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31.发明授权Systems and methods for fly-height control using servo address mark data 有权使用伺服地址标记数据进行飞行高度控制的系统和方法公开(公告)号：US08054573B2
公开(公告)日：2011-11-08
申请号：US12663336
申请日：2008-10-27
IPC分类号： G11B5/60
CPC分类号： G11B5/59688 , G11B5/6029
摘要： Various embodiments of the present invention provide systems and methods for determining fly-height adjustments. For example, various embodiments of the present invention provide storage devices that include a storage medium, a read/write head assembly disposed in relation to the storage medium (278), and a SAM based fly-height adjustment circuit (214). The storage medium (278) includes a plurality of servo data regions (110) that each include a servo address mark (154). The SAM based fly-height adjustment circuit (214) receives the servo address mark (154) from the plurality of servo data regions (110) via the read/write head assembly (276), and calculates a first harmonics ratio (445) based on the received data. The first harmonics ratio (445) is compared with a second harmonics ratio (450) to determine an error (365) in the distance (295) between the read/write head assembly (276) and the storage medium (278).
摘要翻译： 本发明的各种实施例提供了用于确定飞行高度调节的系统和方法。 例如，本发明的各种实施例提供了包括存储介质，相对于存储介质（278）设置的读/写头组件和基于SAM的飞高调节电路（214））的存储设备。 存储介质（278）包括多个伺服数据区域（110），每个伺服数据区域包括伺服地址标记（154）。 基于SAM的飞高调整电路（214）经由读/写头组件（276）从多个伺服数据区（110）接收伺服地址标记（154），并且基于第一谐波比（445）计算 接收到的数据。 将第一谐波比（445）与第二谐波比（450）进行比较，以确定读/写头组件（276）和存储介质（278）之间的距离（295）中的误差（365）。
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32.发明授权AGC loop with weighted zero forcing and LMS error sources and methods for using such 有权具有加权零强制和LMS误差源的AGC环路及其使用方法公开(公告)号：US07872823B2
公开(公告)日：2011-01-18
申请号：US12352540
申请日：2009-01-12
申请人： Jingfeng Liu , Hongwei Song , Jongseung Park , George Mathew , Yuan Xing Lee
发明人： Jingfeng Liu , Hongwei Song , Jongseung Park , George Mathew , Yuan Xing Lee
IPC分类号： G11B5/09
CPC分类号： G11B5/09 , G11B20/10009 , G11B20/10027 , G11B20/10046 , H03G3/30 , H03M1/185
摘要： Various embodiments of the present invention provide systems and methods for gain control. For example, some embodiments of the present invention provide variable gain control circuits. Such circuits include a zero forcing loop generating a zero forcing feedback and a least mean square loop generating a least mean square feedback. An error quantization circuit generates a hybrid feedback based upon a threshold condition using the zero forcing feedback and the least mean square feedback. A variable gain amplifier is at least in part controlled by a derivative of the hybrid feedback.
摘要翻译： 本发明的各种实施例提供用于增益控制的系统和方法。 例如，本发明的一些实施例提供可变增益控制电路。 这种电路包括产生零强制反馈的零强制环路和产生最小均方反馈的最小均方环路。 误差量化电路使用零强制反馈和最小均方反馈基于阈值条件产生混合反馈。 可变增益放大器至少部分地由混合反馈的导数来控制。
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33.发明申请Systems and Methods for Fly-Height Control Using Servo Address Mark Data 有权使用伺服地址标记数据进行飞行高度控制的系统和方法公开(公告)号：US20100177430A1
公开(公告)日：2010-07-15
申请号：US12663336
申请日：2008-10-27
IPC分类号： G11B21/02
CPC分类号： G11B5/59688 , G11B5/6029
摘要： Various embodiments of the present invention provide systems and methods for determining fly-height adjustments. For example, various embodiments of the present invention provide storage devices that include a storage medium, a read/write head assembly disposed in relation to the storage medium (278), and a SAM based fly-height adjustment circuit (214). The storage medium (278) includes a plurality of servo data regions (110) that each include a servo address mark (154). The SAM based fly-height adjustment circuit (214) receives the servo address mark (154) from the plurality of servo data regions (110) via the read/write head assembly (276), and calculates a first harmonics ratio (445) based on the received data. The first harmonics ratio (445) is compared with a second harmonics ratio (450) to determine an error (365) in the distance (295) between the read/write head assembly (276) and the storage medium (278).
