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:
Oct. 23, 1984
Filed:
Apr. 22, 1982
Nicolaas J Van Der Valk, Breda, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
NTSC-color television coding circuit comprising a series arrangement formed by a color difference signal matrix circuit, an I-signal and Q-signal matrix circuit, two low-pass filters, a modulator circuit and a superposition stage for supplying a quadrature-modulated chrominance signal. In order to obtain the chrominance sub-carrier burst in the chrominance signal, a burst-gate signal the pulse leading edge of which is produced before the beginning of the burst, is added to the -(B-Y) color difference signal. The chrominance signal in which the prolonged burst is distorted at the beginning by the filter is applied to a signal blanking circuit in which the distorted beginning is blanked and the burst in accordance with the standard is present in the chrominance signal obtained. Now, the burst amplitude can be adjusted, without a phase shift, by means of one potentiometer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile