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:
Jan. 12, 1993
Filed:
Apr. 03, 1991
Gary L Wagner, Menlo Park, CA (US);
Loral Aerospace Corp., New York, NY (US);
Abstract
An electronic data filter system (10), which functions as an approximation of a perfect matched filter, receives a conventional square-wave digital input signal (12) and outputs a filtered output signal (18). Output signal (18) appears as the summed integral of input signal (12). Filter system (10) includes a rate detector (50), which receives input signal (12) and provides a tuning voltage (16), and a data filter (30) which provides output signal (18). Data filter (30) includes, arranged in series, a notch filter (80) and a low-pass filter (90), wherein such filters (80, 90) contain capacitive-inductive circuits having certain value ratios which are tunable responsive to tuning voltage (16). Signal degradation of the filtered signal (12, 18) is minimized by filter system (10), which reduces the bit error rate (BER) and noise bandwidth of the filtered signal (12, 18). In one embodiment, data filters (30) are cascaded in parallel to extend data filtering bandwidth.