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1. 发明授权

US06882487B2 Compensation for timing variation in disc drives employing servo tracking systems 失效
标题翻译：使用伺服跟踪系统的磁盘驱动器的定时变化补偿
公开(公告)号：US06882487B2
公开(公告)日：2005-04-19
申请号：US10183680
申请日：2002-06-27
申请人： Reed D. Hanson , Timothy F. Ellis , Dustin M. Cvancara , Nathaniel B. Wilson
发明人： Reed D. Hanson , Timothy F. Ellis , Dustin M. Cvancara , Nathaniel B. Wilson
IPC分类号： G11B5/55 , G11B5/596 , G11B27/30 , G11B19/247
CPC分类号： G11B5/5534 , G11B5/59627
摘要： An apparatus and method for compensating for variation in sample rate in a disc drive having a rotating disc and a head that is positioned over the rotating disc is provided. The disc includes at least one track that has multiple consecutive sectors. A sample rate value between timing marks of each pair of consecutive sectors of the multiple consecutive sectors is computed to obtain a sequence of sample rate values. A sequence of timing error values is computed as a function of the sequence of sample rate values and a nominal sample rate value. Data related to the sequence of timing error values is utilized to compensate for variation in sample rate values.
摘要翻译：提供了一种用于补偿具有旋转盘和位于旋转盘上的头的盘驱动器中的采样率变化的装置和方法。盘包括具有多个连续扇区的至少一个轨道。计算多个连续扇区的每对连续扇区的定时标记之间的采样率值，以获得采样率值序列。根据采样率值和标称采样率值的顺序计算定时误差值序列。利用与定时误差值序列有关的数据来补偿采样率值的变化。

2. 发明授权

US07119981B2 Method and apparatus for tracking radially-dependent repeatable run-out 有权
公开(公告)号：US07119981B2
公开(公告)日：2006-10-10
申请号：US10184702
申请日：2002-06-28
申请人： Reed D. Hanson , Nathaniel B. Wilson , John C. Morris , Timothy F. Ellis
发明人： Reed D. Hanson , Nathaniel B. Wilson , John C. Morris , Timothy F. Ellis
IPC分类号： G11B5/596 , G11B5/55
CPC分类号： G11B5/5534 , G11B5/59627
摘要： An apparatus and method for tracking radially-dependent repeatable run-out in a disc drive having a servo loop for positioning a head over a rotating disc is provided. The disc includes multiple tracks. Radially-dependent repeatable run-out control components for at least a subset of the multiple tracks are first determined. Data representative of the radially-dependent repeatable run-out control components for the subset of the multiple tracks is then stored. The stored data representative of the radially-dependent repeatable run-out control components is retrieved before settling on the target track, and subsequently used to follow the selected track.

3. 发明授权

US07589930B2 Zone based repeated runout error compensation 有权
标题翻译：基于区域的重复跳动误差补偿
公开(公告)号：US07589930B2
公开(公告)日：2009-09-15
申请号：US11724124
申请日：2007-03-14
申请人： Reed D. Hanson , Thomas C. Zirps , Peng Yan , Samir Mittal , Timothy F. Ellis
发明人： Reed D. Hanson , Thomas C. Zirps , Peng Yan , Samir Mittal , Timothy F. Ellis
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： Compensation for repeated runout (RRO) error, such as in a data storage device servo circuit, is preferably carried out by obtaining a population distribution of RRO error values from at least selected ones of a subset of tracks. An RRO error compensation value is determined for each one of the subset of tracks when a variance characteristic of said population distribution meets a selected criterion. Preferably, a first track of a storage medium has a servo field at a first angular position on the medium, a repeated runout (RRO) error compensation field at a second angular position on the medium, and a user data field at a third angular position on the medium. An immediately adjacent second track preferably has a servo field at the first angular position and a user data field at the second angular position in lieu of an RRO error compensation field.
摘要翻译：针对重复跳动（RRO）错误的补偿，例如在数据存储设备伺服电路中，优选地通过从轨道子集中的至少选定的RRO误差值获得RRO误差值的总体分布来执行。当所述人口分布的方差特征满足所选择的标准时，对于轨道子集中的每一个确定RRO误差补偿值。优选地，存储介质的第一轨道在介质上的第一角度位置处具有伺服磁场，在介质上的第二角位置处的重复跳动（RRO）误差补偿场，以及在第三角位置处的用户数据场在媒体上最近相邻的第二轨道优选地具有位于第一角位置处的伺服场，而在第二角位置具有用户数据场，而不是RRO误差补偿场。

4. 发明申请

US20080225654A1 Zone based repeated runout error compensation 有权
标题翻译：基于区域的重复跳动误差补偿
公开(公告)号：US20080225654A1
公开(公告)日：2008-09-18
申请号：US11724124
申请日：2007-03-14
申请人： Reed D. Hanson , Thomas C. Zirps , Peng Yan , Samir Mittal , Timothy F. Ellis
发明人： Reed D. Hanson , Thomas C. Zirps , Peng Yan , Samir Mittal , Timothy F. Ellis
IPC分类号： G11B7/00
CPC分类号： G11B5/59627
摘要： Compensation for repeated runout (RRO) error, such as in a data storage device servo circuit, is preferably carried out by obtaining a population distribution of RRO error values from at least selected ones of a subset of tracks. An RRO error compensation value is determined for each one of the subset of tracks when a variance characteristic of said population distribution meets a selected criterion. Preferably, a first track of a storage medium has a servo field at a first angular position on the medium, a repeated runout (RRO) error compensation field at a second angular position on the medium, and a user data field at a third angular position on the medium. An immediately adjacent second track preferably has a servo field at the first angular position and a user data field at the second angular position in lieu of an RRO error compensation field.
摘要翻译：针对重复跳动（RRO）错误的补偿，例如在数据存储设备伺服电路中，优选地通过从轨道子集中的至少选定的RRO误差值获得RRO误差值的总体分布来执行。当所述人口分布的方差特征满足所选择的标准时，对于轨道子集中的每一个确定RRO误差补偿值。优选地，存储介质的第一轨道在介质上的第一角度位置处具有伺服磁场，在介质上的第二角位置处的重复跳动（RRO）误差补偿场，以及在第三角位置处的用户数据场在媒体上最近相邻的第二轨道优选地具有位于第一角位置处的伺服场，而在第二角位置具有用户数据场，而不是RRO误差补偿场。

5. 发明授权

US06426845B1 Asynchronous analog demodulator and method for a null-type servo pattern 有权
标题翻译：异步模拟解调器和零型伺服模式的方法
公开(公告)号：US06426845B1
公开(公告)日：2002-07-30
申请号：US09268012
申请日：1999-03-15
申请人： Alexei H. Sacks , Timothy F. Ellis
发明人： Alexei H. Sacks , Timothy F. Ellis
IPC分类号： G11B5596
CPC分类号： G11B21/081 , G11B5/5552 , G11B5/59655
摘要： An asynchronous demodulator and method is provided which determines a position error of a read head relative to a position on a medium in a storage device. The read head generates a-read signal as the read head passes over a servo area on the medium. The demodulator generates a normal demodulating signal that is asynchronous with the read signal and a quadrature demodulating signal that is ninety degrees out of phase with the normal demodulating signal. The read signal is multiplied by the normal demodulating signal and the quadrature demodulating signal to produce a normal position signal and a quadrature position signal. The demodulator produces a position error magnitude and a position error direction based on the normal position signal and the quadrature position signal.
摘要翻译：提供一种异步解调器和方法，其确定读取头相对于存储设备中介质上的位置的位置误差。读头在读取头通过介质上的伺服区域时产生读取信号。解调器产生与读取信号异步的正常解调信号和与正常解调信号相差90度的正交解调信号。读取信号乘以正常解调信号和正交解调信号，以产生正常位置信号和正交位置信号。解调器基于正常位置信号和正交位置信号产生位置误差幅度和位置误差方向。