摘要翻译： 本发明的各种实施例提供了用于确定飞行高度调节的系统和方法。 例如，本发明的各种实施例提供了包括存储介质，相对于存储介质（278）设置的读/写头组件和基于SAM的飞高调节电路（214））的存储设备。 存储介质（278）包括多个伺服数据区域（110），每个伺服数据区域包括伺服地址标记（154）。 基于SAM的飞高调整电路（214）经由读/写头组件（276）从多个伺服数据区（110）接收伺服地址标记（154），并且基于第一谐波比（445）计算 接收到的数据。 将第一谐波比（445）与第二谐波比（450）进行比较，以确定读/写头组件（276）和存储介质（278）之间的距离（295）中的误差（365）。
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公开(公告)号：US20100053787A1
公开(公告)日：2010-03-04
申请号：US12199379
申请日：2008-08-27
申请人： George Mathew , Yuan Xing Lee , Hongwei Song
发明人： George Mathew , Yuan Xing Lee , Hongwei Song
IPC分类号： G11B5/02
CPC分类号： G11B5/09 , G11B20/10194
摘要： Various embodiments of the present invention provide systems and methods for write pre-compensation. For example, various embodiments of the present invention provide systems for on-the-fly estimation of write pre-compensation values. Such systems include a magnetic storage medium, a read/write head assembly disposed in relation to the magnetic storage medium, and an analog to digital converter that receives an analog signal from the read/write head assembly corresponding to a data set stored on the magnetic storage medium and provides a series of digital samples corresponding to the data set. The storage devices further include a read data processing circuit that receives the same series of digital samples and provides a user data output, and a pre-compensation value calculation circuit that receives the series of digital samples and provides an updated write pre-compensation value.
摘要翻译： 本发明的各种实施例提供了用于写入预补偿的系统和方法。 例如，本发明的各种实施例提供用于写入预补偿值的即时估计的系统。 这样的系统包括磁存储介质，相对于磁存储介质设置的读/写头组件和模数转换器，其从读/写头组件接收对应于存储在磁盘上的数据集的模拟信号 并提供与数据集相对应的一系列数字样本。 存储装置还包括读取数据处理电路，其接收相同系列的数字样本并提供用户数据输出，以及预补偿值计算电路，其接收一系列数字样本并提供更新的写入预补偿值。
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35.发明申请公开(公告)号：US20090161245A1
公开(公告)日：2009-06-25
申请号：US12273265
申请日：2008-11-18
IPC分类号： G11B5/035
CPC分类号： G11B20/10212 , G11B20/10046 , G11B20/10194 , G11B20/24 , G11B2220/2516
摘要： Various embodiments of the present invention provide systems and methods for equalizing an input signal. For example, various embodiments of the present invention provide a method for performing equalization in a storage device. Such methods include providing an equalizer circuit that is governed by a target value, and a filter circuit that is governed by a filter coefficient. An initial value is provided to the equalizer circuit as the target value, and an overall target based at least in part on the initial value and the filter coefficient is calculated. An updated value is calculated based on the overall target, and the updated value is provided to the equalizer circuit as the target value.
