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1.发明授权Decision error compensation technique for decision-directed timing recovery loop 有权用于决策定时恢复循环的决策误差补偿技术公开(公告)号：US06738206B2
公开(公告)日：2004-05-18
申请号：US09990962
申请日：2001-11-14
IPC分类号： G11B2020
CPC分类号： G11B20/10009 , G11B21/025 , H03L7/087 , H03L7/091
摘要： A circuit for use in a phase lock loop including a first phase detector to detect a first phase error between input signals, the first phase detector obtaining the first phase error during a first time period, a second phase detector to detect a second phase error between the input signals, the second phase detector obtaining the second phase error during a second time period, the second time period being longer than the first time period, and a compensation circuit to compensate the first phase error with a portion of the second phase error signal.
摘要翻译： 一种用于锁相环的电路，包括检测输入信号之间的第一相位误差的第一相位检测器，第一相位检测器在第一时间段期间获得第一相位误差;第二相位检测器，用于检测第一相位误差， 所述输入信号，所述第二相位检测器在第二时间段期间获得所述第二相位误差，所述第二时间段长于所述第一时间周期;以及补偿电路，用于补偿所述第一相位误差与所述第二相位误差信号的一部分 。
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2.发明授权Method and apparatus for implementing a noise generator in an integrated circuit disk drive read channel 失效在集成电路磁盘驱动器读通道中实现噪声发生器的方法和装置
公开(公告)号：US5914827A
公开(公告)日：1999-06-22
申请号：US608296
申请日：1996-02-28
CPC分类号： G11B20/182 , G11B5/012
摘要： A method and apparatus for implementing a noise generator in an integrated circuit read channel to optimize the performance of the signal channel. In the preferred embodiment resistors are used to generate noise. The noise source is buffered and the noise signal passes through a pre-amplifier stage. A differential current digital-to-analog converter controlled multiplier cell controls the amplitude of the noise signal. A switch connects the noise signal to a differential current output buffer, which is coupled to a signal channel.
摘要翻译： 一种用于在集成电路读通道中实现噪声发生器以优化信号通道的性能的方法和装置。 在优选实施例中，电阻器用于产生噪声。 噪声源被缓冲，噪声信号通过前置放大器级。 差分电流数模转换器控制的乘法器单元控制噪声信号的幅度。 开关将噪声信号连接到差分电流输出缓冲器，该缓冲器耦合到信号通道。
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