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. 30, 1990
Filed:
Jan. 24, 1989
Antonius H Nillesen, Eindhoven, NL;
U. S. Philips Corporation, New York, NY (US);
Abstract
In a color television signal decoding circuit having a first phase-locked loop comprising a color synchronizing signal phase detection circuit (9) for a first digital oscillator (15) which supplies reference signals for demodulating a digital chrominance signal, and a second phase-locked loop comprising a line synchronizing signal phase detection circuit (65) for a second digital oscillator (29) which supplies a clock signal having a frequency coupled to the line frequency for an analog-to-digital converter (3) and for the first digital oscillator (15), the first phase-locked loop and a coupling (73, 45, 37) between the two loops is interrupted (41) when a stable synchronization state of the second phase-locked loop is detected (85), while a new phase-locked loop for the second digital oscillator (29) is formed which is then controlled (59, 67, 121, 71) by the color synchronizing signal phase detection circuit (9) so that further signal operations of the decoded signals can be performed with greater accuracy.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile