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. 24, 1992
Filed:
Apr. 11, 1991
Norimasa Furukawa, Tokyo, JP;
Shiro Morotomi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A signal processing circuit for a video camera includes: a voltage controlled oscillator for controlling an oscillation frequency in accordance with a control signal, a synchronism generation circuit for generating a synchronizing pulse signal in accordance with an output signal of the voltage controlled oscillator, and a phase comparison circuit for comparing the phase of the synchronizing pulse signal being output from the synchronism generation circuit with a signal corresponding to the phase of an AC utility power source. The voltage controlled oscillator is controlled by the output signal of the phase comparison circuit, and in turn controls the synchronism in accordance with the phase of the AC utility power.