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. 17, 1984
Filed:
Sep. 21, 1981
Applicant:
Inventors:
Felix Aschwanden, Thalwil, CH;
Willem H Groeneweg, Affoltern, CH;
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D / ; H03L / ;
U.S. Cl.
CPC ...
329 50 ; 331-4 ; 331 14 ; 331 17 ; 331 20 ; 358 25 ; 455260 ;
Abstract
A sampling PLL circuit features a frequency sweep caused by an offset voltage applied to an integrator to avoid false lock ups. At one end of the frequency range the polarity of the offset signal can be reversed. The error voltage can be sampled during a television vertical or horizontal blanking period. Once proper lock up is achieved, the offset signal can be removed.
Aschwanden, Felix. (1984). Frequency search system for a phase locked loop (U.S. Patent No. 4443769). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4443769
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile