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61. 发明申请

US20130148229A1 IMPLEMENTING SPIN-TORQUE OSCILLATOR SENSING WITH ENHANCED DELAY CONTROL FEEDBACK CIRCUIT FOR HARD DISK DRIVES 有权
标题翻译：用于硬盘驱动器的增强型延迟控制反馈电路实现旋转振动振荡器
公开(公告)号：US20130148229A1
公开(公告)日：2013-06-13
申请号：US13316407
申请日：2011-12-09
申请人： Patrick Mesquita Braganca , Richard Leo Galbraith , Bruce Alvin Gurney , Neil Smith , Bruce Wilson , Rehan Ahmed Zakai
发明人： Patrick Mesquita Braganca , Richard Leo Galbraith , Bruce Alvin Gurney , Neil Smith , Bruce Wilson , Rehan Ahmed Zakai
IPC分类号： G11B5/02
CPC分类号： G11B5/02 , G11B5/3903 , G11B2005/0016
摘要： A method, apparatus, and system for implementing spin-torque oscillator (STO) sensing with an enhanced delay control feedback circuit for hard disk drives. A detector receives an input signal from a STO read sensor having an oscillation frequency related to the strength of the detected magnetic signal field. The received input signal is mixed with a time delayed input signal for providing a detector output signal. A low frequency component signal of the detector output signal is monitored and a delay control feedback is applied to an adjustable time delay to bias the DC signal of the detector output signal.
摘要翻译：一种用于实现用于硬盘驱动器的增强型延迟控制反馈电路实现自旋扭矩振荡器（STO）感测的方法，装置和系统。检测器从具有与所检测的磁信号场的强度相关的振荡频率的STO读取传感器接收输入信号。所接收的输入信号与用于提供检测器输出信号的时间延迟输入信号混合。监视检测器输出信号的低频分量信号，并将延迟控制反馈应用于可调节的时间延迟以偏置检测器输出信号的DC信号。

62. 发明申请

US20130100550A1 IMPLEMENTING MAGNETIC DEFECT CLASSIFICATION USING PHASE MODULATION 失效
标题翻译：使用相位调制实现磁性缺陷分类
公开(公告)号：US20130100550A1
公开(公告)日：2013-04-25
申请号：US13277047
申请日：2011-10-19
申请人： Richard Leo Galbraith , Weldon Mark Hanson , Martin Aureliano Hassner , Travis Roger Oenning , Satoshi Yamamoto
发明人： Richard Leo Galbraith , Weldon Mark Hanson , Martin Aureliano Hassner , Travis Roger Oenning , Satoshi Yamamoto
IPC分类号： G11B20/18
CPC分类号： G11B5/09 , G11B20/18 , G11B27/36 , G11B2020/1826 , G11B2220/2516
摘要： A method, apparatus, and system are provided for implementing magnetic defect classification using phase modulation for hard disk drives. A magnetic media readback signal of a hard disk drive is processed to identify predefined phase modulation (PM) characteristics to implement magnetic defect classification of magnetic media bump and pit defects.
摘要翻译：提供了一种使用硬盘驱动器的相位调制实现磁缺陷分类的方法，装置和系统。处理硬盘驱动器的磁性媒体回读信号以识别预定的相位调制（PM）特性，以实现磁性介质凸起和凹坑缺陷的磁性缺陷分类。

63. 发明申请

US20120166707A1 Data management in flash memory using probability of charge disturbances 有权
标题翻译：使用电荷扰动概率的闪存中的数据管理
公开(公告)号：US20120166707A1
公开(公告)日：2012-06-28
申请号：US12930013
申请日：2010-12-22
申请人： Luiz M. Franca-Neto , Richard Leo Galbraith , Travis Roger Oenning
发明人： Luiz M. Franca-Neto , Richard Leo Galbraith , Travis Roger Oenning
IPC分类号： G06F12/02
CPC分类号： G11C29/50 , G06F11/1048 , G11C2029/5002
摘要： A Flash memory system and a method for data management using the system's sensitivity to charge-disturbing operations and the history of charge-disturbing operations executed by the system are described. In an embodiment of the invention, the sensitivity to charge-disturbing operations is embodied in a disturb-strength matrix in which selected operations have an associated numerical value that is an estimate of the relative strength of that operation to cause disturbances in charge that result in data errors. The disturb-strength matrix should also include the direction of the error which indicates either a gain or loss of charge. The disturb-strength matrix can be determined by the device conducting a self-test in which changes in the measured dispersion value are provoked by executing a selected operation until a detectable change occurs. In alternative embodiments the disturb-strength matrix is determined by testing selected units from a homogeneous population.
摘要翻译：描述了使用系统对充电干扰操作的灵敏度和系统执行的充电干扰操作的历史的数据管理的闪存系统和方法。在本发明的一个实施例中，对电荷干扰操作的灵敏度体现在干扰强度矩阵中，其中所选择的操作具有相关联的数值，该相关数值是该操作的相对强度的估计，以引起电荷干扰，导致导致数据错误。干扰强度矩阵还应包括指示电荷增益或损失的误差方向。干扰强度矩阵可以由进行自检的装置确定，其中通过执行所选择的操作来激发测量的色散值的变化，直到发生可检测的变化。在替代实施例中，通过从均匀群体测试所选择的单位来确定干扰强度矩阵。

64. 发明申请

US20120163074A1 Early degradation detection in flash memory using test cells 有权
标题翻译：使用测试单元的闪存中的早期劣化检测
公开(公告)号：US20120163074A1
公开(公告)日：2012-06-28
申请号：US12930020
申请日：2010-12-22
申请人： Luiz M. Franca-Neto , Richard Leo Galbraith , Travis Roger Oenning
发明人： Luiz M. Franca-Neto , Richard Leo Galbraith , Travis Roger Oenning
IPC分类号： G11C16/06 , G11C16/04
CPC分类号： G11C11/5642 , G11C16/00 , G11C16/3418 , G11C16/349 , G11C29/24 , G11C29/50004 , G11C2211/5634
摘要： A Flash memory system and a method for data management using the embodiments of the invention use special test cells with Early Degradation Detection (EDD) circuitry instead of using the actual user-data storage cells are described. The Flash memory test cells can be made to serve as a “canary in a coal mine” by being made more sensitive than the standard cells by using experimentally determined sensitive write VT and variable read VT. Techniques for early degradation detection (EDD) in Flash memories measure the dispersion of the threshold voltages (VT's), of a set (e.g. page) of NAND Flash memory cells during read operations. In an embodiment of the invention the time-to-completion (TTC) values for the read operation for the memory cells are used as a proxy for dispersion of the threshold voltages (VT's). A Dispersion Analyzer determines the dispersion of the set of TTC values.
摘要翻译：描述使用本发明的实施例的闪存系统和数据管理方法，使用具有早期降解检测（EDD）电路的特殊测试单元而不是使用实际的用户数据存储单元。闪存测试单元可以通过使用实验确定的敏感写入VT和可变读取VT，使其比标准单元更为灵敏，成为“煤矿中的金丝雀”。用于闪速存储器中的早期劣化检测（EDD）的技术测量读取操作期间的一组（例如，页）NAND闪存单元的阈值电压（VT）的偏差。在本发明的一个实施例中，用于存储器单元的读取操作的完成时间（TTC）值用作阈值电压（VT）的色散的代理。色散分析仪确定一组TTC值的色散。

65. 发明授权

US08166376B2 Techniques for correcting errors and erasures using a single-shot generalized minimum distance key equation solver 有权
标题翻译：使用单次广义最小距离密钥方程求解器纠正错误和擦除的技术
公开(公告)号：US08166376B2
公开(公告)日：2012-04-24
申请号：US12099532
申请日：2008-04-08
申请人： Martin Hassner , Travis Roger Oenning , Richard Leo Galbraith
发明人： Martin Hassner , Travis Roger Oenning , Richard Leo Galbraith
IPC分类号： G06F11/00
CPC分类号： H03M13/455 , H03M13/1515 , H03M13/1525 , H03M13/154
摘要： A system corrects errors in a codeword. The system includes a channel that sorts reliability numbers of symbols in the codeword to create an ordered list of candidate erasure locations. The system also includes a generalized minimum distance decoder that iteratively processes the ordered list of candidate erasure locations and at least two syndromes of the codeword using a single-shot key equation solver to generate an error locator polynomial and an error evaluator polynomial. The generalized minimum distance decoder processes the least reliable candidate erasure locations first within the ordered list of candidate erasure locations.
摘要翻译：系统校正码字中的错误。该系统包括对码字中的符号的可靠性数量进行排序以创建候选擦除位置的有序列表的信道。该系统还包括广义最小距离解码器，其使用单次密钥方程求解器迭代地处理候选擦除位置的有序列表和码字的至少两个校验子，以生成错误定位器多项式和误差评估器多项式。广义最小距离解码器首先在候选擦除位置的有序列表中处理最不可靠的候选擦除位置。

66. 发明授权

US07193800B2 Data recording medium with servo pattern having pseudo-noise sequences 失效
标题翻译：具有伪噪声序列的伺服图案的数据记录介质
公开(公告)号：US07193800B2
公开(公告)日：2007-03-20
申请号：US10840819
申请日：2004-05-06
申请人： Jonathan Darrel Coker , David Timothy Flynn , Richard Leo Galbraith
发明人： Jonathan Darrel Coker , David Timothy Flynn , Richard Leo Galbraith
IPC分类号： G11B5/09
CPC分类号： G11B5/59633 , G11B5/59688
摘要： A data recording medium has tracks with pseudo-noise (PN) sequences with good autocorrelation properties as servo information for controlling the position of the recording head. A first set of alternating tracks uses a leading pseudo-random binary sequence (PRBS), which is a PN sequence with good autocorrelation properties, and a following PRBS that is cyclically shifted from the leading PRBS. A second set of alternating tracks interleaved with the first set also has a leading PRBS and a following PRBS that is cyclically shifted from the leading PRBS, but the leading PRBS in each of the tracks in the second set is offset along-the-track from the leading PRBS in the tracks of the first set. The head positioning control system uses the leading PRBS to generate a servo timing mark (STM), the cyclic shift to generate track identification (TID), and the following PRBS from adjacent tracks to generate the head position error signal (PES).
摘要翻译：数据记录介质具有具有良好自相关特性的伪噪声（PN）序列的轨迹，作为用于控制记录头位置的伺服信息。第一组交替轨道使用前导伪随机二进制序列（PRBS），其是具有良好自相关特性的PN序列，以及从前导PRBS循环移位的以下PRBS。与第一组交织的第二组交替轨迹还具有前导PRBS和从前导PRBS循环移位的后续PRBS，但是第二组中的每个轨道中的前导PRBS沿着轨迹偏移领先的PRBS在第一集的轨道。头部定位控制系统使用前导PRBS来产生伺服定时标记（STM），循环移位以产生轨迹识别（TID），以及来自相邻轨道的后续PRBS以产生头部位置误差信号（PES）。

