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:
May. 08, 1979
Filed:
Oct. 06, 1977
Katsuo Isono, Kawagoe, JP;
Seiji Sanada, Yokosuka, JP;
Sony Corporation, Tokyo, JP;
Abstract
A color correction circuit responsive to a VIR signal that includes a clamping circuit to clamp a color demodulated signal to a predetermined voltage level during the chrominance reference portion of the VIR signal. A sample-and-hold circuit samples the luminance reference portion of the VIR signal immediately succeeding the clamped portion and holds the sampled value, and a comparator compares the sampled signal with the predetermined clamping voltage to generate an error-correction voltage that can be applied to a gain-control amplifier in the chrominance channel to correct saturation and to a phase-control circuit to adjust the hue by shifting the phase of the locally generated subcarrier.