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:
Feb. 28, 1989
Filed:
Apr. 03, 1987
Victor L Hansen, Beaverton, OR (US);
Eric Etheridge, Beaverton, OR (US);
Tektronix, Inc., Beaverton, OR (US);
Abstract
A multistage digital filter for producing an output data sequence in response to elements of an input data sequence includes a multiplier for multiplying elements of the input data sequence by selected coefficients to produce product terms. An accumulator sums product terms to produce elements of a first filter stage output sequence and elements of the first filter stage output sequence are sequentially fed back to the multiplier. The multiplier and accumulator produce accumulated sums in response to the first stage output sequence to provide a second filter stage output sequence. In a similar fashion, each filter stage output sequence is fed back to the multiplier as the input sequence to the next filter stage until the output sequence of the last filter stage is produced.