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:
Apr. 30, 1985
Filed:
Feb. 09, 1983
Applicant:
Inventor:
Theodore H York, Raleigh, NC (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
329104 ; 329110 ; 329126 ; 375 82 ; 375 94 ;
Abstract
A microprocessor-based coherent phase shift keyed demodulator determines the phase of an incoming carrier signal by analyzing zero-crossings of the carrier derived by polarity sampling of the carrier. The polarity samples are initiated by sample pulses produced in bursts, with each burst being triggered by a single microprocessor interrupt. The sample rate within a burst is an exact multiple of the microprocessor clock frequency and is on the order of the basic microprocessor instruction time.