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:
Dec. 14, 1982
Filed:
Feb. 18, 1981
Kenichi Tonomura, Tachikawa, JP;
Kyoichi Takahashi, Kodaira, JP;
Hitachi, Ltd., both of, JP;
Hitachi Microcomputer Engineering Ltd., both of, JP;
Abstract
The phase detection circuit includes a first phase detector for receiving an input signal and a first reference signal, a second phase detector for receiving the input signal and a second reference signal having a different phase from that of the first reference signal and a level discriminator for receiving the phase detection output of the first phase detector. The detection operation of the second phase detector can be inhibited directly by means of the discrimination output of this level discriminator. Accordingly, the phase detection output can be obtained from this phase detection circuit only when the phase difference between the input signal and the first reference signal falls within a predetermined range. The phase detection circuit having such a limiting function is suitable for application to an automatic tint control circuit of a color television receiver.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile