足够长以使被一组脉冲所写的全部条都位于被前一组脉冲所写的条之外。 Write head is not the best time excitation long enough to make the outside by a group of pulses written all bars are situated in front of a group of pulses written article. 也就是说,由尾间隙513越过的一组中的所有转换条都位于将在条上写的下一组的任何条之前。 That is, by the trailing gap 513 across all of a group are located at any shift bar on the bar strip prior to writing of the next group.

为了写如图8所示的一个无交错模式,头的写间隙分隔和脉冲采取一种方式以使在每个电流脉冲时由尾间隙记录的转换条全部位于在前一电流脉冲时由头间隙所记录的条之外。 Shown in Figure 8. In order to write a non-interlaced mode, the write head gap separation and pulse taking in a manner such that each current pulse recorded by the trailing gap shift bar are all located in the front of a current pulse when the head gap of the recorded outside bar. 也就是说,由头间隙所写的条在写头的下一次激磁前通过尾间隙。 That is, the article written by the head gap before the next write head through the tail gap excitation. 通过延迟伺服写头的磁化形成条组间的同步特征以产生一个足够长时间的伺服模式条,从而使得位于在一组的最后一个电流脉冲时由头间隙记录的最后一个条和在下一组的第一个电流脉冲时由尾间隙记录的第一个条之间沿转换方向的最小间距大于一组之内任何一对连续条在转换方向上的最大距离。 The last strip of the head when the recording gap servo write head by delaying the formation of the magnetization characteristics of the synchronization between the strip set long enough to produce a servo pattern stripe, so that a group located at the end of a current pulse and the next group in minimum spacing along the transducing direction between the first bar by the trailing gap is greater than any record a pair of continuous strips maximum distance in the direction of conversion within a set time of a current pulse.

如图25所示,伺服模式记录系统502的可编程模式生成器516产生提供给脉冲发生器518的脉冲,脉冲发生器518给写头510以周期性激磁。 25, the servo pattern recording system 502 of a programmable pattern generator 516 is supplied to the pulse generator 518 generates a pulse, the pulse generator 518 to the write head 510 in a periodic excitation. 因为脉冲有一定的宽度并且带以一预定速率移动,所以,记录于带504上的伺服磁通模式拉长了写头实际间隙的形状,由于带速和脉冲宽度的作用,记录于带上的磁通模式宽于写头的间隙。 Because there is a certain pulse width and the band moving at a predetermined rate, therefore, the servo flux patterns recorded on the tape 504 on the elongated shape of the actual gap of the write head, tape speed and the pulse width due to the role of the recording on the tape flux pattern is wider than the write head gap.

伺服模式记录系统502可操作于AC或DC可擦除磁带。 Servo pattern recording system 502 can operate in AC or DC erasable tape. 如果磁带504是AC可擦除的,则意味着带具有零磁性,则当头510激磁时,带在间隙哉上方以一种极性磁化。 If the tape 504 is AC erasable, it means that with a zero magnetic excitation 510 when the pledge, the band gap in a polar magnetization Kazuya above. 带的其余部分具有零磁性。 The remaining portion of the belt has a zero magnetic. 如果磁带504是DC可擦除的,则意味着带以一种极性磁化,那么必须定向越过写头510的电流以使记录的磁通模式带磁化为相反的极性。 If the tape 504 is a DC erasable, it means that the magnetic tape in a polar, then the write head 510 must be directed across the current so that the recording mode of the magnetic flux is magnetized with opposite polarity. 于是形成的记录模式由相反极性的磁域间的转换构成。 Thus formed is constituted by the recording mode conversion opposite polarity magnetic domains. 从一个DC可擦除带读回一个伺服模式时产生的信号大约是从AC可擦除带产生信号的两倍。 Generated from a DC erasable read back when with a servo pattern from the AC signal is approximately twice the signal can be erased with produce. 然而在最佳实施方式中,使用一个AC可擦除带以防止产生一个过大的信号使得伺服读头饱和。 In the preferred embodiment, however, the use of an AC erasable tape to prevent a too large so that the servo read head signal saturation. 也可降低写电流的强度以削弱带上写区域的磁性,从而降低读回的信号。 The write current can be reduced to weaken the strength of the magnetic tape writing area, thereby reducing readback signal.

