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. 14, 1976
Filed:
Jul. 01, 1975
Applicant:
Inventor:
Tsutomu Niimura, Tokyo, JA;
Assignee:
Sony Corporation, Tokyo, JA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
178 / ;
Abstract
An automatic gain control circuit for a video signal amplifier to integrate the synchronizing pulse portion of the composite signal and apply the integrated signal to a pulse generating circuit to generate a pulse each time the integrated signal exceeds a certain level. The pulse, which has a fixed magnitude, is added to the amplified video signal in the same polarity relative to the blanking level as the luminance signal. A control circuit measures the peak-to-peak value of the combined signal and generates a controlling signal having a magnitude that varies with changes in the peak value and is used to control the gain of the amplifier.