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:
Mar. 08, 2022
Filed:
Apr. 24, 2018
Sony Semiconductor Solutions Corporation, Kanagawa, JP;
Masahiro Ichihashi, Fukuoka, JP;
Kenya Kondou, Fukuoka, JP;
Kazumasa Nishimura, Fukuoka, JP;
Syou Mitsuishi, Fukuoka, JP;
Toshio Suzuki, Fukuoka, JP;
Nobuhiko Shigyo, Fukuoka, JP;
Masayuki Katakura, Kanagawa, JP;
Motoyasu Yano, Kanagawa, JP;
SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa, JP;
Abstract
A charge pump circuit by which fundamental issues involved in the voltage feedback type charge pump circuit have been solved is realized. A power supply circuit includes a charge pump circuit, a feedback circuit feeding an output of the charge pump circuit back to an input of the charge pump circuit, a first current source causing a constant current to flow through the feedback circuit, a MOS transistor element interposed in a middle of the feedback circuit, a resistor element interposed at a position closer to the output of the charge pump circuit than the MOS transistor element in the feedback circuit, a bias circuit applying a constant voltage to a control terminal of the MOS transistor element, and a control section controlling a value of the constant current which the first current source flows through the feedback circuit.