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公开(公告)号：US08139305B2
公开(公告)日：2012-03-20
申请号：US12558928
申请日：2009-09-14
申请人： George Mathew , Hongwei Song , Yuan Xing Lee
发明人： George Mathew , Hongwei Song , Yuan Xing Lee
IPC分类号： G11B5/35
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10222 , G11B20/10435 , G11B20/1049 , G11B2220/2516
摘要： Various embodiments of the present invention provide systems and methods for acquiring timing and/or gain information. For example, various embodiments of the present invention provide data processing circuits that include a sample splitting circuit, a first averaging circuit, a second averaging circuit and a parameter calculation circuit. The sample splitting circuit receives a data input that includes a series of samples that repeat periodically over at least a first phase and a second phase. The sample splitting circuit divides the series of samples into at least a first sub-stream corresponding to the first phase and a second sub-stream corresponding to the second phase. The first averaging circuit averages values from the first sub-stream to yield a first average, and the second averaging circuit averages values from the second sub-stream to yield a second average. The parameter calculation circuit calculates a parameter value based at least in part on the first average and the second average.
摘要翻译： 本发明的各种实施例提供了用于获取定时和/或增益信息的系统和方法。 例如，本发明的各种实施例提供了包括采样分离电路，第一平均电路，第二平均电路和参数计算电路的数据处理电路。 采样分离电路接收包括在至少第一阶段和第二阶段周期性地重复的一系列样本的数据输入。 样本分割电路将该系列样本划分成对应于第一相的至少第一子流和对应于第二相的第二子流。 第一平均电路平均来自第一子流的值以产生第一平均值，并且第二平均电路平均来自第二子流的值以产生第二平均值。 参数计算电路至少部分地基于第一平均值和第二平均值来计算参数值。
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22.发明申请公开(公告)号：US20120038998A1
公开(公告)日：2012-02-16
申请号：US12856782
申请日：2010-08-16
申请人： George Mathew , Yuan Xing Lee , Hongwei Song
发明人： George Mathew , Yuan Xing Lee , Hongwei Song
CPC分类号： G11B5/6029
摘要： Various embodiments of the present invention provide systems and methods for phase offset based spectral aliasing compensation. For example, a circuit for spectral aliasing reduction is disclosed that includes a phase shift circuit operable to phase shift an analog input signal and to provide a phase shifted analog signal; a first analog to digital converter circuit operable to provide a first series of digital samples corresponding to the analog input signal at a sampling frequency; a second analog to digital converter circuit operable to provide a second series of digital samples corresponding to the phase shifted analog signal at the sampling frequency; and an averaging circuit operable to average the first series of digital samples with the second series of digital samples to yield an average output.
摘要翻译： 本发明的各种实施例提供了基于相位偏移的光谱混叠补偿的系统和方法。 例如，公开了一种用于频谱混叠减小的电路，其包括可移相模拟输入信号并提供相移模拟信号的相移电路; 第一模数转换器电路，其可操作来以采样频率提供对应于模拟输入信号的第一系列数字采样; 第二模数转换器电路，其可操作以提供对应于采样频率的相移模拟信号的第二系列数字采样; 以及平均电路，其可操作以用第二系列数字样本来平均第一系列数字样本以产生平均输出。
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23.发明授权Systems and methods for using an on-the-fly CBD estimate to adjust fly-height 有权使用实时CBD估算来调整飞行高度的系统和方法公开(公告)号：US08014099B2
公开(公告)日：2011-09-06
申请号：US12254737
申请日：2008-10-20
IPC分类号： G11B5/60
CPC分类号： G11B5/6029
摘要： Various embodiments of the present invention provide systems and methods for using channel bit density estimates to adjust fly-height. For example, various embodiments of the present invention provide methods for adaptively adjusting fly-height. Such methods include providing a storage medium that includes information corresponding to a process data set, and a read/write head assembly that is disposed a variable distance from the storage medium. The process data set is accessed from the storage medium. A first channel bit density estimate is adaptively calculated based at least in part on the process data set and a second channel bit density estimate that was previously calculated. The variable distance is modified based at least in part on the first channel bit density estimate. A third channel bit density is adaptively calculated based at least in part on the process data set and a fourth channel bit density estimate that was previously calculated. The variable distance is modified based at least in part on the third channel bit density estimate.
摘要翻译： 本发明的各种实施例提供了使用信道比特密度估计来调整飞行高度的系统和方法。 例如，本发明的各种实施例提供了用于自适应地调整飞行高度的方法。 这样的方法包括提供包括对应于过程数据集的信息的存储介质以及与存储介质可变距离设置的读/写头组件。 从存储介质访问过程数据集。 至少部分地基于过程数据集和先前计算的第二信道比特密度估计自适应地计算第一信道比特密度估计。 至少部分地基于第一信道比特密度估计修改可变距离。 至少部分地基于过程数据集和先前计算的第四通道位密度估计来自适应地计算第三通道位密度。 至少部分地基于第三通道位密度估计修改可变距离。
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公开(公告)号：US07924518B2
公开(公告)日：2011-04-12
申请号：US12199325
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 methods for modifying magnetic information transfer. The methods include retrieving magnetically represented data from a storage medium, and converting the magnetically represented data to a series of data samples. A preceding pattern and a transition status is identified in the series of data samples, and an equalized channel response is computed based on an estimated NLTS value. An error value is computed that corresponds to a difference between the estimated NLTS value and an actual NLTS value, and a pre-compensation value is computed based at least in part on the error 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了用于修改磁信息传送的方法。 所述方法包括从存储介质检索磁性表示的数据，并将磁性表示的数据转换成一系列数据样本。 在一系列数据样本中识别出先前的模式和转变状态，并且基于估计的NLTS值来计算均衡的信道响应。 计算对应于估计的NLTS值和实际NLTS值之间的差异的误差值，并且至少部分地基于误差值计算预补偿值。
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公开(公告)号：US20110063747A1
公开(公告)日：2011-03-17
申请号：US12558928
申请日：2009-09-14
申请人： George Mathew , Hongwei Song , Yuan Xing Lee
发明人： George Mathew , Hongwei Song , Yuan Xing Lee
IPC分类号： G11B20/10
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10222 , G11B20/10435 , G11B20/1049 , G11B2220/2516
摘要： Various embodiments of the present invention provide systems and methods for acquiring timing and/or gain information. For example, various embodiments of the present invention provide data processing circuits that include a sample splitting circuit, a first averaging circuit, a second averaging circuit and a parameter calculation circuit. The sample splitting circuit receives a data input that includes a series of samples that repeat periodically over at least a first phase and a second phase. The sample splitting circuit divides the series of samples into at least a first sub-stream corresponding to the first phase and a second sub-stream corresponding to the second phase. The first averaging circuit averages values from the first sub-stream to yield a first average, and the second averaging circuit averages values from the second sub-stream to yield a second average. The parameter calculation circuit calculates a parameter value based at least in part on the first average and the second average.
摘要翻译： 本发明的各种实施例提供了用于获取定时和/或增益信息的系统和方法。 例如，本发明的各种实施例提供了包括采样分离电路，第一平均电路，第二平均电路和参数计算电路的数据处理电路。 采样分离电路接收包括在至少第一阶段和第二阶段周期性地重复的一系列样本的数据输入。 样本分割电路将该系列样本划分成对应于第一相的至少第一子流和对应于第二相的第二子流。 第一平均电路平均来自第一子流的值以产生第一平均值，并且第二平均电路平均来自第二子流的值以产生第二平均值。 参数计算电路至少部分地基于第一平均值和第二平均值来计算参数值。
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公开(公告)号：US20110043938A1
公开(公告)日：2011-02-24
申请号：US12663355
申请日：2008-10-27
CPC分类号： G11B5/6029 , G11B5/59688
摘要： Various embodiments of the present invention provide systems and methods for determining changes in fly-height. For example, various embodiments of the present invention provide storage devices that include a storage medium having servo data thereon. A read/write head assembly is disposed in relation to the storage medium. A servo based fly-height adjustment circuit receives the servo data via the read/write head assembly, and calculates a first harmonics ratio based on the received data and compares the first harmonics ratio with a second harmonics ratio to determine an error in the distance between the read/write head assembly and the storage medium.
