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Publication numberCN100363985 C
Publication typeGrant
Application numberCN 200410064119
Publication date23 Jan 2008
Filing date25 Apr 1995
Priority date30 Jun 1994
Also published asCA2148390A1, CA2148390C, CN1124399A, CN1168090C, CN1320524C, CN1320526C, CN1661682A, CN1661683A, CN1783219A, CN1783224A, CN100350458C, DE69507210D1, DE69507210T2, EP0690442A2, EP0690442A3, EP0690442B1, US5689384, US6021013, US6282051, US6320719, US6462904
Publication number200410064119.1, CN 100363985 C, CN 100363985C, CN 200410064119, CN-C-100363985, CN100363985 C, CN100363985C, CN200410064119, CN200410064119.1
Inventors托马斯罗伯特奥尔布雷克特, 罗伯特卡尔巴雷特, 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 data memory system
CN 100363985 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(22)  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,该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: 一个磁头组件,它含至少一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,启动它以将该磁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: 伺服译码器中含有通过对读头信号的模式识别而检测定位信号中的差错的装置,使得伺服译码器把读头信号与记录在存储介质上的预定的伺服模式相关联,并且,若在一差错限度内信号不相关,则伺服译码器指示一个错误状态。 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 at least one track storage medium surface, the system comprising: a magnetic head assembly, It contains at least one 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 positioning signal, the positioning signal indicating the position of the read head relative to the servo pattern; a translation assembly, start it with 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 The decoder contains the read head signal by pattern recognition and detection of errors in the positioning signal means, such that the servo read head signal decoder and recorded on the storage medium associated with the predetermined servo pattern, and, if within the limits of an error signal is uncorrelated, then the servo decoder indicates an error condition.
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中用于检错的装置检测伺服模式,该伺服模式中包括磁通转换的一个循环序列,所述磁通转换中含有周期性的同步特征,并且伺服译码器通it^同步特征之间转换出现的次数进行计数并把该次数与预定伺服模式中的转换次数相比较而使伺服头信号相关,使得若由伺服译码器检测出的转换次数与已知存在于预定伺服模式中的数不等,则伺服译码器指示一个错误状态。 Servo control system according to claim 1, characterized in that the servo decoder for error detection means for detecting a servo pattern, the servo pattern comprising a cyclic sequence of magnetic flux transitions, the magnetic flux transitions in containing periodic synchronization features and the servo decoder through it ^ synchronous frequency conversion occurs between the counts and the number of times of the predetermined number of transitions in the servo pattern comparing correlation signal leaving the servo head, so that if the servo Conversions decoder detected and the number known to exist in a predetermined range of servo mode, the servo decoder indicates an error condition.
3. 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中用于检错的装置对从祠服模式所产生的读头信号进行译码,该伺服模式包括磁通转换的一个循环序列,所述磁通转换沿磁道宽度持续延展并定义伺月艮模式条使得伺服读头信号随磁头移动越it^道宽度而变化,所述条中包舍至少一个第一方位角方向和一个第二方位角方向,使得第一方位角方向不和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。 Servo control system according to claim 1, characterized in that the servo error detection means in the decoder for the signal from the read head temple clothing pattern generated by decoding, the servo pattern comprises a flux transition a loop sequence, along the track width of the flux conversion continued to extend and define the servo pattern stripe Burgundy month so that the servo read head signal with the head movement and change it ^ channel width, the strip of at least one of the first homes in the package azimuth direction and a second azimuthal direction, such that the first azimuthal orientation is not parallel to the second azimuthal direction, and the strips arranged in groups, after the group in the first plurality of sequential stripe azimuthal direction in the second azimuth a plurality of sequential stripe direction.
4. 权利要求3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至少一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 3, characterized in that the synchronous servo pattern contains at least one free space conversion polarity is not converted, and the minimum length in the transducing direction exceeds the same set The maximum length in the transducing direction between the azimuth direction of the continuous strip to convert the polarity.
5. 权利要求2中所迷的伺服控制系统,其特征在于伺服译码器中用于检错的装置对从伺服模式所产生的读头信号进行译码,所述伺服模式中包括磁通转换的一个循环序列,所述磁通转换沿磁道宽度持续延伸并定义伺服模式条,使得伺服读头信号随磁头移动过磁道宽度而变化,条中包含至少一个第一方位角方向和一个第二方位角方向,使得第一方位角方向不和第二方位角方向平行,并且条成组排列,組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,組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。 2 in the servo control system fans claim, wherein the servo error detection means in the decoder for read head signal produced from the servo pattern decoding, said servo pattern comprising transition in flux a loop sequence, the flux transitions track width and extending continuously define servo pattern stripe, so that the servo read head signal with the head is moved over the track width change, a strip comprising at least a first azimuthal orientation and a second orientation angular direction, such that the first azimuthal orientation is not parallel to the second 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, the group characterized by the synchronization between the separated, the synchronous servo decoder can be detected.
6. 权利要求5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至少一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。 In the servo control system according to claim 5, characterized in that the synchronization feature in the servo pattern contains at least one non-polar transformation space not converted, and the minimum length in the transducing direction exceeds the same set The maximum length in the transducing direction between the azimuth direction of the continuous strip to convert the polarity.
7. 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中用于检错的装置检测伺服才莫式,所述伺服模式中包括磁通转换的一个循环序列,并且祠服译码器通过确定多个预定转换对之间的读头信号相关,使得若在差错限度内此时间间隔间的关系与预定的关系不等,则伺服译码器指示一个错误状态。 Servo control system according to claim 1, characterized in that the servo decoder means for detecting the servo error detection only Mohs, said servo pattern comprising a cyclic sequence of magnetic flux transitions, and serving Temple decoder read head signal by determining a plurality of correlations between the predetermined conversion so that if the time relationship between the interval ranging from a predetermined relationship between the error within the limits, then the servo decoder indicates an error condition.
8. 权利要求7中所述的伺服控制系统,其特征在于伺服译码器中用于检错的装置比较各个转换对之间的多个时间间隔是否相等,使得若时间间隔相互间的差别大于预定的差错限度,则伺服译码器指示一个错误状态。 Difference servo control system according to claim 7, characterized in that a plurality of time the servo decoder means for error detection on the comparison between each conversion interval are equal, so that if the time interval between each other is greater than predetermined error limit, then the servo decoder indicates an error condition.
9. 权利要求7中所述的伺服控制系统,其特征在于伺服译码器中用于检错的装置比较各个转换对之间的多个时间间隔的总和是否相等,使得若总和相互间的差别大于预定的差错限度,则伺服译码器指示一个错误状态。 Servo control system according to claim 7, characterized in that the sum of a plurality of time the servo decoder means for error detection on the comparison between each conversion interval are equal, so that if the sum of the differences between each other greater than a predetermined error limit, then the servo decoder indicates an error condition.
10. 权利要求l中所述的伺服控制系统,其特征在于祠服译码器的定位信号中包含一个值的序列,并且,若伺服译码器在读头信号中指示了错误状态,则伺服译码器把当前定位信号的值替换成从在错误状态之前出现的一个或多个定位信号值推导出来的值。 L in the servo control system according to claim 1, characterized in that the temple server decoder positioning signal includes a sequence of values, and, if the decoder in the servo read head signal that is indicative of an error state, the servo translation decoder to replace the current value from the positioning signals into one or more positioning signal values before the error status of the derived value.
11. 权利要求10中所述的伺服控制系统,其特征在于替换值是在指示错误状态之前伺服译码器产生的最后定位信号值。 Servo control system according to claim 10, wherein the replacement value is the last position signal value of the servo decoder before the error generated in the indication.
12. 权利要求l中所述的伺服控制系统,其特征在于祠服译码器的定位信号中包含一个值的序列,并且,若伺服译码器在读头信号中指示了错误状态,则伺服控制系统放弃当前定位信号值。 L in the servo control system according to claim 1, characterized in that the temple server decoder positioning signal includes a sequence of values, and, if the decoder in the servo read head signal that is indicative of an error state, the servo control system to abandon the current position signal value.
13. 权利要求12中所述的伺服控制系统,其特征在于伺服控制系统中含有一个或多个附加读头,用于读取存储介质上相应的附加伺服模式并产生表示附加伺服模式的相应的附加读头信号;系统还含有一个或多个相应的附加伺服译码器,用于接收附加的头信号并对其译码以产生相应的附加的定位信号用于指示附加读头相对于伺服模式的位置,并且伺服控制系统将被放弃的当前定位信号值替换成从不在错误状态之中的一个或多个附加伺服定位信号值推导出的值。 In the respective servo control system of claim 12, wherein the servo control system comprises one or more additional read heads for reading the storage medium on the respective additional servo patterns and generating an additional servo pattern indicated additional read head signal; system further comprises one or more respective additional servo decoder for receiving an additional header signal and decodes it to generate a corresponding signal for indicating additional positioning additional read head relative to the servo pattern position, and the current value of the servo control system localization signal will never be abandoned replaced one or more additional servo positioning signal values derived values in an error state among.
14. 一种数据存储系统,包括:一个磁存储介质,它具有记录在至少一个伺服磁道上的伺服模式;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,该磁头组件中含有至少一个数据头用以读和写数据,并且含有至少一个伺服读头用于读M储介质道上的伺月良信息;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祠服模式,所述伺服模式记录在存储介质表面的至少一个道上, 一个伺服译码器,它接收祠服读头信号并对其译码以产生定位信号指示伺^L读头相对于伺服才莫式的位置, 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通it^t 读头信号的模式识别而检测差错的装置,使得伺服译码器把读头信号与记录在存储介质上的预定的伺服模式相关,并且,若在一差错限度内信号不相关,则伺服译码器指示一个错误状态。 14. A data storage system, comprising: a magnetic storage medium having recorded on at least one servo track servo pattern; drive means for moving the magnetic storage medium relative to the magnetic head assembly is moved; a head assembly, it moves to the 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 at least one data head for reading and writing data, and contains at least one servo read M head for reading the storage medium servo track good month information; a servo control system, which is used to move the head assembly is positioned close to the surface of a magnetic storage medium for reading Temple service mode, the servo pattern recorded on the storage medium at least one surface of the track, a servo decoder that receives the read head signal and temple service decodes it to generate a position signal indicative of servo ^ L read head relative to the servo position before Mohs, a translation assembly, start it The head assembly is positioned relative to the storage medium, a servo controller, which starts translation assembly in accordance with the positioning signal, wherein the servo decoder through it ^ t read head signal pattern recognition and detection means comprises error, so that the servo decoder converts the read head signal and recorded on the storage medium of a predetermined servo pattern correlation, and, if the error signal is within a limit not relevant, then the servo decoder indicates an error condition.
15. 权利要求14中所述的数据存储系统,其特征在于伺月良译码器中用于检错的装置检测伺月良模式,所述祠服模式中包括磁通转换的一个循环序列,该磁通转换包括周期性同步特征,并且伺服译码器通过对同步特征之间转换出现的次数进行计数并把该次数与预定伺月良模式中的转换次数相比而使伺服头信号相关,使得若由伺服译码器检测出的转换次数与已知存在于预定伺服模式中的数不等, 则伺月良译码器指示一个错误状态。 Data storage system according to claim 14, wherein the servo decoder month good error detection means for detecting servo months benign mode, the service mode includes a temple cyclic sequence of magnetic flux transitions, The flux transitions comprising periodic synchronization features and the servo decoder occurs by converting between synchronous frequency is counted and the number of the month with a predetermined servo pattern in good conversions leaving the servo head signal related compared, If the number of conversions by making the servo decoder detected and known to exist in a predetermined range of servo mode number, then wait months good decoder indicates an error condition.
16. 权利要求15中所述的数据存储系统,其特征在于伺服译码器中用于^^错的装置对从伺服模式所产生的读头信号进^if码, 所述伺服模式中包括磁通转换的一个循环序列,所述磁通转换沿磁道宽度持续延伸并定义伺服模式条使得祠服读头信号随磁头移动过磁道宽度而变化,条中包含至少一个第一方位角方向和一个第二方位角方向,使得第一方位角方向不和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。 Data storage system according to claim 15, characterized in that the means ^^ wrong decoder for servo read head signal from a servo pattern into ^ if the generated code, said servo pattern comprises a magnetic through the conversion of a loop sequence, the flux transitions define the track width and extending continuously so that the servo pattern stripe read head signal with the temple serving the head is moved over the track width changes, bar comprises at least one first direction and a second azimuth Second azimuthal direction, such that the first azimuthal orientation is not parallel to the second azimuthal direction, and strips arranged in groups, after a plurality of strips in a first order in the group is the azimuthal direction in a second azimuthal direction multiple sequential strips.
17. 权利要求16中所述的数据存储系统,其特征在于伺服模式的同步特征中包含在至少一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。 Data storage system 16 according to claim 17., characterized in that the synchronous servo pattern features contained in the free space is at least one of the conversion polarity is not converted, and the minimum length in the transducing direction exceeds the same set The maximum length in the transducing direction between the azimuth direction of the continuous strip to convert the polarity.
18. 权利要求15中所述的数据存储系统,其特征在于伺服译码器中用于检错的装置对从伺服模式所产生的读头信号进行译码, 伺服模式中包括磁通转换的一个循环序列,所述磁通转换沿磁道宽度持续延伸并定义伺服模式条使得伺服读头信号随磁头移动^道宽度而变化,条中包含至少一个第一方位角方向和一个第二方位角方向,使得第一方位角方向不和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,所迷同步特征可由伺服译码器检测出。 Data storage system of claim 15, wherein, wherein the servo error detection means in the decoder for read head signal produced from the servo pattern is decoded, the servo pattern comprising a flux transition loop sequence, the flux transitions define the track width and extending continuously servo pattern stripes such that the servo read head signal with the head moving ^ track width change, a strip comprising at least a first azimuthal orientation and a second azimuthal direction such that the first azimuthal orientation is not parallel to the second 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, and between groups separated by a synchronization feature, synchronous servo decoder can be detected by the fans.
19. 权利要求18中所述的数据存储系统,其特征在于伺服模式的同步特征中包含在至少一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。 Data storage system according to claim 18, characterized in that the synchronous servo pattern features contained in the free space is at least one of the conversion polarity is not converted, and the minimum length in the transducing direction exceeds the same set The maximum length in the transducing direction between the azimuth direction of the continuous strip to convert the polarity.
20. 权利要求14中所述的数据存储系统, 其特征在于伺服译码器的定位信号中包含一个值的序列,并且若伺月良译码器在读头信号中指示了错误状态,则伺月良控制系统把当前定位信号的值替换成从在错误状态之前产生的一个或多个信号值推导出的值。 Data storage system according to claim 20. 14, characterized in that the servo decoder localization signal sequence contains a value, and if the servo decoder indicates month benign error state in the read head signal, the servo month good control system to replace the value of the current into the positioning signals from one or more signal values before the error state resulting derived values.
21. 权利要求20中所述的数据存储系统,其特征在于替换值是在指示错误状态之前伺服译码器产生的最后定位信号值。 Data storage system according to claim 21. 20, characterized in that the replacement value is the final positioning of the servo decoder before the error signal value generated in the indication.
22. 权利要求21中所述的数据存储系统,其特征在于伺服控制系统还进一步含有一个或多个附加读头用于读M储介质上相应的附加伺服模式并产生表示附加伺服模式的相应附加读头信号;系统还含有一个或多个相应的附加伺服译码器,用于接收附加的头信号并对其if码以产生相应的附加的定位信号指示附加读头相对于伺服模式的位置,并且伺服控制系统将放弃的当前定位信号的值替换成从不在错误状态之中的一个或多个附加伺服定位信号的值推导出的值。 Data storage system according to claim 21, characterized in that the servo control system further comprises one or more respective additional servo patterns on the storage medium M to read the additional read head and generating an additional servo pattern showing the corresponding additional read head signal; system further comprises one or more respective additional servo decoder, for receiving the additional header signal and gain if additional code to generate a corresponding position signal indicates the position of the additional read heads relative to the servo pattern, and the value of the servo control system will abandon the current position signal or value is never replaced by a value derived in an error state among the plurality of additional servo positioning signal.
Description  translated from Chinese

伺服控制系统及数据存储系统 Servo control system and data storage system

本申请是1995年4月2S日提出的、趙为"用于磁带系统的基于定时的伺服系统"的中国专利申请No. 95104774.4的分案申请, 技术领遍 This application is April 1995 filed a 2S, Zhao is "for tape systems based on the timing of the servo system," the Chinese Patent Application No. 95104774.4 divisional applications, technical lead times

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.

背景技术 BACKGROUND

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 the conversion 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,这两种模式与数掘磁道相对准而记录。 The servo head servo pattern along the edge between two different movement, these two modes is aligned with the track number TUNNELING 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沖串,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 that are often referred to 〃 〃 half tracks. 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 Can be determined immediately with a half-width of the servo head, putting half of the track moved across the central position in order to reach the central square to which

向移动头。 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—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 with the same - of heads. 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fie/ir的美国专利iV仏3,686,649中描述了对半磁道伺服控制系统方法的另一种可逸方式,它描述了一个使用词服控制信息的盘驱动器伺服控制系统,词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词服磁道宽度的磁通转换线。 Described in the fie / ir iV Fo US Patent 3,686,649 in another way to escape the half track servo control system approach, it describes a service control information using word disk drive servo control system, the word service the control information includes a line parallel to the disc from the same radius line into two directions at different angles extend through clothing track width word line magnetic flux transitions. 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. 一个控制头检測一个由第一次转换产生的正向脉沖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沖定位信号,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. This

系统据称可允许存储盘上每英寸多于200条磁道。 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各要求有越来越大的存储密度。 However, disk storage devices and tape storage devices each requiring increasing storage density. 例如,常規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糸统的环境那样清洁,并且,与盘系统不同,磁带运转时同磁头实际接触。 In the tape storage system, the contact surface of the storage medium / head is not as clean as the disk system which the environment, and, with the disk system, the actual contact with the head when the tape running. 相对不洁的环境和介质与头之间的接触,还有词服头相对大的宽度,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 first word serving a relatively large width of the media and the servo head to produce 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,这或是随时间逸渐磨损的结果或是由于污染的碎屑之间脉沖串相互作用的结果。 As a result, the servo control of the servo head spatial response information changes with time, or the result of this escape gradually over time or due to 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镨,以至于当伺服头实标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镨误配准。 Changing the servo head space of the reaction such that a difference in the positioning signals praseodymium, so that when the first real standard servo servo track has deviated from the centerline, a positioning signal may indicate that the track did not happen praseodymium mis-alignment. 要将定位信号中的差镨从定位信号本身检测出来是非常困难的。 To the positioning signal from the positioning difference praseodymium detected signal itself is very difficult. 所以常常使用冗余词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 I often use the word redundancy to improve reliability track suits, 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 From the above discussion, it is clear there is a need particularly suitable for a tape servo system

控制系统以降低由于伺服头的磨損和碎屑造成的定位信号差错的 Control system to reduce the signal error due to the positioning of the servo head and debris resulting from wear of

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. 发明内容 Amplitude, and makes it easier to detect errors in the positioning signal, the present invention satisfies this need. SUMMARY OF THE INVENTION

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 The present invention, a magnetic media storage device according to a track following system or from a

更多个特殊模式的伺服磁道中得到头定位信息。 More particular patterns obtained in head positioning servo track information. 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沖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糸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 system which is used for the servo velocity constant localization 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糸。 Read by a servo read head and the head of the relative timing of the conversion of the relative position of the center of the track into a linear relationship deserves. 通迚确定两个定时间隔之间的比率来提供速度恒定性。 Through 迚 determine the ratio of two timing intervals between to provide speed constancy. 具体讲,可通过使用在相同转换间測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镨检測和校正。 In another aspect of the present invention, by identifying the pattern sequence to complete the difference praseodymium 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镨误的伺服磁道读取。 Also, timing in a servo pattern sequence must match with different intervals a known format; match within certain parameters of failure means praseodymium erroneous servo track reading. 在检測到某些镨误后,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,或通过其它方法来枝正镨误信息。 Upon detection of certain praseodymium error, the system can be replaced by a different information (redundant) servo track on, or a temporary replacement information with the estimated value, or by other methods sticks are praseodymium error information.

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氡体环磁头结构上用称作光刻 In one feature of the present invention, the first pattern through the gap in an iron ring head structure with radon body called photolithography

的技术镀一层坡莫合金来产生。 Technical plated permalloy layer to produce. 流经写头线團的电流脉沖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镨误的定位信号引起的跟踪差镨。 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 error difference Pr Pr positioning signal due to induced. 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镨。 If the servo read head is narrow internal defects, the servo read head or storage medium servo pattern and produces less wear praseodymium poor positioning. 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測误差。 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i伺赈餘制系统检測具有第一转换极性 In another aspect of the i-system servo relief than detecting the present invention has a first polarity conversion

的磁逋转换而忽略具有第二转换极,汰的磁通转换。 Bu conversion ignore magnetic pole, eliminating the magnetic flux transitions having a second conversion. 这样,伺服控制 Thus, servo control

信息模式組只在具有相同极性的转换间给予定时。 Information Mode group only has the same polarity between the timing of the conversion to give. 这就避免了由于 This avoids the

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 Characteristics of the servo write head fabrication, the actual servo control information writing process in the tape

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 Opposite polarity conversion timing of the read head itself and asymmetries that may occur in

偏移。 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 If desired, by using redundant second opposite polarity switching to feed

一步提高信噪比. 附困说明 Further improve the signal to noise ratio. Attached sleepy Description

通过下面对辱佳实施方式的描述,本发明的其它特征和优点将 The following description of the best embodiment of shame Other features and advantages of the invention will be

会很清楚,以下用举例的方法描述了本发明的原理。 It will be apparent, by way of example the following describes 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視困。 Figure 1 is a perspective view of the present invention constructed in accordance with trapped tape drive storage device and associated tape cartridge.

困2是一个表示困1所示的带驱动容和带盒組合中磁头和伺服控制系统的原理困。 2 is a diagram showing the principle difficulties with drive capacity and cassette combinations shown in a sleepy head and servo control system sleepy.

图3是一个表示根据本发明的可选择的磁头组件的原理图。 Figure 3 is a schematic diagram showing an alternative in accordance with the present invention, the magnetic head assembly. 困4,5和6表示根振本发明构造的三种可选的伺服模式。 4, 5 and 6 show the root sleepy vibration present invention constructed three optional servo mode.

图7困示了由齒2中所示磁头产生的伺服控制信号。 Figure 7 illustrates a servo control signal trapped by the magnetic head shown in the teeth 2 production.

困8表示伺服头跟踪困6中所示伺服摸式的轨迹和它产生的 8 shows the storm tracking servo head shown trapped six touch-type servo tracks and it produces

头输出信号困。 The output signal sleepy head.

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

困10,11和12是用于困2中所示伺服控制系统的定位信号 Sleepy sleepy 10, 11 and 12 for the servo control system in Figure 2 localization signal

译码器的框阁。 Court decoder box.

困13,14,15和h6是用于圃2中所示伺服控制系统的一种可逸的定位信号译码器的框困。 13,14,15 and h6 is a sleepy garden servo control system shown in two positioning signal decoder box one can escape the storm.

困17表示词服头跟摔困9中所示伺服模式的轨迹,同时表示了它产生的头输出倌号和相应的A和jB信号间隔。 17 shows the word sleepy head with clothes fall storm track servo pattern in Figure 9, also said it produced the first number and the corresponding output groom A and jB signal interval.

困18是一张存储于困13所示系统中用于解调困17中所示伺服模式的数据表。 18 is stored in a sleepy sleepy system shown in Figure 13 for demodulation trapped 17 servo pattern shown in the data table.

