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:
Jun. 05, 1990
Filed:
Jun. 23, 1988
Applicant:
Inventors:
Yositeru Kosaka, Zushi, JP;
Kunio Yamada, Tokyo, JP;
Assignee:
Victor Company of Japan, Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
358 31 ; 358329 ;
Abstract
A voltage controlled comb filter comprises a 1 H delay circuit, an inverting circuit, and a mixing circuit. A playback carrier chrominance signal is delayed by the delay circuit for 1 H period and is inverted by the inverting circuit. The playback and delayed playback carrier chrominance signals are inputted to the mixing circuit which mixes these signals in proportion variable in accordance with the degree of a line correlation error signal. Therefore, there is no switching noise inherent in the conventional comb filter having a switch circuit used in a video tape recorder.