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:
Apr. 27, 1982
Filed:
Jun. 09, 1980
Nicolaas J Van der Valk, Breda, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
An encoding circuit for a SECAM color television transmitter having a frequency modulator circuit for a modulating signal which comprises two color difference signals which follow one another line-sequentially and are controlled by means of two phase control loops and two reference signal generators. A first reference signal generator has one of the reference frequencies whereas the frequency of the signal generated by the second reference signal generator is a harmonic of the line frequency. The phase control loop to which the second reference signal generator is connected comprises a sample and hold circuit which is operative at field frequency.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile