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:
Jan. 15, 1980
Filed:
Aug. 19, 1977
Hideshi Tamaru, Sagamihara, JP;
Sony Corporation, Tokyo, JP;
Abstract
A color television receiver for receiving a composite color television signal of the type having a chrominance component and which may include a VIR signal having a chrominance reference signal, comprises an input circuit, such as a band-pass amplifier, for receiving the chrominance signal and the chrominance reference signal, a chrominance demodulator for transforming the chrominance signal into red, blue, and green color signals, a video image display for presenting the color signals as a video picture, and a chrominance channel providing a pathway for the chrominance signal and chrominance reference signal between the input circuit and the chrominance demodulator. Included in the chrominance channel are first and second variable gain control circuits. A VIR-signal sensitive circuit is included to control the first variable gain control circuit in accordance with the amplitude of the chrominance reference signal. The second variable gain control circuit, interposed between the first variable gain control circuit and the demodulator, is selectively adjustable to provide preference adjustment of the amplitude of the chrominance signal. In the described embodiment, a level detector is included in advance of the second gain control circuit to provide to the VIR-signal sensitive circuit a level corresponding to the level of the chrominance reference signal.