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

團20表示可被團19中所示茅:统记录于一部分磁带上的磁通转换。 Group 20 may be represented as shown in group 19, Mao: magnetic flux transitions recorded in the system on the part of the tape.

困21表示可用于记录困9中所示伺服模式的一个多间隙头。 21 shows a multi-gap sleepy head can be used to record the servo pattern shown trapped 9. 困22是困21所示头的一个横截面。 22 is a sleepy sleepy head a cross-section in Figure 21. 困23是困21和22所示头的伺服模式间隙域的平面图。 23 is a plan view of a sleepy sleepy head 21 shown in Figure 22 and the servo pattern gap domain. 困24是一个表示根据本发明枸适的用于写磁带的伺服写头的原理困。 24 is a diagram showing the principle trapped citrate according to the present invention suitable for writing a tape servo write head trapped.

困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闺. 25 is a representation trapped generating magnetic tape recording system used in the present invention according to the principles Gui.

困26是困25所示记录系统的原理困. 具体实k方式 26 is shown sleepy sleepy sleepy Principle 25 of the recording system. Specific ways k

團1表示了一个根据本发明构造的基于定时的伺服系统。 Group 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连接到主处理器16。 This system includes a receiver with a data tape cartridge drives 14, the latter is connected to the main processor 16 via a data cable 18. 带盒包括一个含有一巻磁带20 Cassette comprises a cassette 20 containing a Volume

的盒子19。 Box 19. 为使用賴服控剩银息所构造的本系统包含一个磁通转 Lai control using leftover silver dress constructed interest in this system consists of a flux transfer

换的重复伺服模式,此模式记录子數据举盒中磁带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词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。 In other repeating servo pattern, this pattern of sub data recording tracks 20 act on the cassette tape, and extends across the width of the track so that by reading the word serving as a magnetic servo read head in the translational direction when moved across the track width control A servo positioning information signal information generated constantly changing, this indicates the relative position of the head of 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 The tape drive 12 can read the servo control information and generate a position signal to the control bit data of the read head

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。 Is set, or using a magnetic servo write heads to the servo control information on the data written to the tape cassette track, or to do both. 这个系统加以最优化以便用于磁带环i克,以使由于 The system to be optimized for use with a tape loop i g, so as a result of

磨損和碎屑引起的定位信号差镨的幅值降低并且这种差错易于检测。 Praseodymium positioning signal amplitude difference caused by wear and debris is reduced and such errors easily detected.

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/fl似公司的"PS/2"个人计算机,或一台工作站如/fiM公司的"及S6000"工作站,或是一台小型机如/BM公司的"AS400"计算机。 Host processor 16 includes, for example, a personal computer, such as / fl company like "PS / 2" personal computer or a workstation as / fiM's "and S6000" workstation, or a minicomputer as / BM'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/丑3f公司的"3480"和"34 90"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 / ugly 3f'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8附m,4wm,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 8 attached m, 4wm, 1/4-inch and 1/2 inch data cartridge formats.

图2是带盒14(困l)中磁带20的一部分通过带驱动装置12 的一个磁头組件24的俯視困。 Figure 2 is a tape cartridge 14 (trapped l) and a portion of the tape 20 is trapped by a plan view of the head assembly 12 of the tape drive device 24. 在剖視困中用虛线表示出带从哪里^f兹头组件下面通过。 Trapped with a dotted line shows where ^ f hereby head assembly in a sectional view through the following. 磁头组件用实錄示并包括一个用^"测记录千带上的伺服磁道27的相对窄的伺服读头26 。为了困示相对大小, Record shows with head assembly and includes a read head 26 with ^ "measuring tape recording thousands of relatively narrow servo servo track 27 in order to show the relative size of the storm,

同时表示出的A,位于包含多个数振磁道的带中数据磁道域29之 Simultaneously with the data track region shown in A, the number of vibration located comprising a plurality of tracks 29

上用于读取记录于数据磁道上数据的磁头组件中的一个数据读头28 。 For reading the data recorded on the data track of the magnetic head assembly in a data read head 28. 为简化叙迷,困2給出了一个单个的伺服读头和一个单个的数据 To simplify the Syrian fans, sleepy 2 shows a single servo read head and a single data

读头。 Read head. 熟练的技术人员僅得大部分带系统具有多个伺服磁道,多个 Skilled artisans only have most belt systems have multiple servo tracks, multiple

词服读头,多个数据读和写头。 Words clothes reader, multiple data read and write heads.

在图2中,所指示的词服磁道中心线30沿带20的长度延展。 In Figure 2, the word serving 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标上小于伺服磁道27 的宽度。 Figure 2 shows the servo read head 27 is less than the width of the servo track on the relatively narrow and the width of the real standard. 具体讲,在最佳实施方式中词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, in the preferred embodiment, the word width of the read head serving smaller than one half the width of a single data track (not shown), which is typically narrower than a servo track.

在困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 trapped 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,伺服读头检測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传送给磁头组件24。 The servo controller generates a servo mechanism control signal and by means of a control line 42 is transmitted to the magnetic head assembly 24. 一个 A

磁头组件的仴月艮机舰it^平移方向上移动头26使之越过祠服磁道30的宽度来响应来自伺服控制器的伺服信号。 Moving the head 26 to make it across the track width of the Temple service 30 responds to the servo signal from the servo controller on 仴 month Burgundy machine translation direction ship it ^ head assembly. 伺服控制器40监視来自佶号译码器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。 Positioning signals from the servo controller 40 monitors the number Ji and decoder 36 generates a control signal reaches the desired destination, so that the control signal when the head reaches the desired target equivalent to this signal.

困3表示了根据本发明构造的一个多词服磁道、多头系统。 3 shows the storm constructed according to the invention more than one word track suits, long system. This

系统除下列方面外同图2所示系统4M目似。 System except the following aspects of the same system as shown in Figure 2 4M head like. 图3中的磁头组件24,包 Figure 3 a magnetic head assembly 24, including

括一个数据读头28d和一个数据写头2幼,分別用子在举数接城 Includes a data read head 28d and a data write head two young, were connected with the child in the city held several

29的数据磁道上读和写数据。 29 read and write data on the data track. 困3所示的带20,除第一伺服磁道 Figure 3 storm with 20, with the exception of the first servo track

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 Addition to 27 further comprising a second servo track 27 ,, these servo tracks is placed in the data

域29的相对两側。 29 on opposite sides of the domain. 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 '. 困3中石兹头组件24,也包括一个用于读取记录于第二伺服磁道27,的伺 3 trapped in stone hereby head assembly 24 also includes a servo for reading recorded in the second servo track 27, the

服信息的第二伺服读头26,。 Service information of the second servo read head 26 ,. 应注意磁头组件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. 磁头组件通过信号线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,的何服信号提供给相应的译码器36'。 The head assembly provided to a respective decoder via a signal line 34 to read the servo signal from the servo head 26 of the first 36 and 34, the Servo signal from the second servo read head 26, is supplied to a corresponding decoding through a 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,为了叙述的目的困3中只给出了单独的一对。 Should be noted that most of the belt system comprising a plurality of data read heads and write heads, for the purposes described in the storm 3 gives 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迚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。 As mentioned above, according to the present invention & apos servo pattern comprising a servo track width to extend across the magnetic flux transitions, so that the servo read head when the servo read head as the shift 迚 width of each servo track pattern generated by reading signal will be constantly changing. 困4,5和6給出了根据本发明的伺服模式的几种可逸实施方式。 4, 5 and 6 show trapped several servo pattern according to the present invention can escape embodiments. 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測产生伺服读头信号的 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, the edge strip comprises means for detecting generating a servo read head signal

磁通转换。 Flux conversion. 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 When the servo read head over the converter, which generates a polarity determined by the polarity of the conversion pulse

沖。 Chong. 例如,伺服头可以在每个条的前沿(遇到一个条时)产生一个正脉沖,在后沿(离开一个条时)产生一个负脉沖。 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,在團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 group 4, the servo pattern 44 comprises a sequence of alternating strips across the width of the first tracks 46 extend substantially perpendicular to the direction of the track with the conversion, and the second section 48 with respect to the read head has an oblique. 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. 困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。 5 trapped in the pattern shown by 50 includes a first section and a second section 54 consisting of 52 alternating sequence, the first straight section 52 and the vertical centerline of the track, the second man-shaped strip has 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亙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546 。 That is, the model contains 50 tracks which is characterized by a two-phase formation through effects on the grounds, each track contains herringbone leg 54a or the other leg 546. 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亙影响的两个伺服磁道的条。 Clearly, patterns 56 may be considered as comprising a relative phase through a center line of the impact of the two servo track strips.

对于图4一6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 For each of the servo pattern in FIG. 4 shown a 6 44,50,56, 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 servo read head signal, these peaks with peak-to-peak cycle head

在平移方向上移过磁道的宽度而变化。 In the translational direction and moved across the width of the track changes. 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4一6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J5间隔,它们被用来产生一个独立于带速的定位信号。 The servo pattern shown in Figure 4 a 6 44,50,56 comprises defining a first and second strips of the first and second intervals, respectively, labeled as A intervals and J5 interval, 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4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, a four 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,fl间隔是恒定的,而与位置无关。 It should also be noted that only the A intervals change, fl interval is constant, regardless of position.

这样,在困4中,将被称为Al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Bl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42,43,...和52,53,...。 Thus, the trapped 4, will be referred to the first A interval Al extend from the first perpendicular stripe to the first stripe having an azimuthal slope, the first B interval Bl from the first perpendicular stripe extend to the second perpendicular stripe, can also define the servo pattern intervals after 42, 43, ... and 52, 53, .... 固5中,第一个A间隔Al从一个垂直的条延展至第一个人字形的条同时第一个fi间隔fil从第一个垂直的条延展至第二个人字形的条。 Solid 5, the first A interval Al from a vertical stripe extended to the first person at the same time the first strip-shaped fi fil interval from the first vertical bars extend to the second person shaped bar. 第二个间隔i?2从第二个垂直的条延展至第三个垂直的条。 The second interval i? 2 from the second vertical bars extend to the third vertical bars. 困6中,第一个A间隔Al,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"个人字形,同时第一个fi间隔Bl,从第一个菱形左边部分延展至第二个菱形右边部分。第二个4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。第二个B间隔52从第二个菱形的左边部分延展至第三个菱形的左边部分。应注意最后 Sleepy 6, the first A interval Al, from containing the first part of the first man-shaped diamond left extended to include the first diamond on the right lower part of the "individual glyphs, while the first interval fi Bl, from a diamond part to extend to the left of the right portion of the second diamond. 4 second interval A2 extend from the left part of the second diamond to the right side portion of the second diamond. The second B interval 52 from the second diamond extended to the left part of the left part of the third diamond should be noted that the final

一个条没有用来定义一个间隔。 A bar is used to define an interval no.

報掘末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。 Reported digging end the invention provides a servo control system for an apparatus for determining the relative position of the servo read head and the servo pattern start and end points. 姨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镨检測,如果希望的话,也可完成差镨校正。 Determine the location within aunt style bar feature enables the system to get the next one will be read and complete detection of poor praseodymium, if desired, can also be done praseodymium poor calibration. 例如,在困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 trapped 4 44 shown in 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,由伺服译码器所检測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,同步特征在条組之间含有空闲间隔。 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組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 strip can be made in the conversion does not occur in the direction of the maximum interval is larger than the interval between any two strips of the group. 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組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組被称作"伺服脉沖串"。 Article contiguous free space between the group is called "servo bursts." 每个伺服脉沖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镨检测和校正。 Each servo burst contains a number of bars and conversion, described further below their detection and correction for the difference praseodymium. 当高效地利用了带介质时,每个脉沖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,在困4中,困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 a sleepy 4 sleepy shows a first servo pattern group 66 and a second group of 68 servo pattern. 第一和第二种伺服摸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 servo touch-type group consisting of a synchronous features a free 70 separate intervals. 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,困5给出了伺服脉沖串74 ,76 之间的一个空闲间隔72 ,團6给出了伺服脉沖串80,82之间的一个开始间隙78。 Similarly, sleepy 5 shows the servo bursts 74, 76 between an idle interval 72, having 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.

