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:
Apr. 15, 1980
Filed:
Oct. 26, 1977
Applicant:
Inventors:
Hiroshi Iijima, Tokyo, JP;
Yasushi Sano, Tokyo, JP;
Assignee:
Nippon Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ; H04N / ; H03B / ;
U.S. Cl.
CPC ...
358150 ; 358152 ; 358153 ; 331 20 ;
Abstract
A television video vertical sync detector which produces a vertical sync pulse. This detector includes a separating circuit for the production of horizontal sync pulses, equalizing pulses and vertical sync pulses, and a phase control oscillator. The phase control oscillator includes a phase comparator low pass filter, a voltage control oscillator for generating clock pulses, a division circuit and a delay circuit. A sampling circuit is used to generate the final vertical sync pulse.