摘要翻译： 本发明的各种实施例提供了用于均衡输入信号的系统和方法。 例如，本发明的各种实施例提供了一种用于在存储设备中执行均衡的方法。 这样的方法包括提供由目标值控制的均衡器电路和由滤波器系数控制的滤波器电路。 将初始值作为目标值提供给均衡器电路，并且至少部分地基于初始值和滤波器系数来计算总体目标。 基于总体目标计算更新的值，并且将更新的值作为目标值提供给均衡器电路。
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36.发明授权Amplitude-based approach for detection and classification of hard-disc defect regions 失效基于幅度的硬盘缺陷区域检测和分类方法公开(公告)号：US08045283B2
公开(公告)日：2011-10-25
申请号：US12729312
申请日：2010-03-23
申请人： Shaohua Yang , George Mathew , Yang Han , Zongwang Li , Yuan Xing Lee
发明人： Shaohua Yang , George Mathew , Yang Han , Zongwang Li , Yuan Xing Lee
CPC分类号： G11B20/1816 , G11B20/1883 , G11B2005/0018 , G11B2020/1823 , G11B2220/20 , G11B2220/2516
摘要： In a hard-disc drive, a defect region on the hard disc is classified as corresponding to either thermal asperity (TA) or media defect (MD) by generating two statistical measures. A first measure (e.g., α1) is based on (i) the magnitudes of one or both of signal values (e.g., equalizer input or output signal values) and the corresponding expected values of those signal values and (ii) the signs of one or both of the signal values and the expected signal values. A second measure (e.g., α2) is based on the magnitudes of one or both of the signal values and the expected signal values, but not the signs of either the signal values or the expected signal values. The two measures are then compared to determine whether the defect region corresponds to TA or MD.
摘要翻译： 在硬盘驱动器中，通过产生两个统计测量值将硬盘上的缺陷区域分类为对应于热粗糙度（TA）或介质缺陷（MD）。 第一测量（例如，α1）基于（i）信号值（例如，均衡器输入或输出信号值）中的一个或两个的大小以及那些信号值的相应期望值，以及（ii）一个 或信号值和预期信号值两者。 第二量度（例如，α2）基于信号值和预期信号值中的一个或两个的幅度，而不是信号值或期望信号值的符号。 然后比较两个测量值以确定缺陷区域是否对应于TA或MD。
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公开(公告)号：US20090235116A1
公开(公告)日：2009-09-17
申请号：US12111902
申请日：2008-04-29
申请人： Weijun Tan , Shaohua Yang , George Mathew , Kelly Fitzpatrick , Hao Zhong , Yuan Xing Lee
发明人： Weijun Tan , Shaohua Yang , George Mathew , Kelly Fitzpatrick , Hao Zhong , Yuan Xing Lee
IPC分类号： G06F11/07
CPC分类号： G06F11/0793 , G06F11/0727 , G11B20/1816
摘要： Various embodiments of the present invention provide systems and methods for data regeneration. For example, a system for data regeneration is disclosed that includes a data input derived from the medium. A data detector and a data recovery system receive the data input. The data detector provides a first soft output, and the data recovery system provides a second soft output. The first soft output and the second soft output are provided to a multiplexer. A media defect detector performs a media defect detection process, and provides a defect flag that indicates whether the data input is derived form a defective portion of the medium. The defect flag is provided to the multiplexer where it is used to select whether the first soft output or the second soft output is provides as an extrinsic output.
摘要翻译： 本发明的各种实施例提供了用于数据再生的系统和方法。 例如，公开了一种用于数据再生的系统，其包括从介质导出的数据输入。 数据检测器和数据恢复系统接收数据输入。 数据检测器提供第一软输出，数据恢复系统提供第二软输出。 第一软输出和第二软输出被提供给多路复用器。 介质缺陷检测器执行介质缺陷检测处理，并且提供指示数据输入是否从介质的缺陷部分导出的缺陷标志。 缺陷标志被提供给多路复用器，其中它用于选择第一软输出或第二软输出是作为外在输出提供。
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38.发明授权Systems and methods for using intrinsic data for regenerating data from a defective medium 有权使用固有数据从有缺陷的介质再生数据的系统和方法公开(公告)号：US08161357B2
公开(公告)日：2012-04-17
申请号：US12111867
申请日：2008-04-29
申请人： Weijun Tan , Shaohua Yang , George Mathew , Kelly Fitzpatrick , Hao Zhong , Yuan Xing Lee
发明人： Weijun Tan , Shaohua Yang , George Mathew , Kelly Fitzpatrick , Hao Zhong , Yuan Xing Lee
IPC分类号： H03M13/00
CPC分类号： H03M13/2957 , H03M13/1102 , H03M13/6331
摘要： Various embodiments of the present invention provide systems and methods for data regeneration. For example, a system for data regeneration is disclosed that includes a data input derived from the medium. A data detector and a data recovery system receive the data input. The data detector provides a first soft output, and the data recovery system provides a second soft output. The first soft output and the second soft output are provided to a multiplexer. A media defect detector performs a media defect detection process, and provides a defect flag that indicates whether the data input is derived from a defective portion of the medium. The defect flag is provided to the multiplexer where it is used to select whether the first soft output or the second soft output is provides as an extrinsic output.
