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    Signal correlator with improved dynamic range
    1.
    发明授权
    Signal correlator with improved dynamic range 失效
    信号相关器具有改善的动态范围

    公开(公告)号：US3867620A

    公开(公告)日：1975-02-18

    申请号：US32714573

    申请日：1973-01-26

    Applicant: PRINCETON APPLIED RES CORP

    Inventor： COOR THOMAS

    IPC: G06G7/16 ,  G06G7/161 ,  G06G7/186 ,  G06G7/19

    CPC classification number: G06G7/161 ,  G06G7/1928

    Abstract: Providing an indication of the product of two arbitrary signals utilizing an electronic multiplier whose output signal will include DC drift and offset due to circuit imperfections in said multiplier, wherein prior to multiplying said signals in said multiplier, multiplying one of said signals with a predetermined polarity reversing signal to provide said one signal repetitively reversed in polarity in accordance with the sign of said predetermined polarity reversing signal, multiplying said one signal repetitively reversed in polarity times the other of said signals in said multiplier to provide the product of said signals in the form of a predetermined product signal repetitively polarity reversed in accordance with the sign of said predetermined polarity reversing signal, the output signal from said multiplier comprised of said predetermined product signal and said DC drift and offset and wherein the peak-to-peak amplitude of said predetermined product signal is proportional substantially only to the actual product of said signals and is substantially independent of said DC drift and offset; filtering said predetermined product signal out of said output signal; and synchronously rectifying said product signal in synchronism with said predetermined polarity reversing signal to provide a DC signal which is said indication of the product of said two arbitrary signals.

    Abstract translation: 使用电子倍增器提供两个任意信号的乘积的指示，该电子乘法器的输出信号将由于所述乘法器中的电路缺陷而包括DC漂移和偏移，其中在乘法器之前的所述信号乘以预定极性的所述信号之一 将所述一个信号根据所述预定极性反转信号的符号提供反向极性反转的信号，将所述一个信号乘以所述乘数中所述信号中的另一个重复地反转以提供所述信号的乘积 根据所述预定极性反转信号的符号反复极性的预定乘积信号，来自所述乘法器的输出信号由所述预定乘积信号和所述DC漂移和偏移组成，并且其中所述预定的 产品信号是比例尺 仅相对于所述信号的实际乘积，并且基本上与所述DC漂移和偏移无关; 从所述输出信号中滤出所述预定乘积信号; 以及与所述预定极性反转信号同步地同步整流所述产品信号，以提供作为所述两个任意信号的乘积的所述指示的DC信号。

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