公开(公告)号：US09246519B2

公开(公告)日：2016-01-26

申请号：US13672218

申请日：2012-11-08

Applicant: LSI Corporation

Inventor： Jefferson E. Singleton ,  Shaohua Yang ,  Bruce A. Wilson ,  Keenan T. O'Brien

IPC: G06F11/263 ,  H03M13/00 ,  H03M13/11 ,  H03M13/35

CPC classification number: H03M13/6356 ,  H03M13/11 ,  H03M13/35 ,  H03M13/63 ,  H03M13/6343

Abstract: A method for producing a LDPC encoded test pattern for media in a LDPC based drive system includes adding error detection code data to a predominantly zero bit test pattern and adding additional zero bits to produce a test pattern of a desirable length. The test pattern may then be scrambled to produce a desirable flaw detection test pattern. The flaw detection test pattern may then be encoding with an LDPC code, or other error correction code with minimal disturbance to the run length constraints of the data pattern, and written to a storage medium.

Abstract translation: 一种用于在基于LDPC的驱动系统中产生用于媒体的LDPC编码测试模式的方法，包括将误差检测码数据添加到主要为零比特的测试模式，并且添加额外的零比特以产生期望长度的测试模式。 然后可以对测试图案进行加扰以产生所需的探伤测试图案。 然后，探伤测试模式可以用LDPC码或其他纠错码进行编码，对数据模式的游程长度限制具有最小干扰，并写入存储介质。

公开(公告)号：US09001446B1

公开(公告)日：2015-04-07

申请号：US14194069

申请日：2014-02-28

Applicant: LSI Corporation

Inventor： Bruce A. Wilson ,  Richard Rauschmayer ,  Peter J. Windler ,  Jefferson E. Singleton ,  Shaohua Yang ,  Jeffrey P. Grundvig

IPC: G11B5/09 ,  G11B5/596 ,  G11B20/10

CPC classification number: G11B5/59616 ,  G11B5/09 ,  G11B19/00 ,  G11B20/10037 ,  G11B2005/0008

Abstract: A system and method for power management in a hard disk drive (HDD) assembly incorporating two or more read sensors includes directing a read/write head to follow a track; depowering one or more read sensors and readpath circuits associated with the read sensors; reading an analog readback signal through the first read sensor; processing the signal through an analog front-end to generate an input signal; sampling the input signal through an analog to digital converter at a first frequency to generate a first sampling signal; sampling the input signal through a second analog to digital converter at a second frequency to generate a second sampling signal; and generating a digital output signal from either or both sampling signals at a third sampling frequency through a digital signal processor. The method may additionally comprise adjusting a sampling frequency when power level reaches a threshold.

Abstract translation: 包含两个或更多个读取传感器的硬盘驱动器（HDD）组件中的电源管理的系统和方法包括引导读/写头跟随轨道; 降低与读取的传感器相关联的一个或多个读取传感器和读取路径电路; 通过第一个读取传感器读取模拟回读信号; 通过模拟前端处理信号以产生输入信号; 以第一频率通过模数转换器对输入信号进行采样，以产生第一采样信号; 以第二频率通过第二模数转换器对输入信号进行采样，以产生第二采样信号; 以及通过数字信号处理器以第三采样频率从一个或两个采样信号产生数字输出信号。 该方法还可以包括当功率电平达到阈值时调整采样频率。

公开(公告)号：US08917468B1

公开(公告)日：2014-12-23

申请号：US13941472

申请日：2013-07-13

Applicant: LSI Corporation

Inventor： Jefferson E. Singleton ,  Scott Dziak

IPC: G11B5/09 ,  G11B20/18

CPC classification number: G11B20/182

Abstract: An apparatus for detecting media flaws includes an envelope based media defect detector operable to identify a media defect based on an envelope of an input signal, a periodic pattern detector operable to determine whether the input signal comprises a data pattern, and a media flaw signal generation circuit operable to indicate a media defect when the envelope based media defect detector identifies the media defect and the periodic pattern detector determines that the input signal does not comprise the data pattern.

