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:
Jun. 07, 2011
Filed:
Sep. 08, 2009
Applicants:
Shinichi Saitoh, Kyoto, JP;
Yo Yamashiro, Kyoto, JP;
Inventors:
Shinichi Saitoh, Kyoto, JP;
Yo Yamashiro, Kyoto, JP;
Assignee:
Rohm Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A charge pump circuit is provided. A voltage/current conversion circuit compares a feedback voltage that corresponds to the output voltage of the charge pump circuit with a predetermined reference voltage, and generates a bias current that corresponds to the difference therebetween. An oscillator oscillates at a frequency that corresponds to the bias current. A buffer is biased by the bias current, and supplies a gate clock to the charge pump circuit based upon a clock signal output from the oscillator, thereby driving the charge pump circuit.