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公开(公告)号：US07724844B2
公开(公告)日：2010-05-25
申请号：US11700340
申请日：2007-01-31
申请人： Mehmet F. Erden , Richard L. Keizer
发明人： Mehmet F. Erden , Richard L. Keizer
IPC分类号： H04L27/06
CPC分类号： G11B5/59688
摘要： A servo system for detecting and demodulating servo data is disclosed. In illustrated aspects, a demodulation circuit or portion includes a correlator component configured to output a correlation of a sequence of equalized channel samples with a sequence of correlator weight derived based on at least one mapped channel sequence. A decision component, for example a threshold detector uses the correlation results to output a data bit symbol based upon the correlation of the sequence of equalized channel samples to the at least one mapped channel sequence.
摘要翻译： 公开了一种用于检测和解调伺服数据的伺服系统。 在所示方面中，解调电路或部分包括相关器组件，其被配置为输出均衡信道样本序列与基于至少一个映射信道序列导出的相关器权重序列的相关性。 决策分量，例如阈值检测器使用相关结果，以基于均衡信道样本序列与至少一个映射信道序列的相关性来输出数据比特符号。
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公开(公告)号：US20080180825A1
公开(公告)日：2008-07-31
申请号：US11700340
申请日：2007-01-31
申请人： Mehmet F. Erden , Richard L. Keizer
发明人： Mehmet F. Erden , Richard L. Keizer
CPC分类号： G11B5/59688
摘要： A servo system for detecting and demodulating servo data is disclosed. In illustrated aspects, a demodulation circuit or portion includes a correlator component configured to output a correlation of a sequence of equalized channel samples with a sequence of correlator weight derived based on at least one mapped channel sequence. A decision component, for example a threshold detector uses the correlation results to output a data bit symbol based upon the correlation of the sequence of equalized channel samples to the at least one mapped channel sequence.
摘要翻译： 公开了一种用于检测和解调伺服数据的伺服系统。 在所示方面中，解调电路或部分包括相关器组件，其被配置为输出均衡信道样本序列与基于至少一个映射信道序列导出的相关器权重序列的相关性。 决策分量，例如阈值检测器使用相关结果，以基于均衡信道样本序列与至少一个映射信道序列的相关性来输出数据比特符号。
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公开(公告)号：US07889823B2
公开(公告)日：2011-02-15
申请号：US11070917
申请日：2005-03-03
申请人： Xueshi Yang , Mehmet F. Erden , Erozan M. Kurtas
发明人： Xueshi Yang , Mehmet F. Erden , Erozan M. Kurtas
IPC分类号： H04B1/10
CPC分类号： H04L7/0054 , G11B20/10009 , G11B20/10037 , G11B20/1403 , H04L7/0029 , H04L7/0062
摘要： A parallel channel timing recovery circuit. The parallel timing recovery circuit comprises multiple prefilters receiving parallel channel outputs and providing prefilter outputs. Multiple sampling filters receive the prefilter outputs and provide multiple discrete time signal samples. A self-timing circuit has multiple inputs receiving the multiple discrete time signal samples. The self-timing circuit provides a sampling control output to the sampling filters. The sampling control output is based on a composite of the multiple discrete time signal samples. Each of the sampling filters generates a discrete time signal sample based on the sampling control output and the prefilter outputs.
摘要翻译： 并行通道定时恢复电路。 并行定时恢复电路包括多个预滤波器，其接收并行通道输出并提供预滤波器输出。 多个采样滤波器接收预滤波器输出并提供多个离散时间信号采样。 自定时电路具有接收多个离散时间信号样本的多个输入。 自定时电路为采样滤波器提供采样控制输出。 采样控制输出基于多个离散时间信号样本的复合。 每个采样滤波器基于采样控制输出和预滤波器输出产生离散时间信号采样。
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公开(公告)号：US07835099B2
公开(公告)日：2010-11-16
申请号：US11824221
申请日：2007-06-29
IPC分类号： G11B5/09
CPC分类号： G11B20/1879 , B82Y10/00 , G11B5/743 , G11B20/18 , G11B20/1833 , G11B27/36 , G11B2020/10759 , G11B2020/10796 , G11B2020/1836 , G11B2220/252
摘要： A disc drive system provides increased reliability by detecting and correcting errors associated with bit-patterned media. Write synchronization errors associated with bit-patterned media are addressed by including data storage for temporarily storing data that is being written to the disc drive. The data is read from both the disc drive and the storage medium and compared to detect write synchronization errors. A disc drive system for correcting write synchronization errors includes an encoder, non-volatile storage, and decoder device for implementing a parity-based scheme for increased reliability. Data strings being written to the disc drive are combined in an encoder to generate a parity string. The address of the data being written to the disc drive, along with the updated parity string is stored to the non-volatile storage. The data strings are read from the disc drive by the decoder. If uncorrectable errors are identified, the decoder employs the parity string in conjunction with the other data strings written to the disc drive to reconstruct the data string with uncorrectable errors.
摘要翻译： 磁盘驱动器系统通过检测和校正与位图形介质相关的错误来提供增加的可靠性。 与位图形介质相关联的写入同步错误通过包括临时存储要写入磁盘驱动器的数据的数据存储来解决。 数据从磁盘驱动器和存储介质读取，并进行比较以检测写同步错误。 用于校正写同步错误的盘驱动系统包括用于实现基于奇偶校验的方案以提高可靠性的编码器，非易失性存储器和解码器装置。 被写入盘驱动器的数据串被组合在编码器中以产生奇偶校验串。 被写入到磁盘驱动器的数据的地址以及更新的奇偶校验字符串被存储到非易失性存储器中。 数据串由解码器从盘驱动器读取。 如果识别出不可校正的错误，则解码器将奇偶校验码串与写入盘驱动器的其他数据串结合使用不可校正的错误重建数据串。
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公开(公告)号：US07265937B1
公开(公告)日：2007-09-04
申请号：US11450208
申请日：2006-06-09
IPC分类号： G11B5/596
CPC分类号： G11B5/59605 , G11B5/59688
摘要： A data storage system in which multiple readback signals are resolved is provided. The data storage system includes a data storage medium configured to store servo marks and data marks. The data storage medium has tracks that are divided into sectors. An array of heads is configured to interact with the data storage medium. A demodulation circuit receives servo signals obtained by at least some heads of the array of heads and computes a resultant servo signal, which is used to adjust a position of the array of heads over the storage medium.
摘要翻译： 提供多个回读信号被解析的数据存储系统。 数据存储系统包括配置为存储伺服标记和数据标记的数据存储介质。 数据存储介质具有被划分成扇区的轨迹。 头阵列被配置为与数据存储介质交互。 解调电路接收由头阵列的至少一些头部获得的伺服信号，并计算合成的伺服信号，该伺服信号用于调整存储介质上的头阵列的位置。
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公开(公告)号：US20090003144A1
公开(公告)日：2009-01-01
申请号：US11824221
申请日：2007-06-29
IPC分类号： G11B7/085
CPC分类号： G11B20/1879 , B82Y10/00 , G11B5/743 , G11B20/18 , G11B20/1833 , G11B27/36 , G11B2020/10759 , G11B2020/10796 , G11B2020/1836 , G11B2220/252
摘要： A disc drive system provides increased reliability by detecting and correcting errors associated with bit-patterned media. Write synchronization errors associated with bit-patterned media are addressed by including data storage for temporarily storing data that is being written to the disc drive. The data is read from both the disc drive and the storage medium and compared to detect write synchronization errors. A disc drive system for correcting write synchronization errors includes an encoder, non-volatile storage, and decoder device for implementing a parity-based scheme for increased reliability. Data strings being written to the disc drive are combined in an encoder to generate a parity string. The address of the data being written to the disc drive, along with the updated parity string is stored to the non-volatile storage. The data strings are read from the disc drive by the decoder. If uncorrectable errors are identified, the decoder employs the parity string in conjunction with the other data strings written to the disc drive to reconstruct the data string with uncorrectable errors.
摘要翻译： 磁盘驱动器系统通过检测和校正与位图形介质相关的错误来提供增加的可靠性。 与位图形介质相关联的写入同步错误通过包括临时存储要写入磁盘驱动器的数据的数据存储来解决。 数据从磁盘驱动器和存储介质读取，并进行比较以检测写同步错误。 用于校正写同步错误的盘驱动系统包括用于实现基于奇偶校验的方案以提高可靠性的编码器，非易失性存储器和解码器装置。 写入盘驱动器的数据串被组合在编码器中以产生奇偶校验串。 被写入到磁盘驱动器的数据的地址以及更新的奇偶校验字符串被存储到非易失性存储器中。 数据串由解码器从盘驱动器读取。 如果识别出不可校正的错误，则解码器将奇偶校验码串与写入盘驱动器的其他数据串结合使用不可校正的错误重建数据串。
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公开(公告)号：US06754015B2
公开(公告)日：2004-06-22
申请号：US10224825
申请日：2002-08-21
申请人： Mehmet F. Erden , Erozan M. Kurtas
发明人： Mehmet F. Erden , Erozan M. Kurtas
IPC分类号： G11B502
CPC分类号： G11B5/012 , G11B5/02 , G11B5/09 , G11B5/6076 , G11B2005/001 , G11B2005/0016
摘要： A disc drive data recovery system for recovering data from a magnetic disc having asperities provided. Readback data follows a nominal readback path and a thermal asperity cancellation readback path. A thermal asperity detector detects a thermal asperity in the readback signal and responsively selects the readback signal which follows the thermal asperity cancellation readback path.
摘要翻译： 一种用于从具有凹凸的磁盘中恢复数据的盘驱动器数据恢复系统。 回读数据遵循标称回读路径和热绝对消除回读路径。 热敏不均匀检测器检测回读信号中的热不均匀性，并响应于选择跟随热绝对消除回读路径的回读信号。
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公开(公告)号：US08331051B2
公开(公告)日：2012-12-11
申请号：US12904912
申请日：2010-10-14
IPC分类号： G11B5/09
CPC分类号： G11B20/1879 , B82Y10/00 , G11B5/743 , G11B20/18 , G11B20/1833 , G11B27/36 , G11B2020/10759 , G11B2020/10796 , G11B2020/1836 , G11B2220/252
摘要： A disc drive system provides increased reliability by detecting and correcting errors associated with bit-patterned media. Write synchronization errors associated with bit-patterned media are addressed by including data storage for temporarily storing data that is being written to the disc drive. The data is read from both the disc drive and the storage medium and compared to detect write synchronization errors. The disc drive system utilizes the identified write synchronization errors for at least one of timing recovery, equalizer training detection, error correction code application, and error recovery.
摘要翻译： 磁盘驱动器系统通过检测和校正与位图形介质相关的错误来提供增加的可靠性。 与位图形介质相关联的写入同步错误通过包括临时存储要写入磁盘驱动器的数据的数据存储来解决。 数据从磁盘驱动器和存储介质读取，并进行比较以检测写同步错误。 磁盘驱动器系统利用所识别的写同步错误，用于定时恢复，均衡器训练检测，纠错码应用和错误恢复中的至少一个。
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公开(公告)号：US20110249355A1
公开(公告)日：2011-10-13
申请号：US12904912
申请日：2010-10-14
CPC分类号： G11B20/1879 , B82Y10/00 , G11B5/743 , G11B20/18 , G11B20/1833 , G11B27/36 , G11B2020/10759 , G11B2020/10796 , G11B2020/1836 , G11B2220/252
摘要： A disc drive system provides increased reliability by detecting and correcting errors associated with bit-patterned media. Write synchronization errors associated with bit-patterned media are addressed by including data storage for temporarily storing data that is being written to the disc drive. The data is read from both the disc drive and the storage medium and compared to detect write synchronization errors. The disc drive system utilizes the identified write synchronization errors for at least one of timing recovery, equalizer training detection, error correction code application, and error recovery.
摘要翻译： 磁盘驱动器系统通过检测和校正与位图形介质相关的错误来提供增加的可靠性。 与位图形介质相关联的写入同步错误通过包括临时存储要写入磁盘驱动器的数据的数据存储来解决。 数据从磁盘驱动器和存储介质读取，并进行比较以检测写同步错误。 磁盘驱动器系统利用所识别的写同步错误，用于定时恢复，均衡器训练检测，纠错码应用和错误恢复中的至少一个。
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