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:
Mar. 21, 1989
Filed:
Aug. 17, 1987
Applicant:
Inventors:
David A Byrd, San Jose, CA (US);
Gary W Tietz, Cupertino, CA (US);
Craig M Davis, Santa Clara, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
331 / ; 331 17 ; 331 27 ; 307516 ;
Abstract
A phase detector and charge pump combination is disclosed for use in a digital phase locked loop system. The phase detector includes a reset circuit that responds to the charge pump condition where it is simultaneously sourcing and sinking current. The pump up and down circuits are fast acting and balanced so that minimum conduction is employed for the phase lock condition.
Byrd, David. (1989). Digital phase comparator/charge pump with zero deadband and minimum (U.S. Patent No. 4814726). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4814726
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile