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. 29, 2008
Filed:
Jan. 11, 2006
Applicant:
Richard William Swanson, San Jose, CA (US);
Inventor:
Richard William Swanson, San Jose, CA (US);
Assignee:
Xilinx, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A charge pump circuit has a charge pump section and a replica charge pump section. The replica charge pump section produces a replica voltage at which the UP current will match the DOWN current. A comparator compares the replica voltage to the output voltage, and adjusts the bias to the charge pump section and replica charge pump section so that the voltage level produced by the replica charge pump section matches the output voltage.