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31. 发明授权

US09064594B2 Methods and apparatus for soft data generation for memory devices based on performance factor adjustment 有权
标题翻译：基于性能因素调整的存储器件软数据生成方法和装置
公开(公告)号：US09064594B2
公开(公告)日：2015-06-23
申请号：US13063874
申请日：2009-09-30
申请人： Erich F. Haratsch , Johnson Yen
发明人： Erich F. Haratsch , Johnson Yen
IPC分类号： G11C16/26 , G11C7/02 , G11C7/04 , G11C16/34 , G11C11/56 , G06F12/00 , G06F11/10 , G06F12/02 , G11C16/04
CPC分类号： G11C16/26 , G06F11/1012 , G06F11/1068 , G06F12/0246 , G06F2212/1032 , G06F2212/2022 , G11C7/02 , G11C7/04 , G11C11/16 , G11C11/5642 , G11C16/0483 , G11C16/3418 , G11C2211/5634
摘要： Methods and apparatus are provided for soft data generation for memory devices based on a performance factor adjustment. At least one soft data value is generated for a memory device, such as a flash memory device, by obtaining at least one read value; and generating the soft data value based on the obtained at least one read value and an adjustment based on one or more performance factors of the memory device. The read values may be soft data or hard data. Possible performance factors include endurance, number of read cycles, retention time, temperature, process corner, inter-cell interference impact, location and a pattern of aggressor cells. One or more pattern-dependent and/or location-specific performance factors may also be considered. The generated soft data value may be a soft read value used to generate one or more log likelihood ratios or may be the log likelihood ratios themselves.
摘要翻译：提供了基于性能因素调整的用于存储器件的软数据生成的方法和装置。通过获得至少一个读取值，为诸如闪存设备的存储设备生成至少一个软数据值; 以及基于所获得的至少一个读取值和基于所述存储器件的一个或多个性能因素的调整来产生所述软数据值。读取的值可以是软数据或硬数据。可能的性能因素包括耐力，读取周期数，保留时间，温度，过程角，细胞间干扰影响，位置和侵略细胞的模式。还可以考虑一个或多个模式相关和/或位置特定的性能因素。产生的软数据值可以是用于产生一个或多个对数似然比的软读取值，或者可以是对数似然比本身。

32. 发明申请

US20110167305A1 Methods and Apparatus for Soft Data Generation for Memory Devices Based on Performance Factor Adjustment 有权
标题翻译：基于性能因素调整的存储器件软数据生成方法与装置
公开(公告)号：US20110167305A1
公开(公告)日：2011-07-07
申请号：US13063874
申请日：2009-09-30
申请人： Erich F. Haratsch , Johnson Yen
发明人： Erich F. Haratsch , Johnson Yen
IPC分类号： G06F11/00
CPC分类号： G11C16/26 , G06F11/1012 , G06F11/1068 , G06F12/0246 , G06F2212/1032 , G06F2212/2022 , G11C7/02 , G11C7/04 , G11C11/16 , G11C11/5642 , G11C16/0483 , G11C16/3418 , G11C2211/5634
摘要： Methods and apparatus are provided for soft data generation for memory devices based on a performance factor adjustment. At least one soft data value is generated for a memory device, by obtaining at least one read value; and generating the soft data value based on the obtained at least one read value and an adjustment based on one or more performance factors of the memory device. The read values may comprise, for example, data bits, voltage levels, current levels or resistance levels. The read values may be soft data or hard data. The possible performance factors include endurance, number of read cycles, retention time, temperature, process corner, inter-cell interference impact, location within the memory array and a pattern of aggressor cells. One or more pattern-dependent performance factors and/pr location-specific performance factors may also be considered. The generated soft data value may be a soft read value that is used to generate one or more log likelihood ratios, or may be the log likelihood ratios themselves.
摘要翻译：提供了基于性能因素调整的用于存储器件的软数据生成的方法和装置。通过获得至少一个读取值，为存储器件生成至少一个软数据值; 以及基于所获得的至少一个读取值和基于所述存储器件的一个或多个性能因素的调整来产生所述软数据值。读取值可以包括例如数据位，电压电平，电流电平或电阻电平。读取的值可以是软数据或硬数据。可能的性能因素包括耐久性，读取周期数，保留时间，温度，过程角，单元间干扰影响，存储器阵列内的位置和侵略者单元的模式。还可以考虑一个或多个模式相关的性能因素和/或位置特定的性能因素。生成的软数据值可以是用于生成一个或多个对数似然比的软读取值，或者可以是对数似然比本身。

