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:
Feb. 25, 2003
Filed:
Nov. 19, 2001
Yoshiyuki Hojo, Kyoto, JP;
Yoshihisa Hiramatsu, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A power supply device has a soft starting circuit , which is composed of a transistor Tr having its emitter connected to the emitter of a transistor Tr of which the base serves as a non-inverting input terminal of a comparator and having its collector grounded, a clamp circuit connected between the base of the transistor Tr and the base of the transistor Tr , a constant-current source receiving a supply voltage Vcc through a switch , a capacitor Cs having one end connected to the base of the transistor Tr and having the other end grounded, a switch connected to the capacitor Cs, having its contact “c” connected to the constant-current source , and having its contact “d” connected to a discharge circuit , and the discharge circuit