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:
Nov. 18, 1980
Filed:
Dec. 26, 1978
Hidetoshi Mochizuki, Kokubunji, JP;
Masataka Okada, Konosu, JP;
Clarion Co., Ltd., Tokyo, JP;
Abstract
An AGC circuit comprises a video IF amplifier for receiving a amplitude-modulated broadcast wave of a video signal with a signal level having a constant amplitude added thereto, a means connected to the output of said amplifier for generating a video detection output signal of said broadcast wave, and a means connected to the output of said generating means for detecting said signal level from the video detection output signal and for generating an output signal representing the signal level during the existing period of the signal level. The output signal representing the signal level is applied to the video IF amplifier and is used as a biasing signal of the amplifier. The signal level having a constant amplitude is a gray level existing intermediate between a black level and a white level.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile