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. 03, 2015
Filed:
Feb. 06, 2013
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Hiroyuki Nakamoto, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A power supply circuit includes: a first switch and a second switch that are connected in series between an input voltage terminal and a reference power supply; a controller that controls the first and second switches to be turned on and off by turns; a comparator that has an inverting input terminal connected to a voltage supply and that has a non-inverting input terminal connected to a first terminal of a capacitor; a third switch that is provided between an output terminal and the non-inverting input terminal of the comparator; a fourth switch that is provided between a connection node of the first and second switches, and a second terminal of the capacitor; and a latch circuit that detects change of output of the output terminal of the comparator and controls the second switch to be turned off.