摘要翻译： 本发明的各种实施例提供了用于数据再生的系统和方法。 例如，公开了一种用于数据再生的系统，其包括从介质导出的数据输入。 数据检测器和数据恢复系统接收数据输入。 数据检测器提供第一软输出，数据恢复系统提供第二软输出。 第一软输出和第二软输出被提供给多路复用器。 介质缺陷检测器执行介质缺陷检测处理，并提供指示是否从介质的缺陷部分导出数据输入的缺陷标志。 缺陷标志被提供给多路复用器，其中它用于选择第一软输出或第二软输出是作为外在输出提供。
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公开(公告)号：US08095855B2
公开(公告)日：2012-01-10
申请号：US12111902
申请日：2008-04-29
申请人： Weijun Tan , Shaohua Yang , George Mathew , Kelly Fitzpatrick , Hao Zhong , Yuan Xing Lee
发明人： Weijun Tan , Shaohua Yang , George Mathew , Kelly Fitzpatrick , Hao Zhong , Yuan Xing Lee
IPC分类号： H03M13/00
CPC分类号： G06F11/0793 , G06F11/0727 , G11B20/1816
摘要： Various embodiments of the present invention provide systems and methods for data regeneration. For example, a system for data regeneration is disclosed that includes a data input derived from the medium. A data detector and a data recovery system receive the data input. The data detector provides a first soft output, and the data recovery system provides a second soft output. The first soft output and the second soft output are provided to a multiplexer. A media defect detector performs a media defect detection process, and provides a defect flag that indicates whether the data input is derived form a defective portion of the medium. The defect flag is provided to the multiplexer where it is used to select whether the first soft output or the second soft output is provides as an extrinsic output.
摘要翻译： 本发明的各种实施例提供了用于数据再生的系统和方法。 例如，公开了一种用于数据再生的系统，其包括从介质导出的数据输入。 数据检测器和数据恢复系统接收数据输入。 数据检测器提供第一软输出，数据恢复系统提供第二软输出。 第一软输出和第二软输出被提供给多路复用器。 介质缺陷检测器执行介质缺陷检测处理，并提供指示数据输入是否从介质的缺陷部分导出的缺陷标志。 缺陷标志被提供给多路复用器，其中它用于选择第一软输出或第二软输出是作为外在输出提供。
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40.发明授权Frequency-based approach for detection and classification of hard-disc defect regions 有权基于频率的硬盘缺陷区域检测和分类方法公开(公告)号：US08031420B2
公开(公告)日：2011-10-04
申请号：US12707820
申请日：2010-02-18
申请人： George Mathew , Yang Han , Shaohua Yang , Zongwang Li , Yuan Xing Lee
发明人： George Mathew , Yang Han , Shaohua Yang , Zongwang Li , Yuan Xing Lee
CPC分类号： G11B20/1816 , G11B19/041 , G11B27/36
摘要： In a hard-disc drive read channel, frequency-based measures are generated at two different data frequencies (e.g., 2T and DC) by applying a transform, such as a discrete Fourier transform (DFT), to signal values, such as ADC or equalizer output values, corresponding to, e.g., a 2T data pattern stored on the hard disc. The frequency-based measures are used to detect defect regions on the hard disc and/or to classify defect regions as being due to either thermal asperity (TA) or drop-out media defect (MD).
摘要翻译： 在硬盘驱动读取通道中，通过将诸如离散付里叶变换（DFT）之类的变换应用于信号值（例如ADC或ADC），以两个不同的数据频率（例如，2T和DC）生成基于频率的测量 均衡器输出值，对应于例如存储在硬盘上的2T数据模式。 基于频率的测量用于检测硬盘上的缺陷区域和/或将缺陷区域分类为由于热粗糙度（TA）或脱落介质缺陷（MD）引起的。
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