公开(公告)号：US07016134B1

公开(公告)日：2006-03-21

申请号：US10946965

申请日：2004-09-21

申请人： Vinay K. Agarwal ,  Jack M. Chue ,  Robert L. Cloke

发明人： Vinay K. Agarwal ,  Jack M. Chue ,  Robert L. Cloke

IPC分类号： G11B5/09

CPC分类号： G11B5/59633 ,  G11B5/59661

摘要： A method of writing product servo sectors to a disk of a disk drive is disclosed. An external spiral servo writer writes a plurality of spiral tracks to the disk by actuating in a closed loop system a head positioning pin inserted into the disk drive. Each spiral track comprises a high frequency signal interrupted at a predetermined interval by a sync mark. The high frequency signal and sync marks in the spiral tracks are demodulated to maintain synchronization of a servo write clock as well as maintain the head along a circular target path while writing product servo sectors to the disk.

摘要翻译： 公开了一种将产品伺服扇区写入磁盘驱动器的盘的方法。 外部螺旋伺服写入器通过在闭环系统中致动插入盘驱动器中的头定位销来驱动多个螺旋轨道到盘。 每个螺旋轨道包括通过同步标记以预定间隔中断的高频信号。 解调螺旋轨道中的高频信号和同步标记，以保持伺服写入时钟的同步，并且在将产品伺服扇区写入盘时沿着圆形目标路径保持磁头。

公开(公告)号：US06924961B1

公开(公告)日：2005-08-02

申请号：US10232640

申请日：2002-08-30

申请人： Hemant Melkote ,  Robert L. Cloke ,  Vinay K. Agarwal

发明人： Hemant Melkote ,  Robert L. Cloke ,  Vinay K. Agarwal

IPC分类号： G11B5/596

CPC分类号： G11B5/59655

摘要： A method is disclosed for writing servo patterns for tracks on a rotating magnetic disk medium of a disk drive. Servo patterns are written on a reference track of the disk medium. Track following of the written servo patterns on the reference track is performed using a servo loop having a closed-loop response. A position error signal is generated for the reference track based on the track following. A correction signal is generated based on the track following using an observer of a one-dimensional state model that is equivalent to a two-dimensional state model of the servo loop. Servo patterns are written on a target track during track following of the reference track. The position error signal of the servo loop is adjusted based on the correction signal to reduce radial error propagation from the reference track to the target track.

摘要翻译： 公开了一种用于在盘驱动器的旋转磁盘介质上写入用于轨道的伺服模式的方法。 伺服模式写在盘介质的参考轨道上。 使用具有闭环响应的伺服环路来执行跟踪在参考轨道上的写入的伺服模式。 基于跟踪轨迹为参考轨道生成位置误差信号。 基于跟踪使用等同于伺服环路的二维状态模型的一维状态模型的观察者的轨迹生成校正信号。 在跟踪轨道的跟踪期间，伺服模式被写在目标轨道上。 基于校正信号调整伺服环路的位置误差信号，以减小从参考轨道到目标轨道的径向误差传播。

公开(公告)号：US06819518B1

公开(公告)日：2004-11-16

申请号：US10280603

申请日：2002-10-24

申请人： Hemant Melkote ,  Robert L. Cloke ,  Vinay K. Agarwal

发明人： Hemant Melkote ,  Robert L. Cloke ,  Vinay K. Agarwal

IPC分类号： G11B2102

CPC分类号： G11B5/59633

摘要： A method is disclosed for defining tracks on a rotating magnetic disk medium of a disk drive. Reference tracks are followed using a servo control loop while writing servo burst patterns defining a first target servo track. The servo control loop includes a two-dimensional digital state compensator having a first input that receives position error signals, a first output that generates control signals for positioning a transducer head, a second output that generates track-following state variables, and a second input that receives stored track-following state variables. The first target track is followed using the servo control loop while servo burst patterns are written, and while the stored track-following state variables corresponding to the servo burst patterns defining the first target track are applied to the second input.

摘要翻译： 公开了一种用于在盘驱动器的旋转磁盘介质上定义轨道的方法。 在编写定义第一目标伺服轨道的伺服脉冲串模式时，使用伺服控制回路遵循参考轨道。 伺服控制回路包括具有接收位置误差信号的第一输入的二维数字状态补偿器，产生用于定位换能器头的控制信号的第一输出，产生跟踪跟踪状态变量的第二输出和第二输入 它接收存储的跟踪跟踪状态变量。 在伺服脉冲串模式被写入的同时跟踪使用伺服控制回路的第一目标轨迹，并且在将定义了第一目标轨道的伺服脉冲串模式对应的所存储的跟踪跟踪状态变量应用于第二输入。

公开(公告)号：US06999263B1

公开(公告)日：2006-02-14

申请号：US10788767

申请日：2004-02-27

申请人： Hemant Melkote ,  Robert L. Cloke ,  Vinay K. Agarwal

发明人： Hemant Melkote ,  Robert L. Cloke ,  Vinay K. Agarwal

IPC分类号： G11B5/596

CPC分类号： G11B5/59633

摘要： A method is disclosed for defining tracks on a rotating magnetic disk medium of a disk drive. Reference tracks are followed using a servo control loop while writing servo burst patterns defining a first target servo track. The servo control loop includes a two-dimensional digital state compensator having a first input that receives position error signals, a first output that generates control signals for positioning a transducer head, a second output that generates track-following state variables, and a second input that receives processed and stored track-following state variables. The first target track is followed using the servo control loop while servo burst patterns are written, and while the processed and stored track-following state variables corresponding to the servo burst patterns defining the first target track are applied to the second input.

摘要翻译： 公开了一种用于在盘驱动器的旋转磁盘介质上定义轨道的方法。 在编写定义第一目标伺服轨道的伺服脉冲串模式时，使用伺服控制回路遵循参考轨道。 伺服控制回路包括具有接收位置误差信号的第一输入的二维数字状态补偿器，产生用于定位换能器头的控制信号的第一输出，产生跟踪跟踪状态变量的第二输出和第二输入 它接收处理和存储的跟踪跟踪状态变量。 在伺服脉冲串模式被写入的同时跟踪使用伺服控制回路的第一目标轨道，并且与定义第一目标轨道的伺服脉冲串模式对应的处理和存储的跟踪跟踪状态变量被应用于第二输入。

公开(公告)号：US07046472B1

公开(公告)日：2006-05-16

申请号：US10427475

申请日：2003-04-30

申请人： Hemant Melkote ,  Robert L. Cloke ,  Vinay K. Agarwal

发明人： Hemant Melkote ,  Robert L. Cloke ,  Vinay K. Agarwal

IPC分类号： G11B5/596

CPC分类号： G11B5/59655

摘要： A method is disclosed for writing servo patterns for tracks on a rotating magnetic disk medium of a magnetic disk drive. In the method, track following is performed along a reference track, defined by previously written servo burst patterns, using a servo loop having a closed-loop response. A position error signal is generated for the reference track based on the track following. A correction signal is generated based on the track following using an observer of a one-dimensional state model that is equivalent to the two-dimensional state model of the servo loop. Servo patterns are written at a target radial location on the magnetic disk medium during track following of the reference track. The position error signal of the servo loop is adjusted based on the correction signal to reduce radial error propagation from the reference track to the servo burst patterns at the target radial location.

摘要翻译： 公开了一种用于在磁盘驱动器的旋转磁盘介质上写入用于轨道的伺服模式的方法。 在该方法中，使用具有闭环响应的伺服环路，沿着由先前写入的伺服脉冲串模式定义的参考轨道执行跟踪。 基于跟踪轨迹为参考轨道生成位置误差信号。 基于跟踪使用与伺服环路的二维状态模型相当的一维状态模型的观察者的跟踪来生成校正信号。 在跟踪轨道的跟踪期间，在磁盘介质上的目标径向位置处写入伺服模式。 基于校正信号来调整伺服环路的位置误差信号，以减小在目标径向位置处从参考轨迹到伺服脉冲串图形的径向误差传播。

公开(公告)号：US06992848B1

公开(公告)日：2006-01-31

申请号：US10112282

申请日：2002-03-29

申请人： Vinay K. Agarwal ,  Robert L. Cloke

发明人： Vinay K. Agarwal ,  Robert L. Cloke

IPC分类号： G11B21/02

CPC分类号： G11B5/59633

摘要： A method of writing product servo bursts to a disk in a disk drive is disclosed. An external spiral servo writer comprising a head positioning pin and head positioning mechanics periodically writes a plurality of reference servo bursts in a plurality of spiral reference patterns to the disk. The reference servo bursts in the spiral reference patterns are processed to write product servo bursts to the disk. In one embodiment control circuitry within the disk drive processes the reference servo bursts to self-servo write the disk drive, and in another embodiment an external product servo writer processes the reference servo bursts to write the product servo bursts to the disk. In one embodiment, a slope of each spiral reference pattern is selected so that each spiral reference pattern is written over at least twenty revolutions of the disk to increase the accuracy of the head position error generated from the reference servo bursts.

