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71.发明授权公开(公告)号：US07773326B2
公开(公告)日：2010-08-10
申请号：US11870885
申请日：2007-10-11
IPC分类号： G11B5/09
CPC分类号： H04L7/0029 , G11B20/10009 , G11B20/10222 , G11B20/10425 , G11B2220/90 , H03L7/07 , H03L7/087 , H03L7/091 , H04L7/0025 , H04L7/0054
摘要： Phase-error combination methods for a multi-channel data detection system with a phase locked loop for each channel, comprises receiving phase error information with respect to each channel; combining the received phase error information and generating a combined phase error; and applying the combined phase error to at least one channel phase locked loop. Error signal combination comprises receiving error information of a signal relevant to a phase locked loop with respect to each channel; combining the received error signal information and generating a combined error signal, weighting the received error signal information from each channel, for example with reliability information. The combined, weighted error signal is applied to at least one channel phase locked loop.
摘要翻译： 具有用于每个通道的锁相环的多通道数据检测系统的相位误差组合方法包括接收关于每个通道的相位误差信息; 组合所接收的相位误差信息并产生组合相位误差; 以及将组合的相位误差应用于至少一个通道锁相环。 误差信号组合包括相对于每个通道接收与锁相环相关的信号的误差信息; 组合接收到的误差信号信息并产生组合误差信号，例如用可靠性信息对来自每个信道的接收到的误差信号进行加权。 组合的加权误差信号被施加到至少一个通道锁相环。
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公开(公告)号：US20100177423A1
公开(公告)日：2010-07-15
申请号：US12351464
申请日：2009-01-09
IPC分类号： G11B5/09
CPC分类号： G11B5/09 , G11B20/10009 , G11B20/10027
摘要： A system according to one embodiment includes an analog input for receiving an analog signal; a variable gain amplifier coupled to the analog input; a first gain control circuit coupled to the variable gain amplifier for controlling the gain of the analog signal; an analog to digital converter for converting the analog signal to a digital signal; a first gain error generation circuit for generating a first gain error signal based on an output of the analog to digital converter, the first gain error signal or derivative thereof being received by the first gain control circuit; and a second gain error generation circuit for generating a second gain error signal based on the digital signal, the second gain error signal or derivative thereof being received by the first gain control circuit, wherein the first gain control circuit uses at least one of the gain error signals to control the gain of the analog signals.
摘要翻译： 根据一个实施例的系统包括用于接收模拟信号的模拟输入; 耦合到模拟输入的可变增益放大器; 耦合到可变增益放大器的第一增益控制电路，用于控制模拟信号的增益; 用于将模拟信号转换成数字信号的模数转换器; 第一增益误差产生电路，用于基于所述模数转换器的输出产生第一增益误差信号，所述第一增益误差信号或其导数由所述第一增益控制电路接收; 以及第二增益误差产生电路，用于根据由第一增益控制电路接收的数字信号，第二增益误差信号或其导数产生第二增益误差信号，其中第一增益控制电路使用增益中的至少一个 误差信号来控制模拟信号的增益。
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73.发明授权System and method for controlling line driver power in digital subscriber line modems 有权用于数字用户线路调制解调器控制线路驱动器功率的系统和方法公开(公告)号：US07352802B2
公开(公告)日：2008-04-01
申请号：US11237001
申请日：2005-09-28
申请人： Gordon Taylor Davis , Jeffrey Haskell Derby , Evangelos Stavros Eleftheriou , Sedat Oelcer , Malcolm Scott Ware
发明人： Gordon Taylor Davis , Jeffrey Haskell Derby , Evangelos Stavros Eleftheriou , Sedat Oelcer , Malcolm Scott Ware
CPC分类号： H04L25/028 , H04L27/2626 , H04M11/062 , Y02D50/44
摘要： A low power DSL modem transmitter, suitable for incorporation in integrated DSLAM server line cards, transmits full power physical frames which include a control channel and a data field when data is available for transmission and physical frames having only a control channel or a control channel and a low power synchronization field when data is not available for transmission. And a method for controlling the total power dissipated in the integrated DSLAM by selectively restricting the flaw of data packets to the DSLs.
摘要翻译： 适用于集成DSLAM服务器线路卡的低功率DSL调制解调器发射机在数据可用于传输和仅具有控制信道或控制信道的物理帧的情况下传输包括控制信道和数据字段的全功率物理帧， 当数据不可用于传输时的低功率同步字段。 以及一种通过选择性地将数据分组的缺陷限制到DSL来控制集成DSLAM中消耗的总功率的方法。
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公开(公告)号：US20070047127A1
公开(公告)日：2007-03-01
申请号：US11215409
申请日：2005-08-30
IPC分类号： G11B5/035
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。
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75.发明申请Method for a cyclic dibit response estimation in a media system using a data set separator sequence 失效在使用数据集分隔符序列的媒体系统中进行循环双位响应估计的方法公开(公告)号：US20060250719A1
公开(公告)日：2006-11-09
申请号：US11122680
申请日：2005-05-05
IPC分类号： G11B5/09
CPC分类号： G11B20/10 , G11B20/10009 , G11B20/10046
摘要： A dibit response estimation generator receives a DSS sequence and a DSS readback sequence, which is a function of a channel processing of the DSS sequence by a read channel. The generator generates a cyclic dibit response vector as a function of the DSS sequence and the DSS readback sequence. The generator further generates an error signal as a function of a comparison of the DSS readback sequence and a filtering of the DSS sequence based on the cyclic dibit response vector. An unacceptable error signal indicates a need to adjust the cyclic dibit response vector to yield an acceptable comparison of the DSS readback sequence and the filtering of the DSS sequence based on the cyclic dibit response vector.
摘要翻译： 双向响应估计生成器接收DSS序列和DSS回读序列，DSS序列是通过读取通道的DSS序列的信道处理的函数。 发生器产生作为DSS序列和DSS回读序列的函数的循环双位响应向量。 发生器还根据DSS回读序列的比较和基于循环双位响应向量的DSS序列的滤波产生误差信号。 不可接受的误差信号表示需要调整循环双位响应向量，以产生DSS回读序列的可接受比较和基于循环双位响应向量的DSS序列的过滤。
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公开(公告)号：US20060119969A1
公开(公告)日：2006-06-08
申请号：US11003283
申请日：2004-12-03
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。
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公开(公告)号：US20060039457A1
公开(公告)日：2006-02-23
申请号：US11237001
申请日：2005-09-28
IPC分类号： H04B1/38
CPC分类号： H04L25/028 , H04L27/2626 , H04M11/062 , Y02D50/44
摘要： A low power DSL modem transmitter, suitable for incorporation in integrated DSLAM server line cards, transmits full power physical frames which include a control channel and a data field when data is available for transmission and physical frames having only a control channel or a control channel and a low power synchronization field when data is not available for transmission. And a method for controlling the total power dissipated in the integrated DSLAM by selectively restricting the flow of data packets to the DSLs.
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78.发明申请公开(公告)号：US20130128374A1
公开(公告)日：2013-05-23
申请号：US13304227
申请日：2011-11-23
CPC分类号： G11B20/10046 , G11B20/10509 , G11B2220/90 , H03H21/0012 , H03H2021/0072
摘要： A method for selecting which tap coefficients of a programmable finite-impulse-response (FIR) equalizer to fix is disclosed. In one embodiment, such a method includes performing an initial calibration to determine an initial value for each tap coefficient of a FIR equalizer. These initial values may be used to produce a first waveform. The method then performs an operation on the first waveform to produce a second waveform comprising multiple lobes. The second waveform is then analyzed to determine one or more lobes of the second waveform that have the largest area. The method then fixes coefficients of one or more taps that are closest to the lobe or lobes having the largest area. A corresponding apparatus and computer program product are also disclosed.