图25所示的模式生成器可采用熟练的技术人员所熟悉的多种技术来构成,例如,可把要求的脉冲模式记录于一个可编程只读存储器(PROM)并通过一个适当的寻址电路循环。 Pattern generator 25 shown in Fig skilled in the art may be familiar with a variety of techniques to form, for example, the required pulse pattern recorded in a programmable read-only memory (PROM) and through an appropriate addressing circuit cycle. 另外也可用一个合适的计数器和相关逻辑的集合来产生要求的脉冲模式。 There is also available a suitable set of counters and associated logic to generate the required pulse mode. 这些技术是熟练的技术人员所熟知的,无需进一步解释。 These techniques are well known to the skilled person, without further explanation.

应该懂得记录于带上的伺服模式的精确性依赖于模式生成定时和带速的精确性。 Should know how to put on record the accuracy of the servo pattern is dependent on the timing and pattern generation with a speed accuracy. 模式生成定时采用良好的晶控因此是非常精确和稳定的。 Good timing pattern generation using crystal controlled and therefore it is very accurate and stable. 但是带速较难控制,在最佳实施方式中,要求带速达到0.1%的精确度并调整模式生成器的定时以校正带速的误差。 But difficult to control the belt speed, in the preferred embodiment, the requirement to reach 0.1% of belt speed and accuracy of the timing adjustment pattern generator to correct for tape velocity errors. 获得这种精确性的一种替代方法是测量写头附近的带速并调整模式生成器的定时以校正带速的误差。 An alternative method is to measure the accuracy of obtaining such written around the head and adjust the timing belt speed pattern generator to correct errors with speed. 例如,可用一个由带转动的精确的轴编码器505或一个激光多普勒设备完成带速的测量。 For example, can be made with a rotating shaft encoder 505 accurate or complete with a laser Doppler velocity measurement device. 熟练的技术人员应该很清楚这种带速测量系统的细节。 Skilled in the art should be clear that the details of such a tape velocity measurement system.

在模式脉冲生成后,必须把它们转化为越过写头的电流脉冲。 After the pulse generation mode, they must be converted to a current pulse across the write head. 在最佳实施方式中,脉冲发生器电路产生宽度为150ns的脉冲,具有高达3安培的峰值电流和一个小于50ns的上升和下降时间。 In the preferred embodiment, the pulse generator circuit generates a pulse width of 150ns, with up to 3 amps of peak current and a less than 50ns rise and fall times. 熟练的技术人员会知道这样的脉冲发生器可用如一个电源MOSFET开关和一个限流电阻构成。 The skilled artisan will know that this can be used as a pulse generator power MOSFET switch and a current-limiting resistors. 这些技术对于熟练的技术人员非常明显,无需进一步解释。 These technologies are very obvious to the skilled person, without further explanation.

图26是一个图示了带验证部分的磁带写系统502的原理图并表示在带上记录伺服模式时磁带504经过一个供带卷轴520到达一个收带盘522。 Figure 26 is an illustration of the tape with the verification section 502 write system schematics and said at the time to bring a tape recording servo pattern through a supply reel 504 520 522 arrives at a take-up reel. 模式生成器516产生模式脉冲,这些脉冲送给伺服写头脉冲发生器518,然后立即对写头510激磁。 Pattern generator 516 generates a pulse mode, these pulses to the servo write head pulse generator 518, and then immediately write head 510 excitation. 当带504已经记录伺服模式后,必须对模式进行验证以保证高质量。 504 have been recorded when the band servo pattern, patterns must be verified in order to ensure high quality. 一个伺服读头524读取刚刚记录的伺服模式并给一个预放大器526提供一个伺服信号。 A servo read head 524 reads servo pattern just recorded a pre-amplifier 526 and to provide a servo signal. 预放大器向一个模式验证器528提供一个放大的伺服信号,该验证器执行各种验证操作,如检查伺服模式,信号幅度,遗失率和冗余伺服磁道的一致性。 Pre-amplifier to provide a schema validator 528 a servo signal amplification, which verify the consistency of the various validation performs operations such as checking the servo pattern, signal amplitude, loss rate and redundant servo track. 验证器使用一个坏带标记头530,如果发现了任何差错则在带504上作一标记以使得不会把带上的坏段装入带盒中(图26)。 Verify that uses a bad head tagged 530, if you find any errors in the band 504 to make a mark on so as not to bring the bad segment loaded cassette (Figure 26).