摘要翻译： 公开了将产品伺服脉冲串写入盘驱动器中的盘的方法。 包括头定位销和头定位机构的外部螺旋伺服写入器周期性地将多个参考伺服脉冲串写入多个螺旋参考图案到盘。 处理螺旋参考模式中的参考伺服脉冲串将产品伺服脉冲串写入磁盘。 在一个实施例中，磁盘驱动器内的控制电路处理参考伺服突发以自动伺服写入磁盘驱动器，并且在另一实施例中，外部产品伺服写入器处理参考伺服脉冲以将产品伺服脉冲串写入磁盘。 在一个实施例中，选择每个螺旋参考图案的斜率，使得每个螺旋参考图案被写在盘的至少二十圈上以增加从参考伺服脉冲串产生的磁头位置误差的精度。

公开(公告)号：US4122501A

公开(公告)日：1978-10-24

申请号：US750204

申请日：1976-12-13

申请人： Frank J. Sordello ,  Robert L. Cloke

发明人： Frank J. Sordello ,  Robert L. Cloke

IPC分类号： G11B20/14 ,  G11B20/16 ,  H03K3/02 ,  H03L7/06 ,  H03L7/08 ,  H03L7/14 ,  G11B5/09

CPC分类号： G11B20/16

摘要： A system for detecting data from and recording data on a recording media whereby a single clocking signal generator is utilized for generating the clocking signal both during the recording of data on and the reading of data from the recording media.

摘要翻译： 一种用于在记录介质上检测数据和记录数据的系统，由此在记录数据和从记录介质读取数据期间，单个时钟信号发生器用于产生时钟信号。

公开(公告)号：US06992851B1

公开(公告)日：2006-01-31

申请号：US10882844

申请日：2004-06-30

申请人： Robert L. Cloke

发明人： Robert L. Cloke

IPC分类号： G11B21/02

CPC分类号： G11B5/59633

摘要： A method is disclosed for reducing disk expansion effects while writing spiral reference patterns on a disk. The disk drive comprises control circuitry and a head disk assembly (HDA). In the method, an external spiral servo writer is used to control a radial location of the head for writing a plurality of the spiral reference patterns in an order such that at least two of the spiral reference patterns are not written temporally sequential to an adjacent spiral reference pattern. The head internal to the disk drive is used to read the spiral reference patterns in order to write product servo bursts to the disk, thereby defining a plurality of radially spaced, concentric data tracks.

摘要翻译： 公开了一种在将螺旋参考图案写在磁盘上时减少磁盘扩展效果的方法。 磁盘驱动器包括控制电路和磁头盘组件（HDA）。 在该方法中，使用外部螺旋伺服写入器来控制用于写入多个螺旋参考图案的头部的径向位置，使得至少两个螺旋参考图案在时间上不依次写入相邻螺旋线 参考模式。 磁盘驱动器内部的磁头用于读取螺旋参考模式，以便将产品伺服脉冲串写入磁盘，从而定义多个径向间隔的同心数据磁道。

公开(公告)号：US06989954B1

公开(公告)日：2006-01-24

申请号：US10769480

申请日：2004-01-31

申请人： Tehri S. Lee ,  Robert L. Cloke ,  Siri S. Weerasooriya

发明人： Tehri S. Lee ,  Robert L. Cloke ,  Siri S. Weerasooriya

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59688

摘要： A method of manufacturing a disk drive by demodulating product servo sectors and spiral tracks written on a disk of the disk drive is disclosed. An external spiral servo writer writes a plurality of spiral tracks that spiral from an outer diameter to an inner diameter of the disk. Each spiral track comprises a high frequency signal interrupted at a predetermined interval by a sync mark. The spiral tracks are used to write product servo sectors to the disk during a fill operation. Common circuitry, such as burst demodulation circuitry, is used to demodulate the high frequency signal in the spiral tracks during the fill operation as well as demodulate the product servo sectors.

摘要翻译： 公开了一种通过解调写入磁盘驱动器的磁盘上的产品伺服扇区和螺旋磁道来制造磁盘驱动器的方法。 外部螺旋伺服写入器写入从盘的内径螺旋形的多个螺旋形轨道。 每个螺旋轨道包括通过同步标记以预定间隔中断的高频信号。 螺旋轨道用于在填充操作期间将产品伺服扇区写入磁盘。 诸如脉冲串解调电路之类的公共电路用于在填充操作期间对螺旋磁道中的高频信号进行解调以及解调产品伺服扇区。

公开(公告)号：US4599570A

公开(公告)日：1986-07-08

申请号：US400494

申请日：1982-07-21

申请人： Robert L. Cloke

发明人： Robert L. Cloke

IPC分类号： G01R25/00 ,  H03D13/00 ,  H03L7/089 ,  H03K5/13 ,  H03K5/22

CPC分类号： G01R25/00 ,  H03D13/003 ,  H03L7/089

摘要： A method and apparatus of offset correction which can be applied to control systems, primarily phase-locked-loop systems, and which permits sampling of the error signals for use as an auxiliary input to the system in order to center the error signal around zero.

摘要翻译： 偏移校正的方法和装置，其可以应用于控制系统，主要是锁相环系统，并且允许对误差信号进行采样以用作系统的辅助输入，以便将误差信号置于零附近。