33. 发明授权

US08873177B2 Hardware-based methods and apparatus for inter-track interference mitigation in magnetic recording systems 有权
标题翻译：用于磁记录系统中的轨道间干扰减轻的基于硬件的方法和装置
公开(公告)号：US08873177B2
公开(公告)日：2014-10-28
申请号：US13250246
申请日：2011-09-30
申请人： Kurt J. Worrell , Erich F. Haratsch , Changyou Xu , Jefferson E. Singleton , Kripa Venkatachalam , David G. Springberg
发明人： Kurt J. Worrell , Erich F. Haratsch , Changyou Xu , Jefferson E. Singleton , Kripa Venkatachalam , David G. Springberg
IPC分类号： G11B5/09 , G11B5/012 , G11B19/04
CPC分类号： G11B5/09 , G11B5/012 , G11B19/045
摘要： Hardware-based methods and apparatus are provided for inter-track interference mitigation in magnetic recording systems. Inter-track interference (ITI) is mitigated in a magnetic recording system by obtaining ITI cancellation data; and providing the ITI cancellation data to an ITI mitigation circuit using a write data path in the magnetic recording system. The write data path can optionally operate substantially simultaneously with the read data path performing the read operation. The ITI cancellation data comprises, for example, user data and/or media data.
摘要翻译：提供基于硬件的方法和装置用于磁记录系统中的轨道间干扰减轻。通过获取ITI取消数据，在磁记录系统中减轻了轨道间干扰（ITI）。以及使用磁记录系统中的写数据路径将ITI消除数据提供给ITI缓解电路。写入数据路径可以可选地与执行读取操作的读取数据路径同时操作。 ITI取消数据例如包括用户数据和/或媒体数据。

34. 再颁专利

USRE44614E1 Reliability unit for determining a reliability value for at least one bit decision 有权
标题翻译：用于确定至少一个位决定的可靠性值的可靠性单元
公开(公告)号：USRE44614E1
公开(公告)日：2013-11-26
申请号：US13530573
申请日：2012-06-22
申请人： Kelly K. Fitzpatrick , Erich F. Haratsch
发明人： Kelly K. Fitzpatrick , Erich F. Haratsch
IPC分类号： H03M13/00
CPC分类号： H03M13/4192 , H03M13/395 , H03M13/4153
摘要： A reliability unit is provided for determining a reliability value for at least one bit decision. The disclosed reliability unit comprises one or more functional elements, wherein each of the functional elements comprises at least four functional units and at least two registers, wherein each functional unit comprises a comparator and a multiplexer, and wherein an output of the comparator and an equivalence bit control the multiplexer. Generally, the reliability unit determines a reliability value for a bit decision associated with a maximum-likelihood path through a multiple-step trellis.
摘要翻译：提供了用于确定至少一个位决定的可靠性值的可靠性单元。所公开的可靠性单元包括一个或多个功能元件，其中每个功能元件包括至少四个功能单元和至少两个寄存器，其中每个功能单元包括比较器和多路复用器，并且其中比较器的输出和等效位控制多路复用器。通常，可靠性单元确定与通过多步网格的最大似然路径相关联的位决定的可靠性值。

35. 发明申请

US20130051211A1 Read Channel With Oversampled Analog To Digital Conversion 有权
标题翻译：读取通道，采用过采样模数转换
公开(公告)号：US20130051211A1
公开(公告)日：2013-02-28
申请号：US13215803
申请日：2011-08-23
申请人： James A. Bailey , Nayak Ratnakar Aravind , Erich F. Haratsch
发明人： James A. Bailey , Nayak Ratnakar Aravind , Erich F. Haratsch
IPC分类号： G11B5/027
CPC分类号： G11B20/10009
摘要： Methods and apparatus are provided for processing a signal in a read channel using an oversampled analog to digital conversion. An oversampled analog to digital conversion is performed on an analog input signal to generate a plurality of digital samples corresponding to the analog input signal for a given bit interval. A data detection algorithm can then be applied on one or more of the digital samples to obtain a detected output. The oversampled analog to digital conversion simplifies the analog design by transferring at least a portion of the equalization and/or filtering processes to the digital domain.
摘要翻译：提供了用于使用过采样的模数转换处理读通道中的信号的方法和装置。在模拟输入信号上执行过采样的模数转换，以在给定的位间隔上产生对应于模拟输入信号的多个数字采样。然后可以将数据检测算法应用于一个或多个数字样本以获得检测到的输出。过采样模数转换通过将至少一部分均衡和/或滤波处理转移到数字域来简化了模拟设计。

36. 发明申请

US20130050004A1 Read Channel With Selective Oversampled Analog To Digital Conversion 有权
标题翻译：读取通道与选择性过采样模数转换
公开(公告)号：US20130050004A1
公开(公告)日：2013-02-28
申请号：US13215806
申请日：2011-08-23
申请人： James A. Bailey , Nayak Ratnakar Aravind , Robert H. Leonowich , Erich F. Haratsch
发明人： James A. Bailey , Nayak Ratnakar Aravind , Robert H. Leonowich , Erich F. Haratsch
IPC分类号： H03M1/12
CPC分类号： G11B20/10037 , G11B20/10027 , G11B20/10046 , G11B20/22 , G11B20/24 , G11B2220/2516
摘要： Methods and apparatus are provided for processing a signal in a read channel using a selective oversampled analog to digital conversion. The disclosed selective oversampled analog to digital conversion simplifies the analog design by transferring at least a portion of the equalization and/or filtering processes to the digital domain. An analog input signal in a read channel is converted to a digital signal to generate one or more digital samples corresponding to the analog input signal for a given bit interval. The analog input signal is selectively filtered in an analog domain in a first mode and the digital samples are selectively filtered in a digital domain in a second mode. A data detection algorithm is applied to the digital samples to obtain a detected output. The selection of the first mode and the second mode can be, for example, based on channel conditions. The analog to digital conversion can be performed at a baud rate in the first mode and at an oversampled rate in the second mode.
摘要翻译：提供了用于使用选择性过采样模数转换处理读通道中的信号的方法和装置。所公开的选择性过采样模数转换通过将均衡和/或滤波处理的至少一部分转移到数字域来简化了模拟设计。读取通道中的模拟输入信号被转换为数字信号，以在给定位间隔内产生对应于模拟输入信号的一个或多个数字采样。模拟输入信号在第一模式中以模拟域中选择性滤波，并且在第二模式中数字采样在数字域中有选择地滤波。将数据检测算法应用于数字样本以获得检测到的输出。第一模式和第二模式的选择可以是例如基于信道条件。模数转换可以在第一模式下的波特率和第二模式中的过采样速率下执行。

37. 发明授权

US08250438B2 Method and apparatus for iterative error-erasure decoding 有权
标题翻译：用于迭代误码解码的方法和装置
公开(公告)号：US08250438B2
公开(公告)日：2012-08-21
申请号：US12533432
申请日：2009-07-31
申请人： Erich F. Haratsch
发明人： Erich F. Haratsch
IPC分类号： G11C29/00 , H03M13/00
CPC分类号： H03M13/455 , H03M13/154
摘要： Methods and apparatus are provided for improved iterative error-erasure decoding. A signal is decoded by obtaining a plurality of symbols associated with the signal and one or more corresponding reliability values; generating at least one erasure list comprised of L symbols and at least one shortened erasure list comprised of L′ symbols, where L′ is less than L; and constructing an erasure set by taking erasures from at least one of the erasure list and the shortened erasure list. A signal is also processed by generating one or more reliability values using a soft-output detector; generating an erasure list of symbols by comparing the reliability values to at least one reliability threshold value (or by sorting); and performing error erasure decoding using the erasure list. The size of the erasure list can optionally be adjusted using feedback information.
摘要翻译：提供了改进的迭代误差解码方法和装置。通过获得与该信号相关联的多个符号和一个或多个相应的可靠性值来解码信号; 生成由L个符号构成的至少一个擦除列表和由L'个符号组成的至少一个缩短的擦除列表，其中L'小于L; 以及通过从所述擦除列表和所述缩短删除列表中的至少一个进行擦除来构造擦除集合。还通过使用软输出检测器产生一个或多个可靠性值来处理信号; 通过将可靠性值与至少一个可靠性阈值（或通过排序）进行比较来生成符号擦除列表; 并使用擦除列表执行错误擦除解码。可以选择使用反馈信息来调整擦除列表的大小。

38. 发明申请

US20080168330A1 SYSTEMS AND METHODS FOR PRIORITIZING ERROR CORRECTION DATA 有权
标题翻译：用于优化错误校正数据的系统和方法
公开(公告)号：US20080168330A1
公开(公告)日：2008-07-10
申请号：US11620988
申请日：2007-01-08
申请人： Nils Graef , Erich F. Haratsch
发明人： Nils Graef , Erich F. Haratsch
IPC分类号： G06F11/16 , H03M13/41 , H03M13/45 , G11C29/00
CPC分类号： G11B20/18 , H03M13/4146
摘要： Various systems and methods for generating and/or ordering error indications are disclosed herein. In some cases, the error indication is used as an erasure pointer in a memory access system. As one particular example, a system for ordering erasure pointers is disclosed that includes a group of N sort cells, where N is a whole number. Each of the sort cells is operable to maintain a respective error indication that includes an error value and an associated error pointer. Further, the group of N sort cells is operable to receive an incoming error indication including error value and associated error pointer, and to update the error indication of one or more of the group of N sort cells based in part on the incoming error value. The system also includes a selector circuit that is operable to allow selectable access to each of the respective error pointers maintained in the group of N sort cells.
摘要翻译：本文公开了用于产生和/或排序错误指示的各种系统和方法。在某些情况下，错误指示用作存储器访问系统中的擦除指针。作为一个具体示例，公开了一种用于排序擦除指针的系统，其包括一组N个分类单元，其中N是整数。每个分类单元可操作以维持包括错误值和相关联的错误指针的相应错误指示。此外，N个分组单元的组可操作以接收包括错误值和相关联的错误指针的输入错误指示，并且部分地基于输入错误值来更新该N个分类单元组中的一个或多个的错误指示。该系统还包括选择器电路，其可操作以允许对维持在N个分类单元组中的每个相应错误指针的可选择访问。

39. 发明申请

US20080077829A1 Systems and Methods for Generating Erasure Flags 有权
标题翻译：用于生成擦除标志的系统和方法
公开(公告)号：US20080077829A1
公开(公告)日：2008-03-27
申请号：US11535540
申请日：2006-09-27
申请人： Nils Graef , Erich F. Haratsch
发明人： Nils Graef , Erich F. Haratsch
IPC分类号： G11C29/00
CPC分类号： G11C7/1006 , G11C7/1051 , G11C7/1063 , G11C2029/0411
摘要： Various systems and methods for generating error indications are disclosed herein. In some cases, the error indication is used as an erasure pointer in a memory access system. As one particular example, a system for generating an erasure pointer is disclosed that includes accumulating a number of error values into an overall error value, and comparing the overall error value to an error threshold. When the overall error value exceeds the error threshold, an erasure pointer is generated. In one particular case, the error values are derived from a look up table using thermometer codes generated by an analog to digital converter. In other cases, the error values are derived from comparing a soft output with a reliability threshold.
摘要翻译：本文公开了用于产生误差指示的各种系统和方法。在某些情况下，错误指示用作存储器访问系统中的擦除指针。作为一个具体示例，公开了一种用于生成擦除指针的系统，其包括将多个错误值累积到总体错误值中，并将整体误差值与错误阈值进行比较。当总体错误值超过错误阈值时，产生擦除指针。在一个特定情况下，使用由模数转换器产生的温度计代码从查找表中导出误差值。在其他情况下，误差值是通过将软输出与可靠性阈值进行比较得出的。

40. 发明授权

US08874633B2 Determining coefficients for digital low pass filter given cutoff and boost values for corresponding analog version 有权
标题翻译：确定数字低通滤波器的系数，给出相应模拟版本的截止值和升压值
公开(公告)号：US08874633B2
公开(公告)日：2014-10-28
申请号：US13215810
申请日：2011-08-23
申请人： Nayak Ratnakar Aravind , Erich F. Haratsch
发明人： Nayak Ratnakar Aravind , Erich F. Haratsch
IPC分类号： G06F17/10 , H03H17/02 , H03H17/04 , H03H17/06 , G11B20/10
CPC分类号： H03H17/0294 , G11B20/10018 , G11B20/10027 , G11B20/10046 , G11B2220/2508 , H03H17/04 , H03H17/0685
摘要： Methods and apparatus are provided for determining coefficients for a digital low pass filter, given cutoff and boost values for a corresponding analog version of the digital low pass filter. Coefficients are determined for a digital low pass filter by obtaining cutoff and boost values for a corresponding analog version of the digital low pass filter; and determining the coefficients for the digital low pass filter based on the obtained cutoff and boost values. The coefficients can be determined, for example, by generating a transfer function, H(s), for the corresponding analog version using the obtained cutoff and boost values: transforming the transfer function, H(s), to a frequency domain characterization, H(z), using one or more bilinear transforms to obtain a plurality of coefficients for an infinite impulse response (IIR) filter; generating the IIR filter using the plurality of coefficients for the IIR filter; and applying an impulse to the IIR filter to obtain the one or more coefficients for the digital low pass filter. In another variation, the coefficients are pre-computed and obtained from a look-up table.
摘要翻译：提供了用于确定用于数字低通滤波器的相应模拟版本的数字低通滤波器的给定截止值和升压值的系数的方法和装置。通过获得数字低通滤波器的相应模拟版本的截止值和升压值，为数字低通滤波器确定系数; 以及基于所获得的截止和升压值来确定数字低通滤波器的系数。可以例如通过使用获得的截止值和升压值为相应模拟版本生成传递函数H（s）来确定系数：将传递函数H（s）转换为频域表征，H （z），使用一个或多个双线性变换来获得用于无限脉冲响应（IIR）滤波器的多个系数; 使用所述IIR滤波器的所述多个系数产生所述IIR滤波器; 并向IIR滤波器施加脉冲以获得用于数字低通滤波器的一个或多个系数。在另一个变体中，系数被预先计算并从查找表中获得。

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