Abstract translation: 用于检测介质缺陷的装置包括：基于包络的介质缺陷检测器，其可操作以基于输入信号的包络来识别介质缺陷;周期性图案检测器，可操作以确定输入信号是否包括数据模式;以及介质缺陷信号生成 电路，其可操作以在所述基于信封的媒体缺陷检测器识别所述媒体缺陷并且所述周期性图案检测器确定所述输入信号不包括所述数据模式时指示媒体缺陷。

公开(公告)号：US20140362462A1

公开(公告)日：2014-12-11

申请号：US13941472

申请日：2013-07-13

Applicant: LSI Corporation

Inventor： Jefferson E. Singleton ,  Scott Dziak

IPC: G11B20/18

CPC classification number: G11B20/182

Abstract: An apparatus for detecting media flaws includes an envelope based media defect detector operable to identify a media defect based on an envelope of an input signal, a periodic pattern detector operable to determine whether the input signal comprises a data pattern, and a media flaw signal generation circuit operable to indicate a media defect when the envelope based media defect detector identifies the media defect and the periodic pattern detector determines that the input signal does not comprise the data pattern.

Abstract translation: 用于检测介质缺陷的装置包括：基于包络的介质缺陷检测器，其可操作以基于输入信号的包络来识别介质缺陷;周期性图案检测器，可操作以确定输入信号是否包括数据模式;以及介质缺陷信号生成 电路，其可操作以在所述基于信封的媒体缺陷检测器识别所述媒体缺陷并且所述周期性图案检测器确定所述输入信号不包括所述数据模式时指示媒体缺陷。

公开(公告)号：US20150012800A1

公开(公告)日：2015-01-08

申请号：US13952415

申请日：2013-07-26

Applicant: LSI Corporation

Inventor： Shaohua Yang ,  George Mathew ,  Jefferson E. Singleton ,  Jongseung Park ,  Richard Rauschmayer

IPC: G06F11/07

CPC classification number: G11B20/1833 ,  G11B20/10268 ,  H03M13/1102 ,  H03M13/1515 ,  H03M13/2957 ,  H03M13/3723 ,  H03M13/3738 ,  H03M13/3746 ,  H03M13/3753 ,  H03M13/6325 ,  H03M13/6343

Abstract: A data processing system is disclosed including a data detector, a data decoder and an alignment detector. The data detector is operable to apply a data detection algorithm to generate detected values for a data sector. The data decoder is operable to apply a data decode algorithm to a decoder input derived from the detected values to yield decoded values. The alignment detector is operable to calculate an offset between multiple versions of the data sector by correlating the multiple versions.

Abstract translation: 公开了一种数据处理系统，包括数据检测器，数据解码器和对准检测器。 数据检测器可操作以应用数据检测算法来产生数据扇区的检测值。 数据解码器可操作以将数据解码算法应用于从检测值导出的解码器输入，以产生解码值。 对准检测器可操作以通过关联多个版本来计算数据扇区的多个版本之间的偏移。

公开(公告)号：US20140129890A1

公开(公告)日：2014-05-08

申请号：US13672218

申请日：2012-11-08

Applicant: LSI CORPORATION

Inventor： Jefferson E. Singleton ,  Shaohua Yang ,  Bruce A. Wilson ,  Keenan T. O'Brien

IPC: G06F11/263

CPC classification number: H03M13/6356 ,  H03M13/11 ,  H03M13/35 ,  H03M13/63 ,  H03M13/6343

Abstract: A method for producing a LDPC encoded test pattern for media in a LDPC based drive system includes adding error detection code data to a predominantly zero bit test pattern and adding additional zero bits to produce a test pattern of a desirable length. The test pattern may then be scrambled to produce a desirable flaw detection test pattern. The flaw detection test pattern may then be encoding with an LDPC code, or other error correction code with minimal disturbance to the run length constraints of the data pattern, and written to a storage medium.

Abstract translation: 一种用于在基于LDPC的驱动系统中产生用于媒体的LDPC编码测试模式的方法，包括将误差检测码数据添加到主要为零比特的测试模式，并且添加额外的零比特以产生期望长度的测试模式。 然后可以对测试图案进行加扰以产生所需的探伤测试图案。 然后，探伤测试模式可以用LDPC码或其他纠错码进行编码，对数据模式的游程长度限制具有最小干扰，并写入存储介质。