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:
Dec. 28, 2004
Filed:
Sep. 17, 2002
Minoru Sudou, Chiba, JP;
Seiko Instruments Inc., Chiba, JP;
Abstract
A voltage regulator which suppresses an inrush current at the time of power application has input and output terminals, a power supply connected to the input terminal, a switch circuit connected to the power supply, a coil connected between the switch circuit and the output terminal, a rectifying device connected in series between the coil and the output terminal, an output capacitor connected to the output terminal, a switching element connected between the coil and the rectifying device, a driving circuit for driving the switching element, a transistor connected between the power supply and the coil, and a control circuit connected to the transistor for gradually varying an ON resistance of the transistor from a relatively large value immediately after the switch circuit is turned on to a relatively small value a predetermined time thereafter to limit a rush current flowing into the output capacitor from the power supply.