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:
Mar. 17, 1992
Filed:
Mar. 22, 1991
Yukihiro Shimakata, Tokyo, JP;
Kazutoshi Kubo, Tokyo, JP;
Japan Radio, Inc., Tokyo, JP;
Abstract
In a demodulator circuit which is simple in construction, a PSK modulated signal is converted in frequency into a quasi-base band signal and is then subjected to complex separation. Partly since a phase angle sampled from a digital complex signal is supplied to a differential-detector circuit, and partly since the differential-detector circuit processes only the phase angle, the differential-detector circuit has a simple construction. As the detected phase difference between two successive symbol data, an error between a carrier wave contained in the modulated signal and a locally oscillated frequency on the receiving side is compensated and is outputted as a digital demodulated signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile