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:
Jul. 23, 1991
Filed:
May. 25, 1990
Kenji Shibayama, Shinagawa, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A horizontal synchronous signal separation circuit is applied to video apparatus such as a video tape recorder, television receiver, and projector. The separation circuit includes a signal separating portion for detecting the trailing edge of a horizontal synchronous signal and obtaining a separation signal whose timing is referenced to the trailing edge, a window pulse generating portion for obtaining a window pulse whose timing is referenced to the leading edge of the synchronous signal, and a gate for subjecting the separation signal generated by the signal separating portion to a masking process by the window pulse. The gate which causes the separation signal to be subjected to a masking process, may directly output the window pulse as the separation signal if the separation signal is not present within the window. The separated synchronous signal finally obtained has a timing reference related to the trailing edge of the original horizontal signal, and the synchronous signal can be separated reliably and the synchronizing system of a video apparatus can be made stable.