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Programmable general purpose analog filter

  • US 3,987,293 A
  • Filed: 08/04/1975
  • Issued: 10/19/1976
  • Est. Priority Date: 08/04/1975
  • Status: Expired due to Term
First Claim
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1. A programmable general purpose filter comprising:

  • input signal sampler means, having an input terminal and a plurality of output terminals, each output terminal providing a sample of an input signal applied to said input terminal;

    reference signal sampler means having an input terminal and a plurality of output terminals, the number of output terminals being equal to the number of output terminals contained in said input signal sampler, each output terminal corresponding to one of said output terminals of said input signal sampler and providing a sample of a reference signal applied to said input terminal;

    a plurality of multipliers equal in number to the number of output terminals of said input signal sampler, each multiplier being coupled to an output terminal of said input signal sampler and to said corresponding output terminal of said reference signal sampler, each of said multipliers having an output terminal at which a signal representative of the multiplication of said input signal sample by said reference signal sample is provided; and

    summation means coupled to each of said output terminals of said plurality of multipliers for providing a signal representative of the sum of the products of said input signal samples by said reference signal samples, said sum being the sampled output response to said sampled input signal of a programmed filter defined by said sampled reference signal.

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