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:
Aug. 05, 1986
Filed:
Sep. 30, 1983
Henry G Lewis, Jr, Trenton, NJ (US);
RCA Corporation, Princeton, NJ (US);
Abstract
In a television receiver having digital signal processing, an automatic chrominance gain control apparatus employs a combination of analog gain control and digital gain control stages. Specifically, the analog gain control stage provides a range of fine gain control by altering the frequency response characteristic of the intermediate frequency (IF) amplifier circuits. This is sometimes referred to as 'IF tilt' control. The digital gain control stage provides coarse gain control in predetermined increments using a shifter in the digital signal processing circuits. The total gain required is calculated and is apportioned between the coarse and fine gain control stages by a microprocessor.