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:
Aug. 22, 2000
Filed:
Feb. 01, 1999
Kazuhiko Fukushima, Hyogo, JP;
Atsuo Yamaguchi, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Mitsubishi Electric System LSI Design Corporation, Hyogo, JP;
Abstract
A charge pump circuit comprises a plurality of booster stages. Each booster stage has a first node, a second node, a first charge pump and a second charge pump. Both charge pumps operate in a complementary manner, and raise potential of the second node relative to potential of the first node by transferring charge from the first node to the second node. Each charge pump comprises a pumping capacitor, an NMOS transistor and a PMOS transistor. In each charge pump, the NMOS transistor is used for charging the pumping capacitor with charge input through the first node, and the PMOS transistor is used for discharging the pumping capacitor to send charge to the second node.