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. 28, 1976
Filed:
Sep. 24, 1975
Applicant:
Inventor:
Yoichi Tan, Tokyo, JA;
Assignee:
Nippon Electric Company, Ltd., Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
H03D / ;
U.S. Cl.
CPC ...
329112 ; 329104 ; 325320 ; 331 12 ; 331 14 ;
Abstract
A synchronized carrier recovery circuit for a PSK modulated signal includes a plurality of phase detectors supplied with the PSK input signal and phase shifted outputs from a voltage controlled oscillator. The detector outputs are rectified and alternately coupled to a pair of adders whose outputs feed a complimentary subtractor. The detector outputs are also converted to digital form and fed to an Exclusive OR circuit, whose output couples the appropriate subtractor outputs to the VCO to achieve phase locked synchronization.
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Tan, Yoichi. (1976). Multi-phase psk demodulator (U.S. Patent No. 3983499). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3983499
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile