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:
Dec. 25, 2001
Filed:
Dec. 01, 2000
Applicant:
Inventors:
Roubik Gregorian, Saratoga, CA (US);
Shih-Chung Fan, Fremont, CA (US);
Assignee:
Exar Corporation, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/06 ;
U.S. Cl.
CPC ...
H03L 7/06 ;
Abstract
A phase detector which detects the phase difference between the input clock and an output clock. That phase difference is used to gate a high frequency clock, which is provided to an integration circuit. The phase detector also indicates whether the phase difference is positive or negative. The output of the integration circuit is provided to a comparator, which compares the value to a threshold. When the threshold is exceeded, an advance or retard signal is provided to a phase selector. The phase selector selects one of multiple phases of a clock used for the output clock.