6. 发明授权

US06392834B1 Concentric spacing of virtual data tracks using run-out compensation 有权
标题翻译：使用跳动补偿的虚拟数据轨道的同心间距
公开(公告)号：US06392834B1
公开(公告)日：2002-05-21
申请号：US09394756
申请日：1999-09-13
申请人： Timothy F. Ellis
发明人： Timothy F. Ellis
IPC分类号： G11B5596
CPC分类号： G11B21/106 , G11B5/59627
摘要： Disclosed are a method and apparatus for compensating for written-in repeatable run-out in a disc drive. A written-in repeatable run-out compensation value is stored in a servo field residing on a track. The compensation value is subtracted from a corresponding servo value to obtain a compensated servo value. The head is positioned relative to the track based upon the compensated servo value. Also disclosed is a method for determining the written-in repeatable run-out compensation values wherein the head is positioned over the intended center of the track so that the head follows an essentially circular path relative to the disc surface. For each revolution of the disc, a servo value indicating the position of the head relative to the track at the servo field is determined. The servo values are averaged over a number of revolutions in order to extract a non-repeatable portion of the run-out.
摘要翻译：公开了用于补偿盘驱动器中的可写入可重复耗尽的方法和装置。写入可重复的耗尽补偿值存储在驻留在轨道上的伺服字段中。从相应的伺服值中减去补偿值，以获得补偿的伺服值。基于补偿的伺服值，头部相对于轨道定位。还公开了一种用于确定可写入的可重复耗尽补偿值的方法，其中头部位于轨道的预期中心上方，使得头部相对于盘表面遵循基本圆形的路径。对于盘的每次旋转，确定指示磁头相对于伺服磁场的磁道的位置的伺服值。伺服值在多次转数之间进行平均，以便提取出不可重复的部分。

7. 发明授权

US06249392B1 Head instability detection method and apparatus 失效
标题翻译：头不稳定检测方法及装置
公开(公告)号：US06249392B1
公开(公告)日：2001-06-19
申请号：US09078179
申请日：1998-05-13
申请人： Alexei H. Sacks , Timothy F. Ellis
发明人： Alexei H. Sacks , Timothy F. Ellis
IPC分类号： G11B2736
CPC分类号： G11B20/10203 , G11B5/5534 , G11B5/59611 , G11B5/59688 , G11B19/04 , G11B27/36 , G11B2005/0013 , G11B2005/0016
摘要： A method and apparatus detects pulse asymmetries in a read signal of a data storage device. The read signal is rectified through multiplication with a rectification signal to produce a product signal. The product signal is integrated to produce integrands indicative of pulse asymmetry. In some embodiments of the present invention, the integrands are compared against a baseline value to determine a performance characteristic of a read head in the data storage device.
摘要翻译：一种方法和装置检测数据存储装置的读取信号中的脉冲不对称性。读取信号通过与整流信号相乘来整流以产生乘积信号。产品信号被集成以产生指示脉冲不对称的被占据。在本发明的一些实施例中，将被积函数与基线值进行比较以确定数据存储设备中的读头的性能特性。

8. 发明授权

US06195220B1 Method and apparatus utilizing field ratioing demodulation techniques for a null-type servo pattern 有权
标题翻译：利用空比型伺服模式的场比解调技术的方法和装置
公开(公告)号：US06195220B1
公开(公告)日：2001-02-27
申请号：US09268118
申请日：1999-03-15
申请人： Timothy F. Ellis , Alexei H. Sacks
发明人： Timothy F. Ellis , Alexei H. Sacks
IPC分类号： G11B5596
CPC分类号： G11B21/081 , G11B5/5552 , G11B5/59655
摘要： A method of generating a position error estimate generates a phase field signal and a position error field signal. A set of operations is performed on the phase field signal and the same set of operations is performed on the position error field signal. The result obtained by performing the set of operations on the position error field signal is divided by the results obtained by performing the set of operations on the phase field signal. The result of the division is the position error estimate. In addition, a demodulation circuit is provided that utilizes field ratioing.
摘要翻译：产生位置误差估计的方法产生相位场信号和位置误差场信号。对相位场信号执行一组操作，并对位置误差场信号执行相同的一组操作。通过对位置误差场信号执行一组操作而获得的结果除以通过对相位场信号执行一组操作获得的结果。除法的结果是位置误差估计。此外，提供利用场比的解调电路。

9. 发明授权

US06181505B2 Synchronous digital demodulator with integrated read and servo channels 有权
标题翻译：具有集成读和伺服通道的同步数字解调器
公开(公告)号：US06181505B2
公开(公告)日：2001-01-30
申请号：US09268009
申请日：1999-03-15
申请人： Alexei H. Sacks , Timothy F. Ellis
发明人： Alexei H. Sacks , Timothy F. Ellis
IPC分类号： G11B5596
CPC分类号： G11B20/10009 , G11B5/59605 , G11B5/59688 , G11B21/083 , G11B21/10 , G11B2020/10888
摘要： A synchronous digital demodulator and method for demodulating a read signal including a user data waveform and a servo waveform which are generated by a read head as the read head passes over a user data area and a servo area, respectively, on a medium in a storage device. The user data waveform is converted to a series of digital user data values at a user data sample rate. The series of digital user data values are then applied to a user data detector circuit. The servo waveform is converted to a series of digital servo values at a servo sample rate, which is independent from the user data sample rate. The series of digital servo values are demodulated synchronously with the servo waveform to produce a position error value indicative of a position error of the read head relative to a location on the medium.
摘要翻译：一种用于解调包括用户数据波形和伺服波形的读取信号的同步数字解调器和方法，读取头分别在存储器中的介质上经过用户数据区域和伺服区域，由读取头产生设备。以用户数据采样率将用户数据波形转换成一系列数字用户数据值。然后将一系列数字用户数据值应用于用户数据检测器电路。伺服波形以伺服采样率转换为一系列数字伺服值，与用户数据采样率无关。一系列数字伺服值与伺服波形同步解调，产生一个位置误差值，该位置误差值表示读取头相对于介质上位置的位置误差。

10. 发明授权

US06510015B2 Magnetic disc having physical servo patterns with a magnetic carrier, and method of making and using the same 失效
标题翻译：具有带磁性载体的物理伺服图案的磁盘及其制造和使用方法
公开(公告)号：US06510015B2
公开(公告)日：2003-01-21
申请号：US09726786
申请日：2000-11-30
申请人： Alexei H. Sacks , Timothy F. Ellis , Patrick J. Korkowski , Karl A. Belser
发明人： Alexei H. Sacks , Timothy F. Ellis , Patrick J. Korkowski , Karl A. Belser
IPC分类号： G11B2102
CPC分类号： B82Y10/00 , G11B5/59633 , G11B5/59655 , G11B5/74 , G11B5/743 , G11B5/82 , G11B21/025
摘要： A magnetic medium comprises a magnetic disc having a read surface that has a plurality of tracks, at least some having servo sectors. The servo sectors comprise a plurality of magnetic irregularities, such as pits or regions of reduced magnetic coercivity, arranged in a servo pattern along the servo sector at a servo frequency. A magnetic pattern is recorded in the disc along the servo sector at a high carrier frequency. A process for manufacturing the servo pattern and for recovering servo data from the servo pattern are also described.
摘要翻译：磁介质包括具有读表面的磁盘，该磁盘具有多个轨道，至少一些具有伺服扇区。伺服扇区包括以伺服频率沿着伺服扇区布置在伺服模式中的多个磁性不规则性，例如凹陷或减小的磁矫顽力的区域。沿着伺服扇区以高载波频率在磁盘中记录磁图案。还描述了用于制造伺服模式并用于从伺服模式恢复伺服数据的处理。

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