虽然这些讨论集中于讲述伺服磁道的实施方式,这种伺服系统也适用于嵌入式伺服实施方式。 Although the discussion focuses on embodiments described servo track, which servo system is also applicable to embedded servo embodiments. 在所讲述的伺服磁道系统中,某些磁道专门用于伺服模式。 In the servo track system described in certain tracks dedicated servo pattern. 在操作中一个伺服读取部件总是位于一个伺服磁道之上而其它部件用于读和写数据。 In operation a servo read part is always located above a servo track and other components for reading and writing data. 嵌入式伺服系统在同一磁道上从空间上对伺服模式和数据块进行划分。 Embedded servo systems on the same track from the spatial pattern and the servo data blocks divided. 用这种方法,可使用单个部件既读伺服信息又读取数据。 In this way, a single component can be used both to read the servo information and read data. 因为单个部件用于两项工作,所以,嵌入式伺服方法降低了伺服采样频率和数据率。 Because a single member for two work, so the embedded servo sample servo method reduces the frequency and data rate. 使用同一头进行伺服和数据读取的一个缺点是无法将一个窄的伺服读头用于于所有的实际目的。 One disadvantage of using the same servo head and data can not be read is a narrow servo read head for all practical purposes. 但是可以得到其它优点,如降低了一个头组件中所需的元件数并减小了由于使用分离的伺服和数据部所造成的偏移差错。 However, other advantages can be obtained, such as reducing the number of components required in a head assembly and reduces the use of separate servo and data portion of the error caused by the offset. 熟练的技术人员会认识到这里所描述的伺服系统可扩大应用于嵌入式伺服应用。 The skilled artisan will recognize that the servo system described herein may be used in embedded servo applications expand.

这样,上面所述的是一个重复磁通转换的伺服模式,它延展越过每个伺服磁道宽度以使得一个伺服读头在平移方向上移动越过伺服磁道宽度同时带在头下在转换方向上移动时,它们可以产生一个伺服定位信息信号,同时对转换之间的间隔定时以此来指示磁头在磁道中的相对位置。 Thus, the above is a servo pattern of repeating magnetic flux transitions that extend across the width of each servo track such that the servo read head in a translational direction moves over the servo track width at the same time with the head is moved in the shift direction when , they produce a servo position information signal, while the interval between the timing of the conversion in order to indicate the relative position of the magnetic head in the track. 上面还描述了适于产生伺服模式的一组不同的伺服写头,其中包括构造一个多间隙伺服写头的最佳方法。 Also described above is adapted to generate the servo pattern of a different set of servo write head, including the best way to construct a multi-gap servo write head. 上面还描述了一个伺服模式写系统,其中包括一个确保对带上伺服模式再现的准确性的带验证系统。 Above also describes a servo pattern writing system, which includes a belt to ensure the accuracy of the servo pattern reproduced with verification system.

以上以目前最佳实施方式的形式对本发明进行了描述以使得可以表达对本发明的理解。 In its present form the above preferred embodiment of the present invention has been described in order to make it possible to express the understanding of the invention. 然而,对于伺服译码器,伺服模式,伺服控制系统,存储介质,伺服写系统,数据存储系统和伺服写头的许多配置在这里没有特别描述,但它们是可用于本发明的。 However, for the servo decoder, servo pattern, the servo control system, a storage medium, the servo write system, data storage systems, and many of the servo write head configuration is not particularly described here, but they are useful in the present invention. 因此不应该把本发明理解为仅限于所描述的特定实施方式,而应认识到本发明对于伺服译码器,伺服模式,和伺服写头具有广泛的通用性。 Thus the present invention should not be construed as limited to the particular embodiments described, but should be appreciated that the present invention is a decoder for the servo, servo pattern, and the servo write head having a wide range of versatility. 因此所有在所附权利要求范围之内的修改,变动或等价组织结构都应认为在本发明范围之内。 Thus all modifications within the scope of the appended claims, changes or equivalent structure should be considered within the scope of the present invention.

Classifications
International ClassificationG11B5/584, A63F7/02, G11B5/596, G11B5/58, G11B21/10, G11B5/265
Cooperative ClassificationG11B5/584
European ClassificationG11B5/584
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