摘要翻译： 公开了一种用于选择可修复有限脉冲响应（FIR）均衡器的抽头系数以进行固定的方法。 在一个实施例中，这种方法包括执行初始校准以确定FIR均衡器的每个抽头系数的初始值。 这些初始值可用于产生第一波形。 该方法然后对第一波形执行操作以产生包括多个波瓣的第二波形。 然后分析第二波形以确定具有最大面积的第二波形的一个或多个波瓣。 该方法然后固定最靠近具有最大面积的凸角或凸角的一个或多个抽头的系数。 还公开了相应的装置和计算机程序产品。
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公开(公告)号：US20120126876A1
公开(公告)日：2012-05-24
申请号：US13342881
申请日：2012-01-03
IPC分类号： G06G7/18
CPC分类号： G11B20/10009 , G11B5/09 , G11B20/10027 , G11B20/10037 , G11B20/10046 , G11B20/10055 , G11B20/10074 , G11B20/10175 , G11B20/10212 , G11B20/10425 , G11B2220/90
摘要： A method according to one embodiment includes receiving an increment signal at a first integrator when a second integrator overflows; receiving a decrement signal at the first integrator when the second integrator underflows; and incrementing or decrementing a gain applied to an analog signal based on receipt of the increment or decrement signal. A system according to one embodiment includes a first integrator configured to cause incrementing of a gain applied to an analog signal based on receipt of an increment signal when a second integrator overflows, the first integrator being configured to cause decrementing of the gain applied to the analog signal based on receipt of a decrement signal when the second integrator underflows; and the second integrator.
摘要翻译： 根据一个实施例的方法包括当第二积分器溢出时在第一积分器处接收增量信号; 当第二积分器下溢时，在第一积分器处接收递减信号; 以及基于所述增量或减量信号的接收递增或递减施加到模拟信号的增益。 根据一个实施例的系统包括第一积分器，其被配置为当第二积分器溢出时，基于接收到增量信号来增加施加到模拟信号的增益，所述第一积分器被配置为引起施加到模拟信号的增益的递减 当第二积分器下溢时基于接收到递减信号的信号; 和第二个积分器。
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80.发明授权System and method for generating an amplitude error signal in a magnetic tape recording channel 有权用于在磁带记录通道中产生振幅误差信号的系统和方法公开(公告)号：US07924524B2
公开(公告)日：2011-04-12
申请号：US12351432
申请日：2009-01-09
IPC分类号： G11B5/035
CPC分类号： G11B5/035 , G11B20/10009 , G11B20/10027 , G11B2220/90 , H04L25/03248
摘要： A method according to one embodiment includes generating a first gain error, comprising: receiving an output of an equalizer; and comparing a magnitude of the output to a saturation threshold level; if the output is higher than the saturation threshold level, generating a first gain error. The method further including generating at least one of a second and a third gain error, wherein generating the second gain error comprises: using either a slicer or a trellis for generating the second gain error, wherein the slicer generates a gain error based on an output of an interpolator, wherein the trellis generates a gain error based on an output of a maximum likelihood detector; wherein generating the third gain error comprises: receiving an output of an equalizer; generating a threshold qualified peak from the equalizer output and a tracking threshold level; comparing the threshold qualified peak to a second threshold; and generating a third gain error based on the comparison.
摘要翻译： 根据一个实施例的方法包括产生第一增益误差，包括：接收均衡器的输出; 以及将所述输出的幅度与饱和阈值电平进行比较; 如果输出高于饱和阈值电平，则产生第一增益误差。 该方法还包括产生第二和第三增益误差中的至少一个，其中产生第二增益误差包括：使用限幅器或网格来产生第二增益误差，其中限幅器基于输出产生增益误差 其中所述网格基于最大似然检测器的输出产生增益误差; 其中产生所述第三增益误差包括：接收均衡器的输出; 从均衡器输出产生阈值合格峰值和跟踪阈值电平; 将阈值合格峰值与第二阈值进行比较; 以及基于所述比较产生第三增益误差。
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