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. 02, 2009
Filed:
May. 25, 2007
Hiroki Akashi, Osaka, JP;
Takuya Ishii, Osaka, JP;
Yoshiyuki Konishi, Shiga, JP;
Makoto Ishimaru, Osaka, JP;
Hiroki Akashi, Osaka, JP;
Takuya Ishii, Osaka, JP;
Yoshiyuki Konishi, Shiga, JP;
Makoto Ishimaru, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
For downsizing a charge pump circuit which selects a voltage multiple ratio, converts its input voltage and outputs the converted voltage, the number of switching devices of the charge pump circuit is reduced. The control circuit of the charge pump circuit is configured to carry out switching control for multiple switching devices and charge/discharge at least a first capacitor and a second capacitor so as to have at least a 2Vi mode for alternately repeating a first state and a second state, and a 1.5Vi mode for alternately repeating a third state and a fourth state, thereby carrying out boosting depending on the detected input voltage.