The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 30, 1986
Filed:
Jan. 20, 1984
Leonard N Schiff, Lawrenceville, NJ (US);
RCA Corporation, Princeton, NJ (US);
Abstract
Output weighted FIR filters usually consist of a tapped delay line, weighting circuits coupled to the taps for weighting delayed samples and adder circuitry for combining the weighted samples. In designing such circuitry, tradeoffs are made between device complexity and the desired filter transfer function. FIR filters employing shift-and-add weighting circuits may have the resolution of their weighting circuits significantly enhanced with slight added circuit complexity by providing a parallel tapped delay line to which scaled input samples are applied. The scaled and non-scaled signal samples from the parallel tapped delay lines are both made available to the weighting circuits. The availability of both such samples for shifting and adding, nominally increases the number of possible weighting coefficients realizable from the weighting circuits more than two fold and thus, improves the design flexibility of the filter significantly.