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:
Sep. 08, 2009
Filed:
Sep. 27, 2007
Applicants:
Chenxiao Ren, Shanghai, CN;
Zhongyuan Chang, Shanghai, CN;
Inventors:
Chenxiao Ren, Shanghai, CN;
Zhongyuan Chang, Shanghai, CN;
Assignee:
Integrated Device Technology, Inc., San Jose, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A clock generator includes a phase-lock loop for generating an output clock signal based on a reference clock signal. The phase-lock loop includes a charge pump, a low-pass filter, and a self-bias circuit. The low-pass filter generates a bias voltage and the self-bias circuit generates a charge current based on the bias voltage. The charge pump generates an output based on the charge current to maintain a constant open-loop bandwidth of the phase-lock loop.