67. 发明授权

US06879629B2 Method and apparatus for enhanced timing loop for a PRML data channel 有权
标题翻译： PRML数据通道增强定时循环的方法和装置
公开(公告)号：US06879629B2
公开(公告)日：2005-04-12
申请号：US09804094
申请日：2001-03-12
申请人： Richard Leo Galbraith , David James Stanek
发明人： Richard Leo Galbraith , David James Stanek
IPC分类号： G11B20/10 , H03H7/40
CPC分类号： G11B20/10055 , G11B20/10009
摘要： Methods and apparatus for enhanced timing loop are provided for a partial-response maximum-likelihood (PRML) data channel in a direct access storage device (DASD). An acquisition timing circuit for generating an acquisition timing signal includes a plurality of compare functions for receiving and comparing consecutive input signal samples on an interleave with a threshold value. The acquisition timing circuit includes a majority rule voting function coupled to the plurality of compare functions for selecting a timing interleave. Tracking timing circuitry for generating a timing error signal during a read operation includes a channel data detector. The channel data detector receives disk signal input samples and includes a multiple-state path memory. The tracking timing circuit includes a low latency detector receiving disk signal input samples. A selector function is coupled to an output of the low latency detector and is coupled to the multiple-state path memory for selecting a state. The selector function utilizes the low latency detector output and selects the state of the path memory. The selector function provides a low latency output corresponding to the selected state. The low latency output is used for generating the timing error signal during a read operation.
摘要翻译：为直接访问存储设备（DASD）中的部分响应最大似然（PRML）数据信道提供用于增强定时循环的方法和装置。用于产生获取定时信号的获取定时电路包括用于接收和比较交织上的连续输入信号样本与阈值的多个比较功能。获取定时电路包括耦合到多个比较功能的多数规则投票功能，用于选择定时交织。用于在读取操作期间产生定时误差信号的跟踪定时电路包括通道数据检测器。信道数据检测器接收盘信号输入样本并包括多状态路径存储器。跟踪定时电路包括接收盘信号输入样本的低延迟检测器。选择器功能耦合到低延迟检测器的输出，并且耦合到多状态路径存储器以选择状态。选择器功能使用低延迟检测器输出并选择路径存储器的状态。选择器功能提供对应于所选状态的低延迟输出。低延迟输出用于在读取操作期间产生定时误差信号。

68. 发明授权

US06583941B1 Method and apparatus for thermal asperity recovery for word sync detection in data channels 有权
标题翻译：用于数据通道中字同步检测的热粗糙度恢复的方法和装置
公开(公告)号：US06583941B1
公开(公告)日：2003-06-24
申请号：US09522111
申请日：2000-03-09
申请人： Jonathan Darrel Coker , Richard Leo Galbraith , Todd Carter Truax , Donald Earl Vosberg
发明人： Jonathan Darrel Coker , Richard Leo Galbraith , Todd Carter Truax , Donald Earl Vosberg
IPC分类号： G11B509
CPC分类号： G11B20/24 , G11B5/09 , G11B20/1403 , G11B27/3027 , G11B27/36 , G11B2220/20
摘要： A method and apparatus are provided for thermal asperity recovery for word sync detection in data channels. A word sync field contains a plurality of word sync patterns. A word sync detector receives a read signal of the word sync field. The word sync detector identifies a first subset of the plurality of word sync patterns and starts a customer data read. When the word sync detector fails to identify the first subset of the plurality of word sync patterns, the read signal of the word sync field is received again. Then the word sync detector identifies a second predefined subset of the plurality of word sync patterns and starts a customer data read. A single word sync field is used instead of the conventional dual word sync fields required for each sector. The second predefined subset of the plurality of word sync patterns is smaller than the first subset. For example, when the first subset is defined as 4 of 8, the second predefined subset is 2 of 8. For example, when the first subset is defined as 6 of 12, the second predefined subset is 2 of 12.
摘要翻译：提供了一种用于数据通道中的词同步检测的热凹凸恢复的方法和装置。字同步字段包含多个字同步模式。字同步检测器接收字同步字段的读信号。字同步检测器识别多个字同步模式的第一子集，并开始客户数据读取。当字同步检测器不能识别多个字同步模式的第一子集时，再次接收字同步字段的读信号。然后，字同步检测器识别多个字同步模式的第二预定义子集，并开始客户数据读取。使用单个字同步字段而不是每个扇区所需的常规双字同步字段。多个字同步模式的第二预定义子集小于第一子集。例如，当第一子集被定义为8的4时，第二预定义子集是8的第二子集。例如，当第一子集被定义为12的第6子集时，第二预定义子集是12。