真引起的不穗定,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fl间隔定时。 Is not really due to spike set, the control system according to the invention having only the same polarity between magnetic flux transitions A and fl interval timer. 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 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 heads special

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。 Other disadvantages of the shift in timing can cause 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镨。 Only during the same polarity conversion timing, timing difference can be eliminated due to the different polarities between praseodymium caused. 例如,只有如读头在通过条的前沿时产生的转换脉沖可以使用。 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沖被忽略。 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,将提供一个冗余词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 this case, the service will provide a redundant word mode 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.

困7表示当图2所示的磁头读取固4所示的伺服模式时产生的模拟伺服读头仿号84 。 7 shows analog servo trapped generated when the head shown in Fig. 2 reads the servo pattern illustrated in solid 4 heads imitation No. 84. 固7表示出当伺服读头越过團4的第一条的前沿时出现了第一个伺服读头信号峰值86 。 Occurs when the servo read head over the first four groups when the leading edge of the solid 7 shows the first 86 servo read head signal peak. 当伺服读头越过困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 sleepy 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測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.

團8表示一条伺服读头所沿路径的困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4和fi间隔。 8 represents a group of the path of the servo read head 6 along trapped diamond pattern, in which the following is the corresponding servo read head signal 92 generated by the magnetic servo read head over the servo pattern stripe, and 4 and fi indicates the interval. 如上所述,每个连续的4间隔称作41, A2,等等,B间隔类似地称作fll,B2,等等。 As described above, each successive four intervals is called 41, A2, and so on, B intervals similarly referred fll, B2, and so on. 困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。 Generating a positive peak 8 represents trapped when moved over each of the bars and defined pattern interval, and for generating positioning signals and determine the timing interval when 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.

困9给出了一个可选的嵌入式的,或交镨的菱形模式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fi间隔。 Sleepy 9 shows an alternative nested, or post praseodymium 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 indicate the A and fi interval. 交镨的菱形模式包含一个由一組人字形转换构成的五个交镨菱形的序列,随后跟有四个交镨的菱形。 Cross praseodymium diamond pattern contains a sequence of five cross-praseodymium diamond by converting a set of chevron configuration, and then followed by four diamond-shaped cross-praseodymium. 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組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镨組内任意两个同类条之间的间隔并且位于任意两組之间。 Praseodymium group interval between any two similar strips in each group by a relatively short spacing intervals separated by 99, the width of the narrowest point of the gap is greater than a cross FIG five and four diamond-shaped diamond in Fig. 9 and is located between any two groups. 不具有转换的另一类型的模式间隙位于图9模式中的一組菱形内部,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, In contrast,

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条組或两个5条組之后,所以可被识別出来。 Because idle interval after only 99 have the same number of sequences of the two appears as four groups after two or five groups of two, so I can be identified.

團9给出了最佳实施方式中的伺服模式。 Group 9 shows the preferred embodiment of the servo pattern. 尺寸如下:转换方向上的带宽2. 5"w。一个组内条的区间为5"m。 Dimensions are as follows: Bandwidth 2.5 Conversion direction ". W range for a group of the 5" m. 伺服模式垂直于转换方向的宽度为408"m,分成宽为204"加的对称两半。 Change the direction perpendicular to the servo pattern width of 408 "m, a width of 204 into a" plus two symmetrical halves. 条相对于转换方向的垂线倾斜成7。 Article with respect to the vertical direction is inclined converted into 7. 4度角。 4 degrees. 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IOhw; 4菱形组中的内部间隙为15w附;5菱形組中的内部间隙为10/w 。 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 IOhw; 4 diamond group internal gap 15w is attached; 5 diamond group internal clearance of 10 / w.

困9圉示出一个A间隔定义为从一个菱形左侧的一条延展至这个菱形右側相应的条。 9 shows the storm yuzhen A interval is defined as an extension of a diamond from the left side to the right side of the diamond corresponding article. 例如,第一个A间隔Al从第一个菱形左側的第一条延展至这个菱形右側的第一条。 For example, the first A interval Al 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间隔从一个菱形左側的一条延展至下一个菱形左側相应的条。 B interval corresponding to extend from one to the left of a diamond a diamond on the left side under the corresponding article.

固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。 Pattern 9 as shown in solid 94 to maximize the use of the length of the track to generate the positioning signal. 模式每隔221m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221m。 Mode every 221 m repeat, so a longer period compared to other sampling intervals shown in servo mode, the sampling interval length is only 221 m. 因为困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測。 Because the storm 9 diamond servo pattern for each interleaved contains a certain number of pieces, the synchronization feature several idle interval can be calculated through the servo read head to detect. 把模式分成四个菱形后跟五个 The model is divided into four diamond followed by five

菱形的組使得译码器可确定头在转换方向上相对于磁道的位置。 Rhombic group makes the decoder may determine the position of the head to the track in the transducing direction relative. 更具体讲,即使在译码器錯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沖串,然后又是两个五条的脉沖串,如此这样循环。 More specifically, the decoder missed even in a case where it is possible under synchronize itself, because it can expect after receiving two bursts of five, next will receive two bursts of four, then is two five bursts, so the cycle. 这个优点可用于实施一个相对簡单的差镨检測和校正方案。 This advantage can be used to implement a relatively simple difference praseodymium detection and correction scheme.

图9所示模式94的尺寸给出了一个最佳设计,它平衡了三个词服要求:词服模式宽度,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 the requirements of clothing three words: words clothing pattern width, the sampling frequency and position signal noise. 模式宽度(图9中标示为408"m)确定了词服读头信号的范围。这个范围可以是几个数据磁道的宽度(未表示出)。在这个实施方式中伺服模式的宽 Pattern width (FIG. 9 labeled 408 "m) to determine the scope of the word serve the read head signal. This range can be the width of several data tracks (not shown). In this embodiment the servo pattern width

度大约等于八个数据磁ii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。 Of approximately equal to the width of eight data magnetic ii, 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221"m 。它在这段空间中产生两个数据点,一个在间隔fi4的末端,一个在间隔fi8的末端。在大约2。 OwA的典型带速下,这就产生了一个每秒18,100次采样的頻率。 采样频率的要求由伺服回路的其余部件确定。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。 In the preferred embodiment, the servo pattern length of 221 "m. It generates two data points in this space, one end of the interval fi4, and an interval end fi8 In a typical tape speed of approximately 2. OwA next, which produces a frequency of 18,100 samples per second sampling frequency is determined by the requirements of the remaining components of the servo loop. If the sampling frequency is too low, must reduce the dynamic response of the circuit to be used in the system to maintain precise control sufficient loop phase margin stability.

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 Some factors, such as media noise and electronic noise determines the conversion between

隔定时度量中的噪音并较大地独立于模式的尺寸。 Interval timing and noise in large measure 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,所測量转换的数目影响到定 Due to averaging, the number of the measured impact converted to fixed

位信号噪音。 Signal noise. 在图9所示的模式94中,每次采样測量四个A和fl 间隔。 In the pattern 94 shown in FIG. 9, the four measurements per sample interval A and fl. 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 In the decoder, these four measurements are averaged to produce the sampled positioning

信号。 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 Under section contains more and so there is more conversion mode, the noise can be reduced by increasing the average value, but this will require a longer pattern, which in turn reduces

了采样频率。 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,降低了采样频率。 However, increasing slope also makes the servo pattern longer, reducing the sampling frequency. 应该注禽,增大的倾斜度由于方位角的損失削弱了来自伺服读头的信号强度。 It should be noted poultry, increasing slope due to azimuth loss weakens the 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. 困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 Pattern shown in storm 9 94 shows an optimal design, however, the skilled artisan can readily adjust the pattern layout and dimensions

提出不同目标的设计。 Proposed different design goals.

图lO,ll和12给出了困2中所示信号译码器36的框图。 Figure lO, ll and 12 shows the block diagram shown in signal decoder 36 2 storm. 由下面的进一步描述,译码器最好包含差镨检测和校正电路。 By further described below, the decoder preferably comprises praseodymium difference detection and correction circuit. 熟练的技术人员会僅得这两个劝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 be able to persuade only have two or provided by the same circuit provided by separate circuit modules. 圉10所示译码器36通过线34接收如困7所示来自伺服读头的模拟伺服读头信号并使用峰值检測器102把这个信号转化 Yuzhen 10 decoder 36 receives via line 34 as shown in Figure 7 sleepy analog servo read head signal from the servo read head and using a peak detector 102 this signal conversion

为脉沖逻辑信号。 Logic pulse signal. 在最佳实施方式中,峰值检測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,以使得译码眾区分 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 distinction between the public decoded

两个极性。 Two polarities.

如上所述,定位信号由一个数字信号译码器36(困2 )进行译码。 As described above, the positioning signal by a digital signal decoder 36 (sleepy 2) are decoded. 译码器的劝能是测量A和B的时间间隔并进行必要的计算以 Decoder can advise is to measure the time interval between A and B and make the necessary calculations to

使得定位信号可用于伺服控制系统的其余部分。 So that the positioning signal may be used to the rest of the servo control system. 此外,差镨检测和校正可在译码器内实施。 In addition, the detection and correction of difference praseodymium 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軟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. 为了困示的目的,图10和11表示了一个用于困4所示条简羊模式所用的译码器和差镨校正电路。 For purposes of trapped shown, Figures 10 and 11 shows a strip for sleepy decoder 4 shown in the correction circuit and the differential praseodymium Brief sheep modes used.

图7表示作为读取图4所示模式的结果从一个词服读头得到的模拟信号。 Figure 7 shows the resulting pattern shown in Figure 4 is read from the read head was serving a term analog signals. 如图10所示,这个模拟信号由一个峰值检測器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 The decoder is designed to only one polarity peak to trigger all the interval timer, the polarity of the previously discussed

的磁转换的一个羊个极性相一致。 A sheep polar magnetic conversion coincide.

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 A

开始计数器104通过寻找比在一个脉沖串中所允许的最大值还长的无转换间隔来检測起始间隙70(见困4)。 Counter 104 begins by finding the ratio of the maximum value in a permitted burst no longer detect the starting transition interval to the gap 70 (see sleepy 4). 当检測到一个起始间隙后,重置同步和控制电路lll以开始译码下一个新的脉冲串。 When a start gap is detected, synchronization and control circuit lll reset 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4 Each encounter servo mode peak that appropriate incentives and reset the counter on the appropriate 4

和JS间隔定时。 And JS interval timer. 一个单个的"^"计数器106定时每个A间隔。 A single "^" counter 106 times each A interval. 因为连续的fi间隔是邻接的,并且输出计数器的和与重置计数器需要 Because successive fi intervals are contiguous, and the output of the counter and reset the counter and needs

一定的时间,所以两个"r,计数器n 108和iio交替地对b间隔定时。所期望的定位信号是a和b的比率,它由以下的示例电路 A certain time, so the two "r, a counter n 108 and iio alternately timed interval b. The desired position signal is the ratio of a and b, it consists of the following example circuit

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),使用一个带有及OM查询表的乘法器是有益的。 Calculated: Because full digital division operation requires huge circuit, when the smaller value of b range requirement (assuming tape speed vary within a defined range), with the use of a look-up table and a multiplier OM is beneficial. 5的值(两个r计数器之一的输出)由一个i71/ 72计数器逸择器112逸择并通过一个/?OAf查询表116转化为一个1/b值,及OM查询表的输出在一个乘法器114中与A相乘。 5 value (r counter to one of two output) by an i71 / 72 counter Yat Yat Optional Optional 112 by a /? OAf lookup table 116 is converted to a 1 / b value, and OM output in a lookup table 114 multiplied by the multiplier A. 这样,原始定位信号118包含每对A和j?值完成时的值A (每个脉沖串中有8次)。 Thus, the original positioning signal 118 contains each pair of A and j? Value A value at completion (each burst has 8 times).

