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. 02, 1993
Filed:
Feb. 10, 1992
Katuhiko Nishikawa, Aichi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A video signal processing circuit includes a separating circuit for separating a sync. signal of a video signal, a sample-and-hold circuit for subjecting a d.c. reference portion of the video signal to a sample-and-hold operation in response to the separated sync. signal, and a superimposing circuit for reversing the polarity of the d.c. reference voltage subjected to the sample-and-hold operation and superimposing it on the video signal to eliminate an unnecessary fluctuation component of the video signal. The separation of the sync. signal by the sync. separating circuit is performed on the basis of the video signal from which the unnecessary fluctuation component is eliminated by the superimposing circuit.