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    Dynamically adapting a magnetic tape read channel equalizer
    4.
    发明授权
    Dynamically adapting a magnetic tape read channel equalizer 失效
    动态调整磁带读通道均衡器

    公开(公告)号：US07271971B2

    公开(公告)日：2007-09-18

    申请号：US11003283

    申请日：2004-12-03

    申请人： Robert Allen Hutchins ,  Glen Alan Jaquette ,  Evangelos S. Eleftheriou ,  Sedat Oelcer

    发明人： Robert Allen Hutchins ,  Glen Alan Jaquette ,  Evangelos S. Eleftheriou ,  Sedat Oelcer

    IPC分类号： G11B5/035

    CPC分类号： G11B20/10 ,  G11B5/02

    摘要： A read channel equalizer of a magnetic tape drive which equalizes digitally sampled magnetic signals detected by a read head is dynamically adapted. A detector of equalizer dynamic adaptation logic compares equalizer output signals to desired values that are based on the decoding scheme (such as +2, 0 and −2 for PR4) to sense equalizer output signals that are offset from at least one desired value, and signals the fact of each offset and its polarity as amplitude independent error signals. The signaled sensed amplitude independent error signals are fed back to adjustable taps of the equalizer. The simplified error signals thus avoid complex calculations of waveform errors, such as least mean square calculations. The error signals may be weighted and may be adjusted to align synchronously provided error signals with asynchronous taps of the equalizer.

    摘要翻译： 磁头驱动器的读取通道均衡器，其均衡由读取头检测到的数字采样磁信号。 均衡器动态适配逻辑的检测器将均衡器输出信号与基于解码方案（例如PR4的+2,0和-2）的期望值进行比较，以感测与至少一个期望值偏移的均衡器输出信号，以及 将每个偏移及其极性的事实表示为与振幅无关的误差信号。 信号感知的与振幅无关的误差信号反馈到均衡器的可调节抽头。 因此，简化的误差信号避免了波形误差的复杂计算，例如最小均方根计算。 误差信号可以被加权并且可以被调整以使同步提供的误差信号与均衡器的异步抽头对齐。

    Apparatus, system, and method for mitigating signal asymmetry
    5.
    发明授权
    Apparatus, system, and method for mitigating signal asymmetry 失效
    用于减轻信号不对称的装置，系统和方法

    公开(公告)号：US07106533B2

    公开(公告)日：2006-09-12

    申请号：US10966531

    申请日：2004-10-15

    申请人： Evangelos S. Eleftheriou ,  Ernest Stewart Gale ,  Robert Allen Hutchins ,  Glen Alan Jaquette ,  Sedat Oelcer

    发明人： Evangelos S. Eleftheriou ,  Ernest Stewart Gale ,  Robert Allen Hutchins ,  Glen Alan Jaquette ,  Sedat Oelcer

    IPC分类号： G11B20/10

    CPC分类号： H03M1/1042 ,  G11B20/10 ,  G11B2220/90

    摘要： An apparatus, system, and method are disclosed for mitigating signal asymmetry. An analog to digital converter samples an analog signal from a read head and converts the sample to a digital input signal. The digital input signal addresses a look-up module, and the look-up module outputs a modified digital signal. The modified digital signal value is a specified function of the digital input signal value, wherein the specified function is configured to mitigate the asymmetry of the digital input signal. The modified digital signal value may be periodically recalculated to adjust for read head wear.

    摘要翻译： 公开了一种减轻信号不对称性的装置，系统和方法。 模数转换器从读取头采样模拟信号，并将样本转换为数字输入信号。 数字输入信号寻址查找模块，查找模块输出修改后的数字信号。 修改的数字信号值是数字输入信号值的指定函数，其中指定的功能被配置为减轻数字输入信号的不对称性。 可以周期性地重新计算修改的数字信号值以调整读头磨损。

    Dynamically adapting a magnetic tape read channel equalizer
    6.
    发明授权
    Dynamically adapting a magnetic tape read channel equalizer 失效
    动态调整磁带读通道均衡器

    公开(公告)号：US07359135B2

    公开(公告)日：2008-04-15

    申请号：US11733934

    申请日：2007-04-11

    申请人： Robert Allen Hutchins ,  Glen Alan Jaquette ,  Evangelos S. Eleftheriou ,  Sedat Oelcer

    发明人： Robert Allen Hutchins ,  Glen Alan Jaquette ,  Evangelos S. Eleftheriou ,  Sedat Oelcer

    IPC分类号： G11B5/35

    CPC分类号： G11B20/10 ,  G11B5/02

    摘要： A read channel equalizer of a magnetic tape drive which equalizes digitally sampled magnetic signals detected by a read head is dynamically adapted. A detector of equalizer dynamic adaptation logic compares equalizer output signals to desired values that are based on the decoding scheme (such as +2, 0 and −2 for PR4) to sense equalizer output signals that are offset from at least one desired value, and signals the fact of each offset and it polarity as amplitude independent error signals. The signaled sensed amplitude independent error signals are fed back to adjustable taps of the equalizer. The simplified error signals thus avoid complex calculations of waveform errors, such as least mean square calculations. The error signals may be weighted and may be adjusted to align synchronously provided error signals with asynchronous taps of the equalizer.

    摘要翻译： 磁头驱动器的读取通道均衡器，其均衡由读取头检测到的数字采样磁信号。 均衡器动态适配逻辑的检测器将均衡器输出信号与基于解码方案（例如PR4的+2,0和-2）的期望值进行比较，以感测与至少一个期望值偏移的均衡器输出信号，以及 将每个偏移的事实表示为与振幅无关的误差信号。 信号感知的与振幅无关的误差信号反馈到均衡器的可调节抽头。 因此，简化的误差信号避免了波形误差的复杂计算，例如最小均方根计算。 误差信号可以被加权并且可以被调整以使同步提供的误差信号与均衡器的异步抽头对齐。

    Dynamically adapting a read channel equalizer
    9.
    发明授权
    Dynamically adapting a read channel equalizer 失效
    动态调整读通道均衡器

    公开(公告)号：US07589927B2

    公开(公告)日：2009-09-15

    申请号：US11215409

    申请日：2005-08-30

    申请人： Robert Allen Hutchins ,  Sedat Oelcer ,  Jens Jelitto ,  Evangelos S. Eleftheriou

    发明人： Robert Allen Hutchins ,  Sedat Oelcer ,  Jens Jelitto ,  Evangelos S. Eleftheriou

    IPC分类号： G11B5/35

    CPC分类号： G11B5/035 ,  G11B20/10046 ,  G11B20/10212 ,  G11B20/1201

    摘要： Provided is a read channel incorporated in a storage device to process signals read from a storage medium. The read channel includes an equalizer equalizing input read signals to produce equalizer output signals. A detector senses an adjusted equalizer output signal to determine an output value comprising data represented by the input read signals. An equalizer adaptor receives the output value from the detector to determine a first error signal used to adjust the equalizer operations. A component adjusts the equalizer output signals being transmitted to the detector, wherein the component is adjusted by a second error signal calculated from the output value from the detector, wherein the first and second error signals are different.

    摘要翻译： 提供了一种结合在存储装置中以读取从存储介质读取的信号的读通道。 读通道包括均衡器均衡输入读信号以产生均衡器输出信号。 检测器感测调整的均衡器输出信号以确定包括由输入读取信号表示的数据的输出值。 均衡器适配器从检测器接收输出值以确定用于调整均衡器操作的第一误差信号。 一个分量调整正被发送到检测器的均衡器输出信号，其中通过从检测器的输出值计算的第二误差信号调整分量，其中第一和第二误差信号是不同的。

    Using a measured error to determine coefficients to provide to an equalizer to use to equalize an input signal
    10.
    发明授权
    Using a measured error to determine coefficients to provide to an equalizer to use to equalize an input signal 失效
    使用测量误差来确定提供给均衡器的系数以用于均衡输入信号

    公开(公告)号：US07821733B2

    公开(公告)日：2010-10-26

    申请号：US12189096

    申请日：2008-08-08

    申请人： Evangelos S. Eleftheriou ,  Robert Allen Hutchins ,  Jens Jelitto ,  Sedat Oelcer

    发明人： Evangelos S. Eleftheriou ,  Robert Allen Hutchins ,  Jens Jelitto ,  Sedat Oelcer

    IPC分类号： G11B5/35

    CPC分类号： G11B5/09 ,  G11B5/00817 ,  G11B20/10009 ,  G11B20/10046

    摘要： Provided are a read channel, storage drive and method using a measured error to determine coefficients to provide to an equalizer to use to equalize an input signal. A read channel is incorporated in a storage device to process signals read from a storage medium. An equalizer uses coefficients to equalize input read signals to produce equalizer output signals. A detector processes adjusted equalizer output signals to determine output values comprising data represented by the input read signals. An equalizer adaptor is enabled to provide a reference measured error and coefficients used to produce the adjusted equalizer signals that are associated with the reference measured error. The equalizer adaptor computes new equalizer coefficients to use to equalize input read signals that result in a new measured error from the detector and computes a new measured error for the new equalizer coefficients. The equalizer adaptor determines whether the new measured error is degraded with respect to the reference measured error and saves the new equalizer coefficients and the new measured error in response to determining that the new measured error is not degraded with respect to the reference measured error. The equalizer adaptor provides the equalizer coefficients associated with the reference measured error to the equalizer to use to equalize input read signals in response to determining that the new measured error is degraded with respect to the reference measured error.

    摘要翻译： 提供了读通道，存储驱动器和使用测量误差的方法来确定提供给均衡器的系数以用于均衡输入信号。 读取通道并入存储装置中以处理从存储介质读取的信号。 均衡器使用系数来均衡输入读取信号以产生均衡器输出信号。 检测器处理经调整的均衡器输出信号以确定包括由输入读信号表示的数据的输出值。 启用均衡器适配器以提供参考测量误差和用于产生与参考测量误差相关联的经调整的均衡器信号的系数。 均衡器适配器计算新的均衡器系数以用于均衡来自检测器的导致新的测量误差的输入读取信号，并且计算新的均衡器系数的新的测量误差。 均衡器适配器确定新的测量误差是否相对于参考测量误差降级，并且响应于确定新的测量误差相对于参考测量误差而不降级而保存新的均衡器系数和新的测量误差。 均衡器适配器将与参考测量误差相关联的均衡器系数提供给均衡器以用于响应于确定新的测量误差相对于参考测量误差而降级来均衡输入读取信号。