團ll给出了一个同困10中所示译码器一起使用的实标差镨检測和校正电路的框困。 Group ll gives a real difficulties with scaling the difference praseodymium detection and correction circuit 10 shown in the decoder used with the frame trapped. 困示电路对每个脉沖串处执行差错检測, Sleepy show circuit performs error detection for each burst at

并为每个脉沖串输出一个单个的定位信号。 And for each pulse train output signals to a single location. 在没有发现差镨的情况下,脉沖串的输出为在脉沖串中发现的八个羊独A/fi值的平均值。 Eight sheep alone A / fi average value found no difference in the case of praseodymium, burst output found in the burst.

如果检测到了一个差镨,一个简羊的方法是用最近的无差镨值替换当前的錯误脉沖串输出值。 If it detects a difference, praseodymium sheep is a simple method to replace the current value of the pulse train output error-free with the latest value of the difference between Pr. 这些功能如下完成:一个转换计数器120对每个脉沖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,大部分差镨包括偶尔检測到一个额外转换,或漏检一个合法转换,都是由于嗓音,遗漏,碎屑或其它原因造成。 Determined experimentally, most poor praseodymium including occasionally detected an additional conversion, or missed a legitimate conversion, are due to voice, omissions, debris, or other causes. 当这些镨误发生时,转换计数器将每个脉沖串的转换数计数非正确数目(本例中为18),并将输 When these praseodymium error occurs, converting the counter to convert a count of the number of each burst incorrect number (in this case 18), and the output

出一个差镨信号。 Praseodymium signal a difference. 附加的差镨检测通过比较在所述脉冲串中产生的 Additional Pr detected by comparing the difference in the pulse train generated

八个A/B值的连续值来完成。 Eight successive values of A / B values to complete. 一个偏差系加器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 A bias line adder 124 pairs of eight A / B values, and subtracts the remaining four of four summation, give an indication of eight values ranging process

度的偏差结果。 The degree of deviation results. 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产生一个镨误信号。 If this deviation exceeds a predetermined limit, a deviation limits detector 126 produces an error signal Pr. 这些差镨信号由一个差镨门/控制逻辑121处理,当没有检測到差镨时,这个逻辑在线122上产生一个脉沖串数据准备好信号以发出脉冲串来指示来自脉沖串平均累加器128的正确脉沖串数据的可用性。 These difference signals by a differential praseodymium Pr gate / control logic 121 processes, when no difference is detected praseodymium, generates a burst data ready signal on line 122 to the logic burst sent to an instruction from a burst average accumulator 128. correct burst data availability. 如果检測到一个差镨,新的脉沖串平均数据被拒绝,并用最新的无差镨值替换,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样器132。 If it detects a difference praseodymium new burst average data is rejected, and no difference with the latest praseodymium replacement value, which is done by a latch, it is the average of the latest correct bursts from the accumulator 128 is provided to a Data sampling 132. 一条脉沖串差错线123指示当前输出值是一个新的无差镨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 value or no difference praseodymium a previously saved values.

伺服控制系统利用脉沖串差镨线123和脉沖串数据准备好线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 difference praseodymium 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,在检測到一定数目连续的差镨后或超过一预定时间间隔后还没有新的无差镨数据,则系统会拒绝定位数据。 For example, after detecting a certain number of consecutive poor praseodymium or exceeds a predetermined time no new no difference praseodymium data interval, the system will reject the positioning data. 当出现这种镨误状态时,系统将逸梓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镨数据,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 praseodymium, the system will receive positioning signals Zi Yi data from another redundant servo track, or if there is no servo tracks produced no difference praseodymium data, the system may prohibit write data to avoid write outside the track The new data and the possibility of accidental erasure of data on the adjacent track. 固12困示了这样一种结构。 12 trapped solid showing such a structure.

困11所示的电路在检测到一个差镨时可仅通过以最新无差错 11 trapped circuit when it detects a difference praseodymium by only the latest error

值的替换来完成差镨校正。 To complete the replacement value difference praseodymium correction. 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给出了用来确定脉沖串数据信号应被认为是合法还是非法的鉴别器电路140的框困。 Figure 12 shows the data used to determine the burst signal should be considered legal or illegal sleepy discriminator circuit box 140. 一个超时定时器142和一个连续差镨计数器144从线122上接收脉沖串数据准备好信号。 A timer 142 and a continuous differential praseodymium counter 144 receives data from a burst ready signal line 122. 脉沖串差镨确定信号从一个如图11所示的差错门/控制电路接收。 Determining the difference between the burst signal from a praseodymium error gate 11 as shown in FIG / 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镨伺服脉沖串信号,则超时定时器向一个差镨门146提供一个差镨信号。 If the timer within a predetermined time interval does not receive a non-poor praseodymium servo burst signal, the timer provides a differential signal to a differential praseodymium praseodymium door 146. 如连续差镨计数器144发现预定数目的连续脉冲串中有镨,则向差镨门提供一个差错信号。 The continuous counter 144 praseodymium difference found a predetermined number of consecutive bursts, there praseodymium, provides an error signal to the differential praseodymium door. 如超时定时器和连续差镨计数器都没有向差镨门指示一个差镨,则认为译码信号是合法的。 Such as timer and counter praseodymium consecutive poor are not indicative of a difference to the poor Pr Pr door, then that decoded signal is legal. 于是一个镇存器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。 So a town 148 deposit is a legitimate data signal 150 is set to high, indicating a legitimate output. 图10—12中描述的译妈器是困示基于定时的伺服模式译码的和差镨检测与校正的原理的一种相对简单的形式。 Figure 10-12 translation mom is described based on a timing of the storm shows the servo pattern decoding and praseodymium difference detection and correction principle is relatively simple form. 本发明的最佳实施方式使用圉9所示的交镨模式,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镨检測能力的综合性能而最优化。 Preferred embodiment of the present invention use yuzhen cross pattern shown praseodymium 9, is obtained in this way has a wide servo track width, high signal to noise ratio, high sampling frequency and a good overall performance difference between the detection capability of praseodymium and optimized.

图13 — 16中以框图的形式困示了根据本发明枸造的一个译码器的最佳实施方式。 Figure 13 - 16 are shown in block diagram form a preferred embodiment of the trapped according to the present invention is made of a citrate decoder. 困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。 17 shows the path of a storm 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镨菱 Model consists of four and five alternating diamond cross praseodymium

形的脉沖串组成,它们之间由起始间隙分开,在起始间隙的最窄处的长度夫子在脉冲宰内遇到的任何间隙的长度。 Shaped composition bursts, separated by start gaps between them, the length of the gap length in any Master starting narrowest gap in the pulse slaughter encountered. 这个由可识別的间隙分开的四个和五个条的爻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 separate four and five bars for the combination group Yao provide periodic synchronization information to the decoder. 因为将被定时的间隔是交替的并且在fl间隔的情况下间隔 Because the intervals to be timed are interleaved and spaced intervals in the case of fl

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。每个子译码器定时四个a和四个b间隔,如困17所示。困17中标以CLRl,CI及2,C?C/n和6>t/r2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。包括间隔定时电路和差错检測电路的子译码器的主电路,在图13 — 16中示出。所示的电路包括差镨检測,但不包括差镨校正,这个问题交给词服控制器用类似上面讨论的原理解决。同样,在这个译码器中没有计算a/J5的商,伺服控制器执行这个劝能。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。 Is continuous, the decoder is divided into two by the suffix "1? Or" 2 "sub-decoders identified, they alternately generated positioning signal information, each information output every other position signal value. Each sub-decoder a and b are four four timing intervals, such as 17 shown trapped. trapped 17 bid to CLRl, CI and 2, C? C / n and the timing point indication 6> t / r2 of each sub-decoder is cleared and generating a time point value comprises a positioning signal interval timing circuitry and error detection circuitry of the main circuit of the sub-decoder, in FIG. 13 -. 16 shows the difference between the circuit shown comprises a praseodymium detection, but does not include the correction difference praseodymium This problem is similar to the word service controller with the principles discussed above resolved. Similarly, in the decoder does not calculate a / J5 quotient, servo controller can perform this advise. The skilled artisan can easily contact these descriptions determining the details of this circuit.

虽然交错的4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羊个的累加器来执行。 Although interleaved 4 and b spaced by respective dedicated clock function, the same function can also be performed by each sub-decoder in one of the accumulator sheep. 例如,第一个子 For example, the first child

译码器中a值的定时如下完成:一个;n累加器(由cx及i )初始时清零为零值。 Timing decoder follows the completion of a value: a; n accumulator (by cx and i) initially cleared to zero value. 一个转换计数器rci在伺服模式内一直跟踪头的位置(由越过多少条来确定)。 Rci a counter inside the servo pattern 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, 一个增量及c?m xi产生一个零值送给累加器;n,保持它的值为零。 ? When the time interval in a position outside the model, an incremental and c m xi produce a zero value to the accumulator; n, maintaining its value is zero. 在其它时间点,转换计数器rci和增量z?OM ;n向累加器;o提供一 In other point in time, the conversion counter rci and incremental z OM;? N to the accumulator; o provide a

个等于当前被定时的4间隔数的增量值。 A current equal to the increment value is the number of 4 timing interval. 累加器jh在每个时钟周期把这个数加到总和中。 Jh accumulator in each clock cycle number is added to the total. 用这种方法累加眾X1用作多路并行定时 In this way all the cumulative X1 as a multi-channel parallel timing

应该注意,累加器:n在间隔完成之后含有四个a值的和,这是用于脉沖串組的所期望的a输出值。 It should be noted, accumulator: n after completion interval contains four and a value, which is a desired output value for the burst group. 与上面所描述的方式相似, 一个fi累加器对四个fl间隔求和。 Similar manner as described above, a four fl fi accumulator summation interval. 一个偏差累加器zn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 zn in such a manner to alternately add and subtract intervals a and b such that if all of a same length and interval b intervals all have the same length when it is zero. 当这些相等 When these are equal

性保持不住时,d1累加器中的和就不等于零。 When sex can not keep her, d1 accumulator and not equal to zero. 标以ZWSV3/AX和 Labeled ZWSV3 / AX and

Z>VM/iV的比较器判断这个偏差是否超出了标示一个錯误状态的预定界限。 Z> VM / iV comparator to determine whether the deviation exceeds a predetermined mark an error state boundaries. 差镨检查也包括转换计数,它由两个幅值比较器i和 Check also include converting the difference praseodymium count, which consists of two magnitude comparators i and

2完成。 2 is completed. 因为每个子译码器的所期望的转换总数(13或14)是不同 Since each sub-decoder converts the desired total number (13 or 14) are different

的,所以为每个子译码器提供独立的计数器和幅值检查器。 And so provide separate counters and magnitude inspector for each sub-decoder. 由s五- By s five -

zj5ct信号来确定当前选择使用哪个子译码器。 zj5ct signal to determine the current select which sub-decoders. 这个信号及困13 中其它信号将联系困14 — 16来进行描述。 This signal and trapped 13 others trapped signal will contact 14--16 to describe.

困13中所示ZMJVl good信号指示在ZM7V1及五A/Xr脉冲 ZMJVl good signal shown trapped 13 indicates ZM7V1 and five A / Xr pulse

(囷16 )发生时对于在K?t/:r和i^t7r数据线上正处理的值讲,转换计数器ro ,rc2或偏差限制电路z)五vm^u:和z)^ym/tv是否 (Granary 16) occurs for the K t /:? R and i ^ t7r data line being processed value speaking, conversion counter ro, rc2 or deviation limit circuit z) five vm ^ u: and z) ^ ym / tv whether

检测到一个差镨状态。 Detects a difference praseodymium state. ZX4rAGO(?Z)线的状态被伺服控制器用于差 State ZX4rAGO (? Z) line is servo controller for poor

镨校正。 Praseodymium correction.

图14图示了尸/f信号和三个称作O4uP,F0C7及和F/V五的其 Figure 14 illustrates a corpse / f signal and three called O4uP, F0C7 and and F / V five of its

它中间信号的产生。 It produces an intermediate signal. PK信号由一个典型的用于磁盘和带驱动器中把模拟佶号转化为数字脉冲的常规峰值检測眾160产生。 PK signal used by a typical disk and tape drives Ji number is converted to an analog peak detection routine 160 all digital pulse generation. 峰值检測器160与用在常规驱动器的检測器有所不同,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測器通常在正向和负向峰值时都产生脉沖。 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測器 Skilled personnel to the preferred embodiment of the peak detector

160应该非常了解,并且不需要进一步解锋。 160 should be very understanding, and no further Xie Feng.

峰值检測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固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 solid rhombus in Fig. 9 divider bar in between. 一个GAP A GAP

信号包含一个脉冲,此脉冲是当检測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測器160的脉沖时,由下行计数器所产生的。 Signal includes 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尸K脉沖, 则下行计数器超时或计数到零。 That is, if the gap length of time after a dead K pulse is not detected, then the down counter times out, or counts down to zero. 对一给定的带速和词服模式大小, 应逸梓一个合适的间隙时间界限。 For a given service mode with speed and word size, should Zi Yat an appropriate time interval boundaries. 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組相隔5 挑,最佳时间界限选为3. 75。 In a preferred embodiment, the belt speed of about 2.0 meters per second, the pattern contains four and five groups separated by 5 pick the best time limits elected 3.75. /mesc。 / Mesc. 结果,产生的GA尸信号在四和五伺服条組之间的每一个间隙处包含一个脉沖。 The results, GA corpse contains a pulse signal is generated in a gap between each of the four and five servo bar groups. 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(困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 (trapped 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. When

在一个模式间隙后检測到四个伺服模式条时,FOl/i?信号变高。 When, after a gap detection mode to four servo pattern stripe, FOl / i? Signal goes high. When

在一个间隙后检測到五个伺服模式条时F/V信号变高。 When a gap is detected after five servo pattern stripes F / V 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FOf/及和脉 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 3-8 decoder input line 3--8 decoder to a skilled technician familiar way to generate FOf / and and pulse

沖信号。 Impulse signals.

图15表示如何使用尸0t7/?,尸/V五和GAP信号来产生主控信 Figure 15 shows how to use the corpse 0t7 / ?, corpse / V five and GAP signal to generate a master letter

号ot/ri,0t/r2,cx及i和cx及2。 No. ot / ri, 0t / r2, cx and i and cx and 2. 对于图9所示的模式,在每个空闲 For the pattern shown in Figure 9, in each idle

间隔99处产生Ot/ri和0LT2信号,而在内部间隙98处产生CX及1和CX及2信号。 Interval 99 to produce Ot / ri and 0LT2 signals generated CX and CX 1 and 2 signals and internal clearance 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. CMP信号提供给四个触发器172,176,178,188的时钟输入。 CMP signal is supplied to the clock input of four flip-flops 172,176,178,188. 反向的F/V信号提供给第一个触发器172和一个或门174。 Inverted F / V signal is supplied to a flip-flop 172 and an OR gate 174. 无论何时在两个F/y五脉沖后检測到一个间隙,Ot/711信号产生一个羊个脉沖。 Whenever the two F / y five pulses detected a gap, Ot / 711 signal pulses to produce a sheep. 这样,第一个触发器172的g输出作用或门174 Thus, g output action first trigger gate 172 or 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jg输出提供给第四个触发器180作为时钟输入。 The other input, the output of OR gate is provided to a third D flip-flop 178 is input lines, the first flip-flop 172 is inverted jg output is supplied to a fourth flip-flop 180 as a 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g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 a third trigger 178 g output signal and the receiver system clock signal as its clock input. 第五个触发器从它的反向j2输出线产生Ot/Tl信号。 The fifth generation trigger Ot / Tl signal output from its reverse j2 line.

当恰好在一个F/V信号脉冲之后检测到一个GAP信号时CU?2线产生一个信号脉冲。 When just after an F / V GAP signal pulse is detected a signal CU? 2 wire generates a signal pulse. 于是第六个触发器184的D输出线接 So the sixth D flip-flop output line 184 connected

收第四个触发器180的g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19O的反向0输出提供CZJ?2信号。 Close fourth flip-flop output 180 g, and its clock input accepts a system clock signal, the sixth reverse trigger 19O 0 output provides CZJ? 2 signal.

当在两个/^t/及信号之后出现一个GAP仿号时0t/r2信号线产生一个信号脉沖,而C?f/ri线在恰好一个F(?t/及信号之后出现一个CMP信号时产生一个脉沖信号。如图15所示,这可通过把反向的fY^/及信号连到或门186的一个输入端和第二个触发器176的D输入端来提供。第二个触发器176的输出端Q提供给或门186 的另一输入线。或门的输出作为第七个触发器188的/)输入。 When a CMP signal occurs when the emergence of a number of imitation GAP 0t / r2 signal line after two / ^ t / and signal generates a pulse signal, and C? F / ri line in exactly one F (? T / and the signal after time generating a pulse signal. As shown, this can be accomplished by reverse fY ^ / and a signal input connected to the OR gate 186 and the D input terminal of the second flip-flop 176 to provide a 15 second trigger Output Q output terminal 176 is supplied to the other input line or gate 186. OR gate 188 as the seventh flip-flop /) inputs. GA尸信号作为第七个触发器的时钟输入。 GA corpse trigger signal input as the seventh clock. 第七个触发器188的g输出作为第八个触发器190的Z)输入,第11个触发器在它的时钟输入线接收系统时钟信号。 G seventh flip-flop output 188 as an eighth flip-flop 190 Z) input of 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or/r2 信号。 Q output of flip-flop reverse eighth generation 190 or / r2 signal.

CX及1信号由第九个触发器192产生,它的Z)输入接地且时钟输入端接收第二触发器176的反向g输出。 CX 192 and a signal is generated from the ninth flip-flops, its Z) input to ground, and a clock input receiving the output of the second flip-flop 176 is inverted g. 第九个触发器的g输出提供给第十个触发器194的D输入端。 G output of the ninth to the tenth flip-flop flip-flop 194 D inputs. 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g输出包括CZJ?1信号。 Tenth reverse trigger output 194 g including CZJ? 1 signal.

困16團示了如何产生一个SJSZ^CT信号和一个数据准备好( D/?)信号。 16 trapped group shows how to generate a SJSZ ^ CT signal and a data-ready (D /?) Signals. 当一个oi/ri和C?f/r2信号脉沖出现时,数据已准备好可以输出。 When an oi / ri and C? F / r2 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,也即或是一組四个交镨的菱形或是一組五个交镨的菱形。 That is, the servo head is located at one end of the diamond-shaped pattern, i.e., either a set of four diamond-shaped cross-praseodymium or a set of five diamond cross praseodymium. S五ZJ?OM言号用来选 S five ZJ? OM word number is used to choose

摔适当的寄存器和数据准备好脉沖。 Throw the appropriate registers and data ready pulses. SjBi^cr信号从一个/一尺触 SjBi ^ cr signal from a / foot touch

发器196产生,它的/输入端连接到C?C/712信号,K输入端连接到 Transceiver 196 is generated, it is / input connected to the C? C / 712 signal, K input connected to

or/ri信号。 or / ri signal. j一/i:触发器的时钟输入端连接到系统时钟信号。 j a / i: trigger clock input terminal is connected to the system clock signal. 《/— "/ -

ii:触发器196的g输出端产生SEI^CT信号。 ii: the output of the flip-flop 196 g SEI ^ CT signal is generated. Ot/ri和6Jt/r2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(Z)及)信号。 Ot / ri and 6Jt / r2 signal is connected to an input line or a gate 198, or the output of AND gate produces data ready (Z) and) signal.

有关團9所示交镨菱形模式的定位信号的产生可参照下列附困可以更好地理解:困13显示定位信号产生的逻辑电路;困17表示交镨菱形模式和输出信号;图18显示输出信号和清零信号产生 For group 9 post praseodymium diamond pattern generated positioning signal may be attached with reference to the following difficulties may be better understood: Sleepy 13 shows the positioning signal generated by the logic circuit; sleepy 17 represents post praseodymium diamond pattern and output signal; Figure 18 shows the output signal and clear signal

的一张列表。 Of a list. 如图13所示,定位信号包含指定的xot/r和^?J7r 13, the positioning signal contains the specified xot / r and ^? J7r

的交替值。 Alternating values. 如上面提到的,困13表示出由后缀"1"和"2"区分的完整 As mentioned above, the storm 13 expressed by the suffix "1" and "2" to distinguish complete

的冗余信号产生系统,它们轮流产生^c?t/r和yot/r值。 Redundant signal generation systems, which in turn produce ^ c? T / r and yot / r values. 这样,xi 部分产生一个A:of/r值,随后n部分产生一个roc/r值,然后部分产生下一个xoc/r值,F2产生下一个rot/r值,zi部分又产生下一个xc^r值,等等。 Thus, xi section generates an A: of / r value, followed by n section generates a roc / r value, and then generates the next portion xoc / r value, F2 generates the next rot / r value, zi part and generate the next xc ^ r value, and so on. 值的序列枸成定位信号。 Sequence value citrate into positioning signals. 对电路操作的描述最初将仅涉及由后缀〃r'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 〃r 'marked the first redundant signal generation systems.

定位信号由上面参照困4一6和图8,困9所描述的四个a间 Positioning signals from the above reference sleepy 4-6 and 8, the four described a trapped between 9

隔的和除以四个丑间隔的和得到。 Separated and divided by four intervals and get ugly. 困13所示的累加器A:i,x2,:n Accumulator A sleepy Figure 13: i, x2,: n

和可用下法完成这个除法:或将a乘B的例数后再将商数相 Dismount and available to complete this division: the number of cases or a B, and then multiply the quotient phase

加,或先计算和然后执行除法橾作,从而以产生xof/r和n?t/r Plus, or to perform calculations and then divide Shu, and hence, to produce xof / r and n? T / r

值。 Value. a间隔和fi间隔在困17中用困形表示。 fi spacing interval and a 17 trapped by the storm in a graphical representation.

團17表示A间隔A1,A2,A3和在时间上相互重叠,相应的B间隔B1,B2,B3和B4也是这样。 17 shows a group A intervals A1, A2, A3 and 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4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 interval timer 4 and B, 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糸统来替代而求得总和。 As described above, in the preferred embodiment may be used with two parallel signals to generate a pair of the accumulator system which replaced and obtain the sum. 如困13所示,第一个信号生成系统包含两对 13 trapped as the first signal generation system includes two pairs

成对累加器;n和yi,同时第二个信号生成系统包含两对成对累加 Paired accumulator; n and yi, while the second signal generation system includes two paired cumulative

器AT2和r2。 Is AT2 and r2. 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/?OA/ (标记为/iVC及OM)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 /? OA / (labeled / iVC and OM) delta value obtained is applied 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(CU?1或CZJ?2) 分别将累加器的输出重置为零。 Respective signal generation system clear line (CU? 1 or CZJ? 2), respectively, the output of the accumulator is reset to zero. 累加器从增量及OiVf得到它们的递增指令,即每个时钟周期要加的值,增量及OM接着被转换计数器 Accumulators get their increment instruction from an incremental and OiVf, that is, each clock cycle to increase the value of the increment and then converted counter OM

ra和m访问。 ra and m access.

