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. 10, 2001
Filed:
Sep. 27, 1999
Applicant:
Inventors:
Matteo Conta, Irvine, CA (US);
Akbar Ali, Garden Grove, CA (US);
Assignee:
Conexant Systems, Inc., Newport Beach, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/089 ; H03L 7/093 ;
U.S. Cl.
CPC ...
H03L 7/089 ; H03L 7/093 ;
Abstract
In a phase lock loop, a charge pump includes a current mirror circuit. The current mirror circuit contains a bias current source and a current mirror source which mirrors the current of the bias current source. The current mirror source is turned on and off in accordance with an output signal from a phase detector to produce correction signals for a VCO. To conserve power, circuits are provided for turning the bias current source on just before it is needed by the current mirror source and for turning the bias current source off just after the current mirror source turns off.