摘要翻译： 本发明的各种实施例提供用于确定飞行高度变化的系统和方法。 例如，本发明的各种实施例提供了包括其上具有伺服数据的存储介质的存储设备。 相对于存储介质设置读/写头组件。 基于伺服的飞高调节电路经由读/写头组件接收伺服数据，并且基于接收到的数据计算第一谐波比，并将第一谐波比与二次谐波比进行比较，以确定第二谐波比之间的距离误差 读/写头组件和存储介质。
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27.发明申请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：US20100177419A1
公开(公告)日：2010-07-15
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
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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28.发明申请Systems and Methods for Using an On-the-fly CBD Estimate to Adjust Fly-Height 有权使用实时CBD估计来调整飞行高度的系统和方法公开(公告)号：US20090154003A1
公开(公告)日：2009-06-18
申请号：US12254737
申请日：2008-10-20
IPC分类号： G11B21/02
CPC分类号： G11B5/6029
摘要： Various embodiments of the present invention provide systems and methods for using channel bit density estimates to adjust fly-height. For example, various embodiments of the present invention provide methods for adaptively adjusting fly-height. Such methods include providing a storage medium that includes information corresponding to a process data set, and a read/write head assembly that is disposed a variable distance from the storage medium. The process data set is accessed from the storage medium. A first channel bit density estimate is adaptively calculated based at least in part on the process data set and a second channel bit density estimate that was previously calculated. The variable distance is modified based at least in part on the first channel bit density estimate. A third channel bit density is adaptively calculated based at least in part on the process data set and a fourth channel bit density estimate that was previously calculated. The variable distance is modified based at least in part on the third channel bit density estimate.
摘要翻译： 本发明的各种实施例提供了使用信道比特密度估计来调整飞行高度的系统和方法。 例如，本发明的各种实施例提供了用于自适应地调整飞行高度的方法。 这样的方法包括提供包括对应于过程数据集的信息的存储介质以及与存储介质可变距离设置的读/写头组件。 从存储介质访问过程数据集。 至少部分地基于过程数据集和先前计算的第二信道比特密度估计自适应地计算第一信道比特密度估计。 至少部分地基于第一信道比特密度估计修改可变距离。 至少部分地基于过程数据集和先前计算的第四通道位密度估计来自适应地计算第三通道位密度。 至少部分地基于第三通道位密度估计修改可变距离。
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29.发明授权公开(公告)号：US09281908B2
公开(公告)日：2016-03-08
申请号：US12247378
申请日：2008-10-08
申请人： George Mathew , Yuan Xing Lee , Hongwei Song , David L. Parker , Scott M. Dziak
发明人： George Mathew , Yuan Xing Lee , Hongwei Song , David L. Parker , Scott M. Dziak
IPC分类号： G06F17/10 , H04B17/327 , H04B17/26
CPC分类号： H04B17/327 , H04B17/26
摘要： Various embodiments of the present invention provide systems and methods for estimating signal and noise powers in a received signal set. For example, one embodiment of the present invention provides a method for determining signal power and noise power. The method uses a storage medium that includes a Na×Nw data pattern. The Na×Nw data pattern includes Na bits repeated Nw times. Both Na and Nw are each greater than one. The methods further include performing an initial read of the Na×Nw data pattern, which is stored to a first register. Nr subsequent reads of the Na×Nw data pattern are each processed by: performing a subsequent read of the Na×Nw data pattern, and performing a difference calculation using the initial read of the Na×Nw data pattern and the subsequent read of the Na×Nw data pattern and resulting in the calculation of a difference vector that is stored to a second register; and performing a difference accumulation calculation to generate an accumulation vector which is stored to a third register. Based at least in part on the stored Na×Nw data pattern and the stored difference vector, an electronics noise power is calculated.
摘要翻译： 本发明的各种实施例提供了用于估计接收信号组中的信号和噪声功率的系统和方法。 例如，本发明的一个实施例提供了一种用于确定信号功率和噪声功率的方法。 该方法使用包括Na×Nw数据模式的存储介质。 Na×Nw数据模式包括重复N次的Na比特。 Na和Nw都大于1。 所述方法还包括执行存储到第一寄存器的Na×Nw数据模式的初始读取。 N×Nw数据模式的后续读取各自通过以下处理：执行Na×Nw数据模式的后续读取，并且使用Na×Nw数据模式的初始读取和随后的Na读数执行差分计算 ×Nw数据模式，并导致存储到第二寄存器的差矢量的计算; 以及执行差积累计算，以产生存储到第三寄存器的累加向量。 至少部分地基于存储的Na×Nw数据模式和存储的差分矢量，计算电子噪声功率。
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30.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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