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  1. #1
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    20hz filter circuits

    Can anyone point me to a passive differential notch filter circuit?
    Everything I have found on the net is for a single ended circuit.
    I want to filter the telephone ringer on a digital answering machine.

    Thanks Guys.

    MAK

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  2. #2
    Full Member level 3
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    differential notch filter passive

    Hi
    You can design a differentiala notch filter use ANADIGM's FPAA ICs.
    Very simple and free design software.
    see
    http://www.anadigm.com


    ynhe



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