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:
Aug. 06, 2002
Filed:
Apr. 28, 2000
Applicant:
Inventors:
Jun Kajiwara, Kyoto, JP;
Katsuji Satomi, Osaka, JP;
Shiro Sakiyama, Osaka, JP;
Masayoshi Kinoshita, Osaka, JP;
Katsuhiro Ootani, Nara, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/40 ; A02M 7/00 ; H03R 1/716 ;
U.S. Cl.
CPC ...
G05F 1/40 ; A02M 7/00 ; H03R 1/716 ;
Abstract
In a switching regulator, switching noise is reduced with keeping high conversion efficiency. The switching regulator includes plural output switching transistors through having different on-resistances, which are operated nadescending order of on-resistance in the on operation and are operated in an ascending order of on-resistance in the off operation. In this manner, abrupt current change can be suppressed in the switching operation, resulting in reducing di/dt noise derived from a parasitic inductor