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. 06, 2007
Filed:
Feb. 24, 2004
Applicants:
Seiichi Yamamoto, Kyoto, JP;
Norihiro Maeda, Kyoto, JP;
Toyokazu Ueda, Kyoto, JP;
Inventors:
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 17/687 (2006.01);
U.S. Cl.
CPC ...
Abstract
The drain of a power transistor Mis connected to the non-inverting input terminal of an operational amplifier A and the drain of a transistor Mis connected to the inverting input terminal of the operational amplifier A to make substantially equal the drain voltages of the power transistor Mand the transistor M, of which the gates are connected together and of which the sources are connected together. The drain current of the transistor Mis outputted via a detection terminalas a current signal proportional to the drain current of the power transistor M