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. 24, 2007
Filed:
Mar. 25, 2005
Tatsuya Suzuki, Kumagaya, JP;
Yasuhiro Kaneda, Isesaki, JP;
Tatsuya Suzuki, Kumagaya, JP;
Yasuhiro Kaneda, Isesaki, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A reverse current is prevented in a charge pump circuit. A complementary pair of clocks CLK and *CLK varies while a first through a fourth charge transfer MOS transistors MMMand Mare turned off. Then the second charge transfer MOS transistor Mis turned on to discharge a first pumping capacitor CA and the third charge transfer MOS transistor Mis turned on to charge a second pumping capacitor CB. Next, the complementary pair of clocks CLK and *CLK varies after the first through the fourth charge transfer MOS transistors MMMand Mare turned off again. Then the fourth charge transfer MOS transistor Mis turned on to discharge the second pumping capacitor CB and the first charge transfer MOS transistor Mis turned on to charge the first pumping capacitor CA.