公开(公告)号：US5862005A

公开(公告)日：1999-01-19

申请号：US724977

申请日：1996-10-03

Applicant: Michael D. Leis ,  Ara Patapoutian ,  Mathew P. Vea ,  Richard M. Ehrlich ,  Kevin D. Fisher ,  James A. Henson ,  William R. Akin, Jr.

Inventor： Michael D. Leis ,  Ara Patapoutian ,  Mathew P. Vea ,  Richard M. Ehrlich ,  Kevin D. Fisher ,  James A. Henson ,  William R. Akin, Jr.

IPC: G11B20/14 ,  G11B5/55 ,  G11B5/596 ,  G11B20/10 ,  G11B20/18 ,  G11B21/08 ,  G11B21/10 ,  G11B27/30 ,  H03M13/23 ,  H04L25/49 ,  G11B5/02 ,  G11B5/09

CPC classification number: G11B20/10009 ,  G11B20/1833 ,  G11B21/083 ,  G11B27/3027 ,  G11B5/5526 ,  G11B5/59655 ,  G11B5/59688 ,  H04L25/4904 ,  G11B2220/20 ,  G11B5/59627 ,  G11B5/5965

Abstract: A magnetic disk drive data storage disk defines recording tracks divided into data sectors by narrow servo spokes. A data sector lying between servo spokes is recorded with user data encoded in accordance with a code having a predetermined distance and user data code rate. Each servo spoke of the recording area has at least one servo information field encoded in a wide bi-phase code pattern. The disk drive further includes a synchronous sampling data detection channel having a data transducer head positioned by a servo-controlled actuator over the recording track, a preamplifier for receiving electrical analog signals magnetically induced by the data transducer head from flux transitions present in at least the servo information field, a digital sampler for synchronously sampling the electrical analog signals to produce digital samples, and wide bi-phase decoding circuitry coupled to receive digital samples from the synchronous sampling data detection channel for decoding the wide bi-phase code pattern.

公开(公告)号：US06452990B1

公开(公告)日：2002-09-17

申请号：US09239036

申请日：1999-01-27

Applicant: Michael D. Leis ,  Ara Patapoutian ,  Mathew P. Vea ,  Richard M. Ehrlich ,  Kevin D. Fisher ,  James A. Henson ,  William R. Akin, Jr.

Inventor： Michael D. Leis ,  Ara Patapoutian ,  Mathew P. Vea ,  Richard M. Ehrlich ,  Kevin D. Fisher ,  James A. Henson ,  William R. Akin, Jr.

IPC: H04L702

CPC classification number: G11B20/10009 ,  G11B5/5526 ,  G11B5/59627 ,  G11B5/5965 ,  G11B5/59655 ,  G11B5/59688 ,  G11B20/1833 ,  G11B21/083 ,  G11B27/3027 ,  G11B2220/20 ,  H04L25/4904

Abstract: A magnetic disk drive data storage disk defines recording tracks divided into data sectors by narrow servo spokes. A data sector lying between servo spokes is recorded with user data encoded in accordance with a code having a predetermined distance and user data code rate. Each servo spoke of the recording area has at least one servo information field encoded in a wide bi-phase code pattern. The disk drive further includes a synchronous sampling data detection channel having a data transducer head positioned by a servo-controlled actuator over the recording track, a preamplifier for receiving electrical analog signals magnetically induced by the data transducer head from flux transitions present in at least the servo information field, a digital sampler for synchronously sampling the electrical analog signals to produce digital samples, and wide bi-phase decoding circuitry coupled to receive digital samples from the synchronous sampling data detection channel for decoding the wide bi-phase code pattern.

Abstract translation: 磁盘驱动器数据存储盘通过狭窄的伺服辐条来定义分割成数据扇区的记录轨道。 记录位于伺服轮辐之间的数据扇区，其中用户数据根据具有预定距离的代码和用户数据代码率进行编码。 记录区域的每个伺服轮辐具有编码为宽双相码模式的至少一个伺服信息场。 磁盘驱动器还包括同步采样数据检测通道，其具有由伺服控制致动器在记录轨道上定位的数据传感器头，前置放大器，用于接收由数据传感器头磁场感应的电模拟信号，该电流模拟信号至少存在于 伺服信息字段，用于同步采样电气模拟信号以产生数字样本的数字采样器，以及耦合以从同步采样数据检测通道接收数字样本的宽双相解码电路，用于解码宽双相码模式。

公开(公告)号：US5119043A

公开(公告)日：1992-06-02

申请号：US544506

申请日：1990-06-27

Applicant: Russell W. Borwn ,  Michael D. Leis ,  Elmer C. Simmons

Inventor： Russell W. Borwn ,  Michael D. Leis ,  Elmer C. Simmons

IPC: H03L7/089 ,  H03L7/099 ,  H03L7/187

CPC classification number: H03L7/0805 ,  H03L7/0891 ,  H03L7/099 ,  H03L7/187

Abstract: A multi-band processing system for automatically tuning the oscillator of a phase-locked loop to the frequency and phase of an applied input. The system includes an error detection circuit, a frequency controller, a scaling circuit, and a phase and frequency controller. The applied input and the oscillator output are coupled to the error detection circuit whose error output drives a charge pump/filter circuit. An error signal is derived from the difference between the loop charge pump output V.sub.1 and a preset charge pump zero error reference signal V.sub.ref, wherein the frequency controller regulates the oscillator output frequency according to a frequency error component of V.sub.1 -V.sub.ref, the scaling circuit scales the oscillator output frequency according to a system scaling signal N, and the phase and frequency controller adjusts the oscillator output frequency and phase according to V.sub.1 -V.sub.ref, when a 1/N multiple of the frequency of the oscillator output is compared in the error detection circuit to the frequency of the applied input.

Abstract translation: 一种用于将锁相环的振荡器自动调谐到施加输入的频率和相位的多频带处理系统。 该系统包括错误检测电路，频率控制器，缩放电路以及相位和频率控制器。 施加的输入和振荡器输出耦合到误差检测电路，其误差输出驱动电荷泵/滤波器电路。 根据环路电荷泵输出V1和预设电荷泵零误差参考信号Vref之间的差异导出误差信号，其中频率控制器根据V1-Vref的频率误差分量来调节振荡器输出频率，缩放电路比例 振荡器输出频率根据系统缩放信号N，相位和频率控制器根据V1-Vref调节振荡器输出频率和相位，当在错误检测中比较振荡器输出频率的1 / N倍数 电路到施加输入的频率。

公开(公告)号：US06412088B1

公开(公告)日：2002-06-25

申请号：US09453164

申请日：1999-12-02

Applicant: Ara Patapoutian ,  Michael D. Leis ,  Mathew P. Vea

Inventor： Ara Patapoutian ,  Michael D. Leis ,  Mathew P. Vea

IPC: G11C2900

CPC classification number: G11B20/18 ,  G11B20/1876 ,  G11B2020/183

Abstract: Disclosed is a method and apparatus for increasing the reliability of a disk drive. A block of information is read from a storage medium to provide a first sample, which is stored. The method determines whether an uncorrectable error occurred during the reading, and when the error is determined to have occurred, the block of information is reread from the storage medium to provide an averaged sample, and the average sample is decoded. Further disclosed is a storage unit, which includes a reader for reading a block of information from a storage medium to provide a first sample and for storing said first sample. An error determining mechanism determines whether an uncorrectable error occurred during the reading and issues a command to the reader to re-read the block of information to provide a second sample when the uncorrectable error is determined. A processor receives and averages the first sample and the second sample and produces an averaged sample. A decoder decodes the average sample.

Abstract translation: 公开了一种用于增加磁盘驱动器的可靠性的方法和装置。 从存储介质读取信息块以提供被存储的第一样本。 该方法确定在读取期间是否发生不可纠正的错误，并且当确定发生错误时，从存储介质重新读取信息块以提供平均样本，并且对平均样本进行解码。 进一步公开的是一种存储单元，其包括用于从存储介质读取信息块以提供第一样本并用于存储所述第一样本的读取器。 错误确定机构确定在读取期间是否发生不可校正的错误，并且当确定不可校正的错误时向读者发出命令以重新读取信息块以提供第二样本。 处理器接收并平均第一样品和第二样品并产生平均样品。 解码器解码平均样本。

公开(公告)号：US4380723A

公开(公告)日：1983-04-19

申请号：US046130

申请日：1979-06-05

Applicant: Michael D. Leis ,  Robert C. Rose

Inventor： Michael D. Leis ,  Robert C. Rose

IPC: H02P29/00 ,  G01P3/489 ,  H02P7/29 ,  H02P5/16

CPC classification number: G01P3/489 ,  H02P7/2913 ,  Y10S388/902 ,  Y10S388/922

Abstract: A servo circuit for electronically controlling the operation of an electric motor is disclosed. The rotational frequency of the motor is converted into a varying frequency waveform by a tachometer. The tachometer output is applied to a conversion circuit which includes a peak detector that converts the output waveform of the tachometer into a square-wave signal. The square-wave signal is, in turn, connected to one input of an exclusive-OR gate. The peak detector square-wave signal is also applied to a shift register which, after a time delay, applies the same signal to another input of the exclusive-OR gate. With these connections, the exclusive-OR gate produces a square-wave output whose duty cycle is proportional to the speed of the DC motor. This output can then be either amplified and applied directly to the electric motor to drive it, or integrated and applied to an amplifier to drive the motor in accordance with standard servo techniques.

Abstract translation: 公开了用于电子控制电动机的操作的伺服电路。 电机的转速通过转速计转换成变化的频率波形。 转速计输出应用于转换电路，转换电路包括将转速表的输出波形转换为方波信号的峰值检测器。 方波信号又连接到异或门的一个输入。 峰值检测器方波信号也被施加到移位寄存器，该移位寄存器在时间延迟之后将相同的信号施加到异或门的另一个输入。 通过这些连接，异或门产生方波输出，其占空比与直流电机的速度成比例。 然后可以将该输出放大并直接施加到电动机以驱动它，或者将其整合并施加到放大器以根据标准伺服技术驱动电动机。

公开(公告)号：US07742257B2

公开(公告)日：2010-06-22

申请号：US11624420

申请日：2007-01-18

Applicant: Edward G. Acciardi ,  A. David Michael ,  Jonathan S. Haynes ,  Kimberly C. Mann ,  Michael D. Leis

Inventor： Edward G. Acciardi ,  A. David Michael ,  Jonathan S. Haynes ,  Kimberly C. Mann ,  Michael D. Leis

IPC: G11B33/08 ,  G11B33/12

CPC classification number: G11B33/08 ,  G11B25/043

Abstract: A acoustic damping pad is provided. The acoustic damping pad includes a first surface and an opposing second surface that are defined by a periphery. A first set of perforations extend between the first surface and the second surface of the acoustic damping pad. Each adjacent perforation in the first set of perforations is uniformly spaced apart from each other across a first select surface area of the first surface and across a corresponding first select surface area of the opposing second surface to form a uniform pattern.

Abstract translation: 提供声阻尼垫。 声阻尼垫包括由周边限定的第一表面和相对的第二表面。 第一组穿孔在声阻尼垫的第一表面和第二表面之间延伸。 第一组穿孔中的每个相邻的穿孔在第一表面的第一选择表面区域和第二选择表面区域相互间隔彼此均匀地间隔开并且相对的第二表面的相应的第一选择表面区域形成均匀的图案。

公开(公告)号：US20070242388A1

公开(公告)日：2007-10-18

申请号：US11733894

申请日：2007-04-11

Applicant: Bulent Goksel ,  Michael D. Leis

Inventor： Bulent Goksel ,  Michael D. Leis

IPC: G11B17/02

CPC classification number: G11B17/038 ,  G11B17/0287

Abstract: A disc clamp is provided for securing discs to a spindle motor. In particular, the clamp is useful in providing distributed forces to the discs. The clamp includes an annular body having an upper surface, a lower surface, an inner circumference and an outer circumference. A flange extends from the lower surface of the annular body and has an inner surface oriented towards the inner circumference of the annular body. A plurality of apertures are formed between the upper and lower surfaces of the annular body and are configured to receive fasteners. Further, a plurality of force distributing features are formed in the flange between the outer surface of the flange and the inner surface of the flange.

Abstract translation: 提供了用于将盘固定到主轴电机的盘夹。 特别地，夹具可用于向盘提供分布的力。 夹具包括具有上表面，下表面，内圆周和外圆周的环形体。 凸缘从环形体的下表面延伸并且具有朝向环形体的内圆周的内表面。 在环形体的上表面和下表面之间形成多个孔，并且构造成容纳紧固件。 此外，在凸缘的外表面和凸缘的内表面之间的凸缘中形成多个力分布特征。

公开(公告)号：US5036408A

公开(公告)日：1991-07-30

申请号：US193090

申请日：1988-05-12

Applicant: Michael D. Leis ,  Bruce Leshay ,  Michael Muchnik ,  Satish Rege ,  Charles M. Riggle ,  Lih-Jyh Weng

Inventor： Michael D. Leis ,  Bruce Leshay ,  Michael Muchnik ,  Satish Rege ,  Charles M. Riggle ,  Lih-Jyh Weng

IPC: G11B20/10 ,  G11B5/596 ,  G11B20/12 ,  G11B20/14 ,  G11B27/30

CPC classification number: G11B27/3027 ,  G11B20/1217 ,  G11B5/59633 ,  G11B2020/1282 ,  G11B2220/20

Abstract: A disk drive system provides all required synchronization, positioning, validation, and data functions within each disk sector. All of these functions are provided within two zones, a header section and a data section. The header section includes a preamble, a synchronization character and an address field, as well as servo information for track following. The data section of each sector includes a data preamble, a data synchronization character, a bad sector bit map, the data and data redundancy information. The header section of at least one sector in a track includes a short DC-erase field, a transitionless segment which is used in synchronization. To synchronize a read/write head to the disk, the system first detects the DC-erase field. The system next searches for the header premable and synchronization character. If it finds them within predetermined times, it then looks for a valid sector address to complete the synchronization. If the system does not detect the preamble and synchronization character within the predetermined times, it looks for another DC-erase field and continues the synchronization process. After the preamble and synchronization character are found, the desired sector is located by reading the addresses of the succeeding sectors.

公开(公告)号：US4928075A

公开(公告)日：1990-05-22

申请号：US371494

申请日：1989-06-26

Applicant: Michael D. Leis

Inventor： Michael D. Leis

IPC: H03L7/107

CPC classification number: H03L7/107

Abstract: A method and apparatus for combining a plurality of different filtering paths of varying bandwidth to provide selectable bandwidth signal filtering without transients caused by initialization of filter components. The signal to be filtered is applied to a plurality of parallel connected passband filters ranging from a widest passband filter to a narrowest passband filter. The bandwidth of the parallel filter combination is progressively narrowed by sequentially holding the output level of each of the filters in declining order of their passband frequency range, beginning with the widest passband filter, until all of the output levels of the filters are held constant except for the narrowest passband filter. This filter system is especially adapted for use as a loop filter in a phase locked loop control system incorporated in a data storage disc drive.

Abstract translation: 一种用于组合多个不同带宽的不同滤波路径的方法和装置，以提供可选择的带宽信号滤波，而不会由滤波器组件的初始化引起瞬变。 要滤波的信号被施加到从最宽通带滤波器到最窄通带滤波器的多个并联连接的通带滤波器。 并行滤波器组合的带宽通过依次保持每个滤波器的输出电平以通带频率范围的下降顺序逐渐变窄，从最宽通带滤波器开始，直到滤波器的所有输出电平保持不变，除了 用于最窄的通带滤波器。 该滤波器系统特别适用于并入数据存储盘驱动器中的锁相环控制系统中的环路滤波器。

公开(公告)号：US20070165328A1

公开(公告)日：2007-07-19

申请号：US11624420

申请日：2007-01-18

Applicant: Edward G. Acciardi ,  A. David Michael ,  Jonathan S. Haynes ,  Kimberly C. Mann ,  Michael D. Leis

Inventor： Edward G. Acciardi ,  A. David Michael ,  Jonathan S. Haynes ,  Kimberly C. Mann ,  Michael D. Leis

IPC: G11B5/235

CPC classification number: G11B33/08 ,  G11B25/043

Abstract: A acoustic damping pad is provided. The acoustic damping pad includes a first surface and an opposing second surface that are defined by a periphery. A first set of perforations extend between the first surface and the second surface of the acoustic damping pad. Each adjacent perforation in the first set of perforations is uniformly spaced apart from each other across a first select surface area of the first surface and across a corresponding first select surface area of the opposing second surface to form a uniform pattern.

Abstract translation: 提供声阻尼垫。 声阻尼垫包括由周边限定的第一表面和相对的第二表面。 第一组穿孔在声阻尼垫的第一表面和第二表面之间延伸。 第一组穿孔中的每个相邻的穿孔在第一表面的第一选择表面区域和第二选择表面区域相互间隔彼此均匀地间隔开并且相对的第二表面的相应的第一选择表面区域形成均匀的图案。