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:
May. 01, 2012
Filed:
Oct. 29, 2009
Akira Umezawa, Tokyo, JP;
Masaaki Kuwagata, Yokohama, JP;
Yasuhiko Honda, Hiratsuka, JP;
Gyosho Chin, Tokyo, JP;
Akira Umezawa, Tokyo, JP;
Masaaki Kuwagata, Yokohama, JP;
Yasuhiko Honda, Hiratsuka, JP;
Gyosho Chin, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A power circuit includes a reference potential circuit, a step-up circuit, and a conversion circuit. The reference potential circuit generates a reference potential. The step-up circuit generates a desired internal potential by stepping up a power supply potential. The step-up circuit includes a comparison circuit, a differential amplifier circuit, and a switch element. The comparison circuit outputs the result of comparison between a potential and the reference potential. The differential amplifier circuit is turned on or off by the operation control signal. The switch element performs on/off control according to the operation control signal and resets the output potential of the differential amplifier circuit. The conversion circuit converts the of the operation control signal so as to make longer the on period of the differential amplifier circuit and the off period of switch element.