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:
Jul. 28, 1998
Filed:
Oct. 15, 1996
Applicant:
Inventors:
Mehdi H Sani, San Diego, CA (US);
De Dzwo Hsu, San Diego, CA (US);
Willard K Bucklen, Greensboro, NC (US);
Assignee:
Fairchild Semiconductor Corporation, South Portland, ME (US);
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348520 ; 348539 ; 348540 ;
Abstract
A color subcarrier signal generator for use e.g, in a video converter measures the average error of the horizontal synchronizing signal frequency. The measured error is used as a compensator signal to control a direct digital synthesizer to generate a correct color subcarrier signal. The direct digital frequency synthesizer includes an address generator receiving the error signal and a look up table driven by the address generator.