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1. 发明授权

US4122501A System for recording and reading back data on a recording media 失效
标题翻译：用于在记录介质上记录和读回数据的系统
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。

2. 发明授权

US4003000A Sinusoidal oscillator with electronically variable frequency 失效
标题翻译：具有电子变频的正弦振荡器
公开(公告)号：US4003000A
公开(公告)日：1977-01-11
申请号：US581091
申请日：1975-05-27
申请人： Frank J. Sordello , Robert L. Cloke
发明人： Frank J. Sordello , Robert L. Cloke
IPC分类号： H03B1/00 , H03B5/12 , H03B5/24 , H03B3/04
CPC分类号： H03B5/24 , H03B5/1203 , H03B5/1231 , H03B5/124 , H03B2200/0068 , H03B2201/02
摘要： A sinusoidal oscillator including means for electronically varying the frequency of oscillation by altering the phase angle of the amplifier circuit phase shift.
摘要翻译：一种正弦振荡器，包括用于通过改变放大器电路相移的相位角电子地改变振荡频率的装置。

3. 发明授权

US06924961B1 Method and apparatus for self servowriting of tracks of a disk drive using an observer based on an equivalent one-dimensional state model 失效
标题翻译：使用基于等效一维状态模型的观察者自动伺服磁盘驱动器的磁道的方法和装置
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。

4. 发明授权

US06819518B1 Method and apparatus for self servowriting of tracks of a disk drive using a servo control loop having a two-dimensional digital state compensator 失效
标题翻译：使用具有二维数字状态补偿器的伺服控制回路自动伺服磁盘驱动器的磁道的方法和装置
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。

5. 发明授权

US06992851B1 Method for nonsequentially writing reference spiral servo patterns to a disk to compensate for disk expansion 失效
标题翻译：将参考螺旋伺服模式顺序地写入磁盘以补偿磁盘扩展的方法
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。

6. 发明授权

US06989954B1 Demodulating servo sectors and spiral tracks using common circuitry 失效
标题翻译：使用公共电路解调伺服扇区和螺旋轨道
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。

7. 发明授权

US4599570A Phase detector with independent offset correction 失效
标题翻译：相位检测器，具有独立的偏移校正
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。

8. 发明授权

US4506236A Composite filter/differentiator 失效
标题翻译：复合滤波器/微分器
公开(公告)号：US4506236A
公开(公告)日：1985-03-19
申请号：US449883
申请日：1982-12-15
申请人： Robert L. Cloke
发明人： Robert L. Cloke
IPC分类号： H03H7/01 , H03H7/48 , H03H17/00 , H03K9/04
CPC分类号： H03H7/0115 , H03H7/48
摘要： There is shown and described a relatively simple electronic circuit using few discrete components which is used to replace the filter and delay line differentiator in existing circuits. The new circuit provides a simultaneous output of even and odd signals which have the same transfer function except for the derivative operation. The circuit is especially useful in read and write channels of a disk drive apparatus.
摘要翻译：示出并描述了使用很少的分立元件的相对简单的电子电路，其用于替代现有电路中的滤波器和延迟线微分器。新电路提供除了导数运算之外具有相同传输功能的偶数和奇数信号的同时输出。该电路在磁盘驱动装置的读和写通道中特别有用。

9. 发明授权

US07068459B1 Adjusting track density by changing PES algorithm when servo writing a disk drive from spiral tracks 失效
标题翻译：当伺服从螺旋轨道写入磁盘驱动器时，通过改变PES算法来调整轨道密度
公开(公告)号：US07068459B1
公开(公告)日：2006-06-27
申请号：US10946462
申请日：2004-09-20
申请人： Robert L. Cloke , Siri S. Weerasooriya , Tehri S. Lee , Edgar D. Sheh , Wing Ying
发明人： Robert L. Cloke , Siri S. Weerasooriya , Tehri S. Lee , Edgar D. Sheh , Wing Ying
IPC分类号： G11B21/02 , G11B5/09 , G11B5/596
CPC分类号： G11B5/59633 , G11B5/59638 , G11B5/59661
摘要： A method and apparatus is disclosed for writing product servo sectors to a disk of a disk drive to define a plurality of data tracks. The disk drive comprises the disk and a head actuated over the disk. The disk comprises a plurality of spiral tracks which are read using the head to synchronize a write clock and to generate a position error signal (PES) according to a PES algorithm used to maintain the head along a first servo track while writing product servo sectors along the first servo track. The PES algorithm is adjusted to seek the head to a second servo track, and the head is used to write product servo sectors along the second servo track.
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以定义多个数据轨道的方法和装置。磁盘驱动器包括磁盘和在盘上启动的磁头。磁盘包括多个螺旋磁道，它们使用磁头读取以同步写时钟，并根据用于沿着第一伺服磁道保持磁头的PES算法产生位置误差信号（PES），同时沿着第一个伺服轨道。调整PES算法以寻找头到第二伺服轨道，并且头用于沿着第二伺服轨道写入乘积伺服扇区。

10. 发明授权

US07016134B1 Using an external spiral servo writer to write spiral tracks to a disk to facilitate writing product servo sectors to the disk 失效
标题翻译：使用外部螺旋伺服写入器将螺旋轨迹写入磁盘，以便于将产品伺服扇区写入磁盘
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。

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