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. 25, 1987
Filed:
Oct. 15, 1985
Kurt J Johannes, Hamburg, DE;
Jurgen Ruprecht, Hamburg, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
The invention relates to a gated control circuit for controlling an input signal, for example the chrominance signal formed by the color synchronizing signal and the color difference signal of a FBAS signal. The chrominance signal is controlled in dependence on the amplitude of the color synchronizing signal. To that end the color synchronizing signal is applied to an amplitude detector (3), the difference between the output signal of the amplitude detector (3) and a desired value is formed and the result is stored in a register (5). The output signal of the register (5) is applied to a control member (6) having an integrating behavior and including a counter whose counting rate can be changed in dependence on the value of the comparator circuit (4). The chrominance signal and the output signal of the control member (6) are applied to an adjusting member (1, 2), so that the chrominance signal is changed in accordance with the control deviation.