Tracking comb filter includes charge-coupled-device delay line and phase-locked loop. Filter removes harmonics of frequency of repetition of welding-current pulses from acoustic-emission signal. Spurious signals reduced almost to fundamental limit.


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    Title :

    Tracking Comb Filter Suppresses Welder Harmonics


    Contributors:

    Published in:

    Publication date :

    1992-10-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




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