69. 发明授权

US06104766A Noise predictive maximum likelihood (NPML) detection methods and apparatus based thereon 失效
标题翻译：基于此的噪声预测最大似然（NPML）检测方法和装置
公开(公告)号：US06104766A
公开(公告)日：2000-08-15
申请号：US715174
申请日：1996-09-17
申请人： Jonathan Darrel Coker , Evangelos Stavros Eleftheriou , Richard Leo Galbraith , Walter Hirt
发明人： Jonathan Darrel Coker , Evangelos Stavros Eleftheriou , Richard Leo Galbraith , Walter Hirt
IPC分类号： G11B20/18 , G11B20/10 , H03M13/23 , H04L25/08 , H04L25/497 , H03D1/00
CPC分类号： G11B20/10175 , G11B20/10009 , G11B20/10055 , H04L25/497
摘要： The invention is family of noise predictive maximum liklihood (NPML) symbol detectors that are particularly useful in direct access storage devices. Various embodiments representative of the family of detectors are described. In general, the NPML detectors include a sequence detector with imbedded feedback which may be preceded by a filter, e.g., a prediction error filter. The sequence of detectors, which may be Viterbi detectors, have an imbedded filter whose coefficients are determined by the convolution of the partial response (PR) or generalized PR function with the predictor coefficients and do not require multiplications and, thus, allows a simple RAM look-up for intersymbol-interference ISI cancelation. In one class of embodiments, the NPML detector comprises a prediction error filter of length N, cascaded with a sequence detector having 2.sup.K states, and a feedback filter imbedded in the sequence detector, having a length N+P-K, where P is length of the generalized PR shaping polynomial (P=2 yields PR4), and 0.ltoreq.K.ltoreq.N+P.
摘要翻译：本发明是在直接存取存储设备中特别有用的噪声预测最大似然（NPML）符号检测器系列。描述了代表检测器系列的各种实施例。通常，NPML检测器包括具有嵌入反馈的序列检测器，其可以在滤波器之前，例如预测误差滤波器。可以是维特比检测器的检测器序列具有嵌入式滤波器，其系数由部分响应（PR）或广义PR函数与预测器系数的卷积确定，并且不需要乘法，并且因此允许简单的RAM 查询符号间干扰ISI取消。在一类实施例中，NPML检测器包括长度为N的预测误差滤波器，与具有2K状态的序列检测器级联，以及嵌入在序列检测器中的反馈滤波器，其长度为N + PK，其中P为广义PR整形多项式（P = 2产生PR4），0

70. 发明授权

US6104188A Surface analysis test defect detector for direct access storage device 有权
标题翻译：用于直接存取存储设备的表面分析测试缺陷检测器
公开(公告)号：US6104188A
公开(公告)日：2000-08-15
申请号：US170419
申请日：1998-10-13
申请人： Jonathan Darrel Coker , Steven Michael Currie , Richard Leo Galbraith , Donald Earl Vosberg
发明人： Jonathan Darrel Coker , Steven Michael Currie , Richard Leo Galbraith , Donald Earl Vosberg
IPC分类号： G01R33/12 , G11B20/18 , G11B27/36 , G11B33/10 , G01N27/82
CPC分类号： G11B20/10055 , G01R33/1207 , G11B20/1816 , G11B20/1883 , G11B27/36 , G11B2220/20 , G11B33/10
摘要： A method and apparatus are provided for detecting surface defects in a direct access storage device. Disk data readback sample values are converted to gain error values based upon an identified difference from predefined ideal data values. An error signal accumulator accumulates a summed value of error signals for a current sample and a predetermined number of past samples. Each sequential accumulator summed value is compared with a predetermined threshold value. An error output is generated responsive to each sequential accumulator summed value greater than or equal to the predetermined threshold value, the error output identifying the disk surface defect.
摘要翻译：提供一种用于检测直接存取存储装置中的表面缺陷的方法和装置。基于与预定理想数据值的识别差异，磁盘数据回读采样值被转换为增益误差值。误差信号累加器累积当前样本和预定数量的过去采样的误差信号的相加值。将每个顺序累加器求和值与预定阈值进行比较。响应于大于或等于预定阈值的每个顺序累加器求和值产生错误输出，该错误输出识别盘表面缺陷。

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