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Finite impulse response filter

  • US 5,931,898 A
  • Filed: 02/25/1997
  • Issued: 08/03/1999
  • Est. Priority Date: 02/25/1997
  • Status: Expired due to Term
First Claim
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1. A filter circuit comprising:

  • a voltage-to-current converter for receiving an input balanced voltage signal and providing an input balanced current signal;

    a first plurality of means (each) for receiving the (an) input balanced current signals for sampling and holding successive sample balanced current values;

    a second plurality of means for receiving and scaling the successive sampled balanced current values in accordance with a prescribed weighting program to achieve a desired transfer function for the filter, said scaling means including binary-ratioed impedance elements; and

    means for receiving the scaled balanced sampled current values (from said second means) and providing balanced output current values by summing at successive intervals different combinations of less than all of the scaled balanced sample current values (of the second plurality).

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