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. 18, 2007
Filed:
Aug. 19, 2005
Satoru Shigeta, Hitachinaka, JP;
Shinichi Fujino, Mito, JP;
Keita Hashimoto, Hitachinaka, JP;
Sadashi Seto, Hitachinaka, JP;
Satoru Shigeta, Hitachinaka, JP;
Shinichi Fujino, Mito, JP;
Keita Hashimoto, Hitachinaka, JP;
Sadashi Seto, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A current sensing device for sensing current flowing through a MOSFET has a voltage divider circuit composed of a series circuit of a first resistor and a second resistor having different resistance temperature coefficients, with a voltage division ratio designed to change depending on temperature. The sensing device is connected between a source and a drain of said MOSFET. A sensing circuit takes out the source-to-drain voltage divided with the voltage divider to sense the current flowing through the MOSFET.