在橾作中,当出现一个czj?i脉沖时,第一个转换计数器rc2 重置为零,并且与它相关联的累加器:n,n和"i也重置为零。如困17所示,随着伺服头在ci及i脉沖后沿伺服模式移动,它越过一个四个伺服模式条的組,然后越过两个五个条的组,转换计数器计数峰值(p幻脉沖以记录已越过了多少伺服模式条。在cl及i信号之后收到第一个尸/s:脉沖时,系统开始为第一个fi间隔计时。在第二个尸k脉沖,开始为第二个5间隔计时,依次类推。在czjji信号 ? In 橾 as in, when there is a czj i pulse, the first conversion rc2 counter is reset to zero, and it is associated with the accumulator: n, n, and "i also reset to zero as the storm 17. is shown, along with the servo head servo mode mobile ci and i pulse after it crossed a four servo pattern of the group, and then crossed the two groups of five bars, conversion counter peak (p pulses to record has crossed the magic How many servo pattern stripe receive the first corpse / s and i signal after cl: pulse, the system starts for the first interval timing fi k corpse in the second pulse, begin timing the interval for the second five. and so on. In czjji signal

之后的第六个尸A"脉冲,开始为第一个A间隔计时。在第七个PK After the sixth corpse A "pulse, start the first A interval timing. In the seventh PK

脉冲,开始为第二个4间隔计时,这样抟续到CX及1信号后的第十 Pulse, begin a second four interval timing, so Tuan continued to CX and a signal after the tenth

一个尸K脉沖,表示越过第十一个伺服模式条,第一个4间隔和第 A corpse K pulse, indicating a servo pattern stripe across the tenth, the first interval and 4

一个5间隔计时结束。 Ending a five-interval timing. 在到CX及1后的第十四个尸x脉沖时,所有 When the CX and fourteenth dead after 1 x pulse, all

的A和B间隔结束并且准备好输出总和。 End of the A and B intervals and ready to output sum. 在一对五条組之后当出现ot/ri脉沖时,第十四伺服模式条产生一个输出值(困15)。 After a group of five when ot / ri pulse occurs, the fourteenth servo pattern stripe generate an output value (sleepy 15).

使用增量/?0M中增量数据的累加器自动地按鶯要加上间隔。 Incremental /? Accumulator 0M in incremental data automatically by the Orioles to add interval. 图18表示存贮在各自增量及0M中的增量数据。 Figure 18 shows stored in each increment and the incremental data 0M. 困18中 18 trapped

列是指示在相关CX/?1或(X及2信号之后哪个伺服模式条刚被越过的转换计数器输出值。:n,X2,... ,Z)2列表示在每个时钟周期将加到图13的各个相应的累加器的增量值。 Column indicates the relevant CX / 1 or (which servo pattern stripe crossed just been converted output value of the counter after X and the second signal:. N, X2, ..., Z)? 2 column indicates at each clock cycle will be added to each respective accumulator of Fig. 13 increment value. 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XI列的增量值根据一个 Such XI column increment value in accordance with a

cx/n信号之后收到的p/s:脉沖数来寻址,而列的增量值根据 received after cx / n signal p / s: the number of pulses is addressed, and the column increment value in accordance with

一个CL/?2信号后收到的脉冲来寻址。 A CL /? Pulses received after the two signals is addressed.

下面将从更多的细节上描述累加器X1的橾作。 The following description will be on the X1 accumulator 橾 more detail. 其它的累加器以同样的方式工作。 Other accumulator in the same manner. 由困17应该很清楚,在一个CL及1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 17 It should be clear by storm, after a CL and a signal crosses the sixth servo pattern stripe started the first of a five diamond A timing interval, which may be the servo pattern stripe, head output analog signal and a second Unit A intervals

查中看出。 Seen in the investigation. 这样,转换计数器rc中由计数尸/i:脉冲产生的输出值等 Thus, the transition counter by counting dead rc / i: pulse generating output values, etc.

于6并且相应增量及03f的地址等于6。 At 6 and the corresponding increment and 03f address equal to 6. 由固18,累加器Z1的增量 By incremental solid 18, the accumulator of Z1

数为一。 Number one.

在cx及1倌号后的第七个尸k脉沖,第一个4间隔继续计时, 同时第二个A间隔开始计时。 In the seventh corpse k cx and pulse a groom numbers after the first four continued timed interval, while the second A interval starts. 因此,在指示越过第七条伺服模式条的第七个脉沖后,及(9AT的地址为七并且由困18很清楚累加器x1 在每个时钟周期递增2。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 。在第九伺服模式条,累加器递增4。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。于是累加器x1的增量减为3,如图18中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。这样,在一个ot/ri脉沖出现之后,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。同样地,累加器n也将完成对b间隔的计时并把数据准备好输出。 Therefore, after the instruction across the servo pattern Article VII of the pulse, and address (9AT of seven and 18 is very clear from the storm x1 accumulator is incremented at each clock cycle 2. In the eighth servo pattern stripe crossed After, three A intervals A1, A2 and A3 simultaneously timed, so the accumulator is incremented each clock cycle 3. In the ninth servo pattern stripe, the accumulator is incremented 4. In the eleventh servo pattern stripe, the first A interval has end, and therefore only three intervals continue to be timed. Then x1 is reduced to increment the accumulator 3, the inlet 18 of the address table shown in Fig. Eleventh, in the fourteenth servo pattern stripe all A interval ends, so increment the accumulator to zero. Thus, after one ot / ri pulse occurs, the accumulator already contains the four A intervals and are ready to generate and output values. Similarly, the accumulator will complete the b n timed intervals and the data ready output.

第二套信号生成糸统的累加器^2和f2以同样的方式工作, 开始于CL及2信号,结末于C?t/r2脉沖的计时(困15)。 Second signal generation system which accumulator and f2 ^ 2 in the same manner, beginning in the late CL and two signals knot in C? T / r2 pulse timing (trapped 15). 这样,在一个CZJ?2信号后越过的第六条伺服模式条对应于一个四菱形組的第一个伺服模式条。 Thus, in a CZJ? After 2 signal across the Article 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組的Al间隔开始并且累加器x2应该递增1。 Thus, for Al interval begins generating a second signal group and the accumulator should be incremented by 1 x2. 这一点由困18表中/?OM地址6所对应的列x2的相应值表示。 This table by storm 18 /? OM Address 6 x2 corresponding column represents the corresponding value. 在带速大约每秒2.0米的情况下,两个累加器的組合以大约18k〃z的頻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 18k〃z provides new position signal data.

困13表示累加器的输出的路径是通过相应的逸择器<formula>formula see original document page 38</formula> 13 shows the path of the storm is the output of the accumulator through the corresponding escape selector <formula> formula see original document page 38 </ formula>

,它们逸择两个信号生成系统 They Yat select two signal generation systems

中哪一个含有应被输出的当前输出值。 In which one of the current output value to be output contains. 由上面困16所描述的S五- Trapped by the above described 16 S five -

L五cr数据信号控制选择。 L cr five data signal control choices. 在一个ot/ri脉沖后,第二套信号生成系统的累加器激活,在一个ot/:T2脉冲后,第一套信号生成系统的累加器激活。 After a ot / ri pulse accumulator second signal generation system activation in a ot /: After T2 pulse accumulator first set of signal generation system activation. 这样,对于困17中所示的交镨菱形模式,第一套累加 Thus, for the cross-praseodymium trapped diamond pattern 17 shown, the first set of cumulative

器xi,yi,Di在一个ot/:T2脉沖后激活,0t/r2脉沖在两个四条组 Is xi, yi, Di in one ot /: T2 pulse after activation, 0t / r2 pulse in two groups of four

之后出现,而第二套累加器X2,172,2)2在一个C?[/711脉沖后激活, 脉沖在两个五条组之后出现。 After emergence, while second accumulator X2,172,2) 2 in a C? After [/ 711 activation pulse, the pulse occurs after two five groups. 在困14所示的最佳实施方式中,执行差镨检查以检測丢失的或多余的转换并检测一个条轻微偏移位置上镨误地读取的伺服模式条。 In the preferred embodiment shown in 14 trapped, praseodymium checks performed to detect the difference or excess loss of conversion and detection of one strip slightly displaced position praseodymium erroneous reading servo pattern stripe. 團14中没有表示在差镨检測之后可执行的差镨校正的细节, 但熟练的技术人员根据上面有关困10—12的描述可以很容易地构 Group 14 is not shown, after detecting the difference praseodymium praseodymium executable difference correction detail, but the skilled artisan based on the above description of the trapped 10-12 can easily be configured

造出这种电路。 Create such a circuit. 在困13中,由计数每个峰值脉沖的转换计数器rci 和rc2检测丢失的或多余的条。 In the sleepy 13, by counting each peak pulse counter conversion rci and rc2 detect missing or extra pieces. 当一个输出信号脉沖ot/ri或ot/r2出现时,幅值比较器检查是否检測到了正确数量的转换(13 When an output signal pulse ot / ri or ot / r2 occurs, magnitude comparators checks if the correct number of conversion (13

或14,如指示)。 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. 如果检測到的数大于预定数,那么由 If the number detected is greater than the predetermined number, then by

s五iJ?cr块产生的数据好(zx;)信号将为假。 s five iJ cr block data generated good? (zx;) signal will be false. 系统译码器36(困2) System decoder 36 (sleepy 2)

检測DG信号并被夸告数据是坏的并采取预定校正措施。 DG boast detection signal and the data is bad report and take corrective action scheduled. 例如在最 For example, in most

佳实施方式中,杖正措施包括保持输出信号为它的先前值。 Best embodiment, the rod being measures include maintaining the output signal to its previous value. 如果来自一个饲服模式条的尸K脉沖在时间上偶尔有点偏移, If the corpse K Servo mode pulse from an occasional bit of the shift in time,

则所有的A间隔值和B间隔值将有不同的值。 Then all A interval values and B interval values will have different values. 困13所示的系统提 Mention the storm system 13 shown

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4和丑间隔。 For the deviation accumulator D1 and D2, it is in a zero result should provide a way to add and subtract 4, and the ugly of each interval. 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Z)^V加a;c和一个最小比较器DEV/mVi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镨, 但不允许偏移大于一个预定的最大值,这个值指示一个差镨。 A maximum comparator Z) ^ V plus a; c and a minimum comparator DEV / mVi check offset accumulator output, allows the servo pattern of the offset is greater than the minimum value of a booking, which allows the normal noise generated within the system praseodymium acceptable difference, but not offset larger than a predetermined maximum value indicates a difference praseodymium. 如果差镨值小于最大值或者小于或等于最小值,则相应偏差累加器2)1 或D2的输出变为高并随着S丑USCT数据信号的输出产生数据好(DG)信号。 If the difference value is less than the maximum praseodymium or less than or equal to the minimum, the corresponding deviation accumulator 2) one or D2 output goes high and with the output data signal S ugly USCT generate data well (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Of/711或CW/r2信号脉冲的模式时防止将随机噪音认为是合法的。 In this way, the deviation check circuitry also prevents random noise generated when adapted to generate a Of / 711 or CW / r2 signal pulse mode 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賴于带速因而对带速的变化不敏慼的伺服控制系统。 This provides a belt speed and thus does not depend on changes in tape speed servo control system insensitive Qi. 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,生成困4一9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 medium, such as magnetic tape, the servo pattern is generated trapped in Figure 4 a 9, will be described below for generating the servo pattern decoder use different systems.

图19给出了一个用于生成上面所描述词服模式的磁鼓系统300。 Figure 19 shows a word serving for generating the above described modes drum system 300. 记录有伺服模式的磁带302缠绕在一个鼓306的曲面304上, Servo pattern is recorded on the magnetic tape 302 wound around a drum 306 surface 304,

以使得弯曲部分与磁带相反一側的一个电磁铁308邻接,电磁铁308产生一个向外的朝向磁带的磁通线。 So that the bent portion of the opposite side of the tape 308 adjacent to an 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的組槽在磁带302上产生一个与图4所示相同的伺 For example, as shown in Figure 20 disposed on the surface of the drum portion 304 of the plurality of grooves produce the same servo one shown in Fig. 4 on the magnetic tape 302

服模式。 Service mode. 熟练的技米人员对于用于产i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Be/vmrrf的美国专利3,869,711。 Skilled technical personnel For m i for producing the servo pattern other details drum system implementation is well known and forms no part of the present invention described herein, for example, can be found Be / vmrrf U.S. Patent No. 3,869,711.

