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:
Oct. 31, 2000
Filed:
Jun. 24, 1999
Applicant:
Inventor:
Chung-Wen Dennis Lo, Foster City, CA (US);
Assignee:
Cypress Semiconductor Corp., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
327157 ; 327148 ; 327-7 ; 327142 ; 331 / ;
Abstract
A digital phase detector and charge pump circuit system reset circuit and method resets a digital phase detector according to the charge outputs between the charge pump circuits and a following loop filter. The sensing circuitry emulates portions of the circuitry of the digital phase detector and charge pump circuit system and minimizes deadband time. Current mirror portions of the charge pump circuit alternate between p-channel and n-channel devices to regularize output voltage levels produced by the charge pump circuit system.