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    A circuit for suppressing additive disturbances in data channels
    2.
    发明公开
    A circuit for suppressing additive disturbances in data channels 失效
    Schaltung zurUnterdrückungvon在Datenkanälen加入了Fehlern。

    公开(公告)号：EP0439299A2

    公开(公告)日：1991-07-31

    申请号：EP91300415.6

    申请日：1991-01-18

    申请人： International Business Machines Corporation

    发明人： Chung, Paul Wingshing ,  Jenkins, Michael Owen ,  Jove, Stephen Alan ,  Klaassen, Klaas Berend ,  Saber, Paik ,  Van Peppen, Jacobus Cornelius Leonardus

    IPC分类号： G11B20/24 ,  G11B20/00 ,  H03H21/00

    CPC分类号： G11B20/02 ,  G11B5/012 ,  G11B5/02 ,  G11B20/24 ,  G11B2005/0016

    摘要： A method and circuitry for suppressing additive transient disturbances in an analog differential input signal, such disturbances being due, for example, to thermal asperity transients caused by an MR transducer (10) contacting a moving storage surface (11). The input data signal is algebraically summed by a summing circuit (14) with a corrective feedback signal for providing as output signal. The output signal is fed back to a circuit (16) including an envelope detector (15) and differentiator (17) and converted into another signal that is the derivative of an amplitude envelope corresponding to the output signal. Nonlinear signal-adaptive filter means (18) converts the other signal into the corrective feedback signal, which substantially replicates the additive transient disturbance and is subtracted from the data input signal to render the output signal substantially free of the transient disturbance.
    The input, output and corrective signals are preferably differential signals.

    摘要翻译： 一种用于抑制模拟差分输入信号中的附加瞬态干扰的方法和电路，所述干扰是由例如由接触移动存储表面（11）的MR换能器（10）引起的热不均匀瞬变引起的。 输入数据信号由加法电路（14）用纠正反馈信号进行代数求和，以提供输出信号。 输出信号被反馈到包括包络检测器（15）和微分器（17）的电路（16），并被转换为作为与输出信号对应的幅度包络的导数的另一个信号。 非线性信号自适应滤波器装置（18）将另一信号转换成校正反馈信号，其基本上复制加法瞬态干扰，并从数据输​​入信号中减去，使得输出信号基本上没有瞬态干扰。 输入，输出和校正信号最好是差分信号。