熟练的技术人员可僅得当外部电磁铁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 properly only 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組槽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、铁或玻莫合金材料枸成这些組槽。 The best use of nickel on a non-magnetic drum, iron citrate or permalloy materials into these groups slot.

产生模式的最佳方法是使用一个多间隙词服写头。 The best way to produce more than one mode is to use the service gap word 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. 困21给出了一个根据本发明枸造的多间隙伺服写头400。 21 trapped gives a written according to the present invention is made more citrate gap servo head 400. 困21所示 Figure 21 trapped

的头包含一个带有模式化的孔片区域404的铁氣休环402。 The area contains a hole in the head with a model of the 404 iron off the gas ring 402. 两个铁氣体块406,408构成了磁头外形,它们之间由一个玻璃垫片411分隔。 Two iron gas blocks 406, 408 constitute the head shape, separated by a glass spacer 411 between them.

在构造磁头时,首先采用环氡树脂胶或玻璃粘合技术把铁氡体块406,406和玻璃垫片411结合在一起。 In constructing the head, the first use of plastic or glass ring radon resin bonding technology to radon body iron block 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, In the preferred embodiment,

提供了一个柱形前端表面。 Providing 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.

如困22所示,一个导电的耔晶层416沉积于前端轮廓表面。 As shown in sleepy 22, a conductive layer 416 is deposited on the crystal 耔 the front contour surface. 在最佳实施方式中使用了800埃的M'i^,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爆光或投影曝光完成。 In the preferred embodiment using a M'i ^ 800 angstroms, then the photosensitive resin material is deposited on the front end surface and to form the servo pattern 414 of a desired shape, cylindrical surface of the patterned skilled in the art may be familiar to exposing contact 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2"/w, 高3. 5加。 In the preferred embodiment, the photosensitive resin gap width defined area 2 "/ w, high 3.5 added.

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2"m的M45Fe55材料,然后去除剩余的感光性树脂。然后在前端表面上沉积一层抗磨损的外壳420以保护它。在最佳实施方式,外壳是一个厚度大约为3000埃的MFeiV/FeW夹层结构。也可使用其它的外壳材料,如类金刚石 After the desired gap structures are formed in the photosensitive resin, in addition to the photosensitive resin material 416 coated on the seed layer a layer of approximately M45Fe55 material 2 "m, and then remove the remaining photoresist is then in the front end surface depositing a layer of abrasion-resistant shell 420 to protect it. In the preferred embodiment, the housing is a thickness of about 3000 angstroms MFeiV / FeW sandwich structure can also be used other housing materials, such as diamond-

碳或其它抗磨损材料。 Carbon or other wear resistant material.

最后,如图21所示,一个线围420通过一个线槽422缠绕在铁氡体块408上,这样就完成了头的制作。 Finally, as shown in Figure 21, a line 420 surrounded by a trough 422 is wound on iron radon body block 408, thus completing the first production. 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泉来簡化它的设计。 A novelty of the head 400 is that it uses magnetic saturation current springs to simplify its design. 在困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iV/Fe网格中。 23 trapped write gap in more detail from 414 represented included in a continuous magnetic iV / Fe grid. 常规的理论会认为因为几乎所有的磁通将从低磁阻的JViFe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A^'Fe网格短路了。 Conventional theory considers because almost all of the magnetic flux from the low reluctance JViFe passes not through the high reluctance of the write gap, so that the lead is energized a magnetic field in these gaps should be small, the gaps appear to be A ^ 'Fe grid shorted. 但是,在大电流时iV《T^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 iV "T ^ grid shunt becomes magnetically saturated, so that the magnetic permeability sharply. 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昉止被磁带磨損。 More conventional designs would require wide separation gap in the magnetic flux introduced into the write gap, this high pressure separation gap provided to Fang edge stopper 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 If no outwardly flared end portion, across the write gap of the magnetic field is in

端部减弱。 Ends weakened. 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損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 The skilled artisan will

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。 Recognizing 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, In particular,

可使用一个带有小圆角边缘的平头,把带覆盖于边缘上。 You can use a flat head with a small rounded edges, the band covered on edge. 图24困示了这种技术。 Figure 24 illustrates this technique sleepy. 头900具有一个平面前表面902。 Head 900 having a flat front surface 902. 带904以一个小的巻过头的角度(例如1度)与头接触。 Belt 904 to a small contact angle of Volume too far (e.g., 1 degree) and the head. 使带从头的圓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,带在圓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橫槽可在一定程度上簡化头的制造过程。 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词服模式磁带的过程。 Figure 25 illustrates the use of a pattern recording system 502 to generate a pattern as shown in the above words serve tape process. 糸统502可在如图1所示的带驱动器12中提供。 Moms and 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困9所示模式的磁带的过程并给出了如困21和23所示当带504与写头510相接触通过时的顶视图506和側视困508。 Figure 25 shows in particular the generation of a magnetic tape with a pattern in Figure 9 hardship process and gives as sleepy 21 and 23 when the band write head 504 through 510 in contact with top view and side trapped 508 506. 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 the ordinary - conventional manner, in a conventional manner to switch between the writing head opposite polarity current. 为在带504上产生期望的词服模式,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沖。 To produce the desired word in the tape 504 serving mode, with a predetermined rate while moving the write head 510 receives the periodic current pulses. 写头的周期性电流脉沖在带上产生一个磁通模 Write head to generate a periodic current pulses in a tape mold flux

式,这个模式是头间隙结枸的复制,如困25中带模式514的表示所7?:。 Type, this model is the first copy of the gap junction citrate, as the storm with 25 representing the seven models 514?:. 由圉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的每个电流脉沖记录并且对电流脉沖进行计时以产生图9所示的交错菱形模式,这 It should be clear by yuzhen 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, which

种模式中一个四个交镨菱形的组后跟随着一个五个菱形的组。 Modes in a group of four diamond-shaped cross-Pr group is followed by a five diamond.

困25表示对头写间隙间的空间511进行逸摔以使可在对带的一次扫描中写完交错模式。 25 shows the space sleepy head write gap between 511 and fell so can escape to a swath of finished interlaced mode. 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組交镨菱形组。 Head is repeatedly energized until the recording on the tape strip comprises a set of diamond-shaped cross-praseodymium group. 更具体讲,伺服间隙是如此逸择,使得在带的写速度下,在一个四条組或五条組的最后电流脉冲时,由尾间隙513记录的转换条全部位于在这組的第一个电流脉沖时分别由头间隙515和尾间情:记录的第一条之间。 More specifically, the servo gap is so selected Yi, such 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 515 gap between the head and tail were feeling the pulse: between the first record. 这样,在头适当的四个或五个动作之后就得到了期望的交镨伺服模式。 Thus, after the first four or five appropriate action to obtain the desired cross-praseodymium 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組脉沖所写的全部条都位于被前一組脉沖所写的条之外。 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越过的一組中的 That is, by the trailing gap 513 across a group

所有转换条都位于将在条上写的下一組的任何条之前。 All conversion strips are located on the strip before any article written by the next group.

为了写如困8所示的一个无交镨模式,头的写间隙分隔和脉沖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沖时由头间隙所记录的条之外。 In order to write such a sleepy 8 praseodymium mode without pay, write gap separating the head and pulse taken in a way so that each current pulse recorded by the end of the gap are all located in the front section of the conversion of a current pulse when the head gap Article recorded outside. 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,从而使得位于在一組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組的第一个电流脉沖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.

如困25所示,伺服模式记录系统502的可编程模式生成器516产生提供给脉沖发生器518的脉冲,脉沖发生器518给写头510以周期性激磁。 25 trapped as shown, the servo pattern recording system 502 programmable pattern generator 516 is supplied to the pulse generator 518 generates a pulse, the pulse generator 518 to the write head 510 to 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?示间隙的形状,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 magnetic flux recorded in the servo pattern on the tape 504 stretched write head real? Shape shown gap, belt speed and the pulse width due to the role of the recording to the tape flux pattern is wider than the write head gap.

伺服模式记录系统502可操作于或Z)C可擦除磁带。 Servo pattern recording system 502 can operate in or Z) C erasable tape. 如果磁带504是4C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 is 4C erasable 504, 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》C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 If the tape 504 is a "C 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 magnetic flux patterns with opposite

的极性。 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. From

一个Z)C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。 A Z) C erasable produce with a servo pattern readback signal is approximately twice the signal from the AC erasable tape generated. 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.

困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,可把要求的脉沖模式记录于一个可编程只读存储器(尸/W?M)并通过一个适当的寻址电路循环。 Storm pattern generator 25 can be shown in the skilled personnel familiar to form a variety of techniques, for example, the pulsed mode requires a record to a programmable read-only memory (P / W? M) and through an appropriate The addressing circuit loop. 另外也可用一个合适的计数器和相关逻辑的臬合来产生要求的脉冲模式。 There is also available a suitable counter and associated logic Nie together 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賴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% belt speed accuracy and a 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測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 For example, the available band by rotating a precise

轴编码器505或一个激光多普勒设备完成带速的测量。 505 or a laser Doppler velocity measurement device complete with a shaft encoder. 熟练的技术人员应该很清楚这种带速測量系统的细节。 Skilled in the art should be clear that the details of such a tape velocity measurement system.

在模式脉沖生成后,必须把它们转化为越过写头的电流脉;f 。 After the pulse generation mode, they must be converted to a current pulse across the write head; f. 在最佳实施方式中,脉沖发生器电路产生宽度为150rt5的脉沖,具有高达3安培的峰值电流和一个小于50/w的上升和下降时间。 In the preferred embodiment, the pulse generator circuit generates a pulse width 150rt5 having up to 3 amps of peak current and a rise 50 / w and less than the fall time. Ripe

练的技术人员会知道这样的脉沖发生器可用如一个电源MosF五r 开关和一个限流电阻构成。 Practicing the art would know that such a pulse generator can be used as a power source MosF five r 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.

困26是一个困示了带验证部分的磁带写系统502的原理困并表示在带上记录伺服模式时磁带504经过一个供带巻轴520到达一个收带盘522。 26 is a sleepy sleepy showing a portion of a tape with written verification system 502 and the principle of the storm, said in a servo pattern tape recording tape with Volume 504 through a shaft 520 arrives for a take-up reel 522. 模式生成器516产生模式脉沖,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. 一个词服读头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。 Read head 524 suits a word read the servo pattern and just recorded a pre-amplifier 526 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,如果发现了任何差镨则在带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 difference in the band 504 praseodymium 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. 在祈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 pray tell, certain tracks dedicated servo mode. 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 Using the same

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 One drawback of the servo head and data can not be read by a servo read head with a narrow

于于所有的实际目的。 For all practical purposes. 但是可以得到其它优点,如降低了一个磁头组件中所需的元件数并减小了由于使用分离的词服和数据部所造成 However, other advantages can be obtained, such as reducing the number of elements needed in a head assembly and reduces the use of words and a data portion separated clothes caused by

的偏移差镨。 Offset poor praseodymium. 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,它延展越辻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 Thus, the above is a servo pattern of repeating magnetic flux transitions that extend the width of the Tsuji each servo track such that a servo read head in moving across the translational direction with a servo track width at the same time the head is moved in the shift direction , they can produce a

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。 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. 上面还描迷了适于产生伺服模式的一组不同 Fans described above also adapted to generate a different set of servo patterns

的词服写头,其中包括构達一个多间隙伺服写头的最佳方法。 The word suits write head, which includes a multi-gap structure over the best way to write servo head. 上面还描述了一个词服模式写系统,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 pattern written word service 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,变动或等价組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 ClassificationG11B5/596, A63F7/02, G11B21/10, G11B5/265, G11B5/584, G11B5/58
Cooperative ClassificationG11B5/584
European ClassificationG11B5/584
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