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21.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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22.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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23.发明授权公开(公告)号：US07924523B2
公开(公告)日：2011-04-12
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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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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公开(公告)号：US09305582B2
公开(公告)日：2016-04-05
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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公开(公告)号：US08743936B2
公开(公告)日：2014-06-03
申请号：US12652201
申请日：2010-01-05
申请人： George Mathew , Shaohua Yang , Yuan Xing Lee , Hongwei Song
发明人： George Mathew , Shaohua Yang , Yuan Xing Lee , Hongwei Song
CPC分类号： G11B20/10046 , H04B17/345
摘要： Various embodiments of the present invention provide systems and methods for estimating noise components in a received signal set. For example, one embodiment of the present invention provides a noise estimation circuit that includes a data detector circuit and a noise component calculation circuit. The data detector circuit receives a series of data samples and provides a detected output, and the noise component calculation circuit provides an electronics noise power output and a media noise power output each calculated based at least in part on the detected output and the series of data samples.
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噪声分量的系统和方法。 例如，本发明的一个实施例提供了一种包括数据检测器电路和噪声分量计算电路的噪声估计电路。 数据检测器电路接收一系列数据样本并提供检测的输出，并且噪声分量计算电路提供电子噪声功率输出和媒体噪声功率输出，每个至少部分地基于所检测的输出和数据系列计算 样品。
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公开(公告)号：US20110249361A1
公开(公告)日：2011-10-13
申请号：US12758122
申请日：2010-04-12
申请人： George Mathew , Jeffrey Grundvig , Hongwei Song , Yuan Xing Lee
发明人： George Mathew , Jeffrey Grundvig , Hongwei Song , Yuan Xing Lee
IPC分类号： G11B21/02
CPC分类号： G11B5/6029 , G11B5/012 , G11B5/6064
摘要： In one embodiment, a hard-disk drive system performs fly-height control using a read-back mode and a loop-back mode. The read-back mode measures first and second harmonics pre-recorded on the medium and divides the first measurement by the second to obtain a read-back mode harmonic ratio. The loop-back mode measures the same first and second harmonics; however, the harmonics are provided by a write precompensation circuit rather than the medium. Further, the loop-back mode measurements are performed using asynchronous sampling to address aliasing and quantization errors. The first measurement is divided by the second to generate a loop-back harmonic ratio. In logarithm domain, the loop-back ratio is subtracted from the read-back mode ratio to remove environment-induced variations in the read path electronic circuits. The resulting harmonic ratio is subtracted from an initial harmonic ratio determined, for example, during manufacturing, to determine how much the harmonic ratio has changed.
摘要翻译： 在一个实施例中，硬盘驱动器系统使用回读模式和循环模式来执行飞行高度控制。 回读模式测量在介质上预先记录的第一和第二次谐波，并将第一次测量除以秒，以获得回读模式谐波比。 环回模式测量相同的第一和第二谐波; 然而，谐波由写入预补偿电路而不是介质提供。 此外，使用异步采样来执行环回模式测量以解决混叠和量化误差。 第一次测量除以二次以产生回路谐波比。 在对数域中，从回读模式比率中减去回路比，以消除读取路径电子电路中的环境引起的变化。 从制造时例如确定的初始谐波比减去得到的谐波比，以确定谐波比已经改变了多少。
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