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Digital filter and oversampling analog to digital converter employing the same

  • US 5,506,798 A
  • Filed: 09/26/1994
  • Issued: 04/09/1996
  • Est. Priority Date: 12/28/1993
  • Status: Expired due to Fees
First Claim
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1. A digital filter, comprising:

  • tap coefficient setting means for setting a single set of tap coefficients; and

    convolution calculation means for performing convolution calculation using the single set of tap coefficients from said tap coefficient setting means and input data;

    said convolution calculation means being constructed, in order to allow variation of the cut-off frequency of said digital filter, to repetitively perform the processing of first performing repetitive convolution calculation wherein a same convolution calculation operation is performed once or successively by a plurality of times using same tap coefficients of the single set of tap coefficients or same input data and then varying the tap coefficient or the input data to allow the repetitive convolution calculation to be repeated.

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