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. 27, 2004
Filed:
Aug. 23, 2002
Applicant:
Inventors:
Randy Tsang, Foster City, CA (US);
Shuran Wei, San Jose, CA (US);
Assignee:
Marvell International, Ltd., Hamilton, BM;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 4/06 ;
U.S. Cl.
CPC ...
H03L 4/06 ;
Abstract
A phase locked loop including a loop filter to generate a control voltage as a function of an input signal and a. reference voltage. A voltage controlled oscillator (VCO) coupled to the loop filter, includes a varactor having terminals. In response to the control voltage, the VCO generates a periodic output signal having a frequency that is a function of the varactor and the control voltage. The VCO duplicates noise appearing on one of the varactor terminals to another of the varactor terminals so that noise in the periodic output signal is reduced.