公开(公告)号：US07009805B2

公开(公告)日：2006-03-07

申请号：US10888493

申请日：2004-07-09

申请人： Wai Ee Wong ,  Guoxiao Guo ,  Abdullah Al Mamun ,  Weichun Ye ,  Jingliang Zhang

发明人： Wai Ee Wong ,  Guoxiao Guo ,  Abdullah Al Mamun ,  Weichun Ye ,  Jingliang Zhang

IPC分类号： G11B5/596

CPC分类号： G11B5/59655

摘要： A method for computing position error signal information of a transducer in a data storage system provides for different readback signals between adjacent tracks. The method involves a computation to obtain coarse position information from the servo bursts signals for track seeking and a computation to obtain a position indicator from the user data sector for more precise track following within the user data sector.

摘要翻译： 用于计算数据存储系统中的换能器的位置误差信号信息的方法提供相邻轨道之间的不同回读信号。 该方法涉及一种计算，以从用于跟踪寻找的伺服突发信号中获得粗略位置信息，并进行计算以从用户数据扇区获得位置指示符，以便在用户数据扇区内更精确地跟踪跟踪。

公开(公告)号：US08654467B1

公开(公告)日：2014-02-18

申请号：US13448023

申请日：2012-04-16

申请人： Wai Ee Wong ,  Xiaotian Xu ,  Jinchuan Zheng ,  Guoxiao Guo ,  Jie Yu

发明人： Wai Ee Wong ,  Xiaotian Xu ,  Jinchuan Zheng ,  Guoxiao Guo ,  Jie Yu

IPC分类号： G11B27/36

CPC分类号： G11B20/10472 ,  G11B5/09 ,  G11B5/59622 ,  G11B5/6029 ,  G11B20/10046

摘要： A disk drive is disclosed comprising a disk including a plurality of servo tracks defined by servo sectors, wherein each servo sector comprises a servo preamble. A head is actuated over the disk, wherein the head is operable to generate a read signal. The disk drive further comprises control circuitry including an analog cutoff filter operable to filter the read signal to generate a filtered read signal. The filtered read signal is sampled to generate read samples. During a normal operating mode, the analog cutoff filter is configured to have a first bandwidth. During a measurement mode, the analog cutoff filter is configured to have a second bandwidth greater than the first bandwidth, and the read samples representing at least part of the servo preamble are processed to measure a signal-to-noise ratio (SNR) and/or a fly height of the head.

摘要翻译： 公开了一种磁盘驱动器，其包括包括由伺服扇区定义的多个伺服磁道的磁盘，其中每个伺服扇区包括伺服前导码。 头部被驱动在盘上，其中头部可操作以产生读取信号。 磁盘驱动器还包括控制电路，其包括模拟截止滤波器，其可操作以对读取信号进行滤波以产生经滤波的读取信号。 对经滤波的读取信号进行采样以产生读取样本。 在正常操作模式期间，模拟截止滤波器被配置为具有第一带宽。 在测量模式期间，模拟截止滤波器被配置为具有大于第一带宽的第二带宽，并且处理表示伺服前导码的至少一部分的读取样本以测量信噪比（SNR）和/ 或头部的飞高。

公开(公告)号：US08917469B1

公开(公告)日：2014-12-23

申请号：US13614894

申请日：2012-09-13

申请人： Guoxiao Guo ,  Donald Brunnett ,  Jianguo Zhou ,  Wai Ee Wong

发明人： Guoxiao Guo ,  Donald Brunnett ,  Jianguo Zhou ,  Wai Ee Wong

IPC分类号： G11B5/09

CPC分类号： G11B5/59655 ,  G11B5/59627 ,  G11B5/59644 ,  G11B20/10268 ,  G11B20/1403 ,  G11B20/18 ,  G11B2020/10916

摘要： A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of tracks defined by a plurality of servo sectors. An estimated track ID is generated and a plurality of proximate track IDs is generated having values proximate the estimated track ID. A set of Gray codes is generated each corresponding to the estimated track ID and the proximate track IDs, wherein each Gray code in the set of Gray codes comprises N bits, and M bits out of a high order of the N bits comprise the same value. A recorded Gray code is detected in a first servo sector to generate a detected Gray code, and an error in the detected Gray code is corrected by inverting at least one bit in the detected Gray code comprising a value that is different from the value of the corresponding bit in the M bits.

摘要翻译： 公开了一种磁盘驱动器，包括在包括由多个伺服扇区限定的多个磁道的盘上驱动的磁头。 产生估计的轨道ID，并且生成具有接近估计轨道ID的值的多个邻近轨道ID。 产生一组格雷码，每组格对应于估计的轨道ID和邻近轨道ID，其中格雷码组中的每个格雷码包括N比特，并且N比特的高阶中的M比特包含相同的值 。 在第一伺服扇区中检测到记录的格雷码，以产生检测到的格雷码，并且通过将检测到的格雷码中的至少一个比特反相来校正检测格雷码中的误差，该比特包括不同于 M位中的相应位。