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:
Jan. 29, 2008
Filed:
Aug. 02, 2005
Takashi Ryu, Kyoto, JP;
Takuya Ishii, Osaka, JP;
Mikio Motomori, Hirakata, JP;
Hirohisa Tanabe, Nagaokakyo, JP;
Tomoya Shigemi, Takatsuki, JP;
Takashi Ryu, Kyoto, JP;
Takuya Ishii, Osaka, JP;
Mikio Motomori, Hirakata, JP;
Hirohisa Tanabe, Nagaokakyo, JP;
Tomoya Shigemi, Takatsuki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A current detection circuit of the present invention has a switching device; an auxiliary switching device; an offset voltage source comprising an offset resistor deviceand a current source circuit; a compensation circuit, comprising a differential amplifierand a compensation transistor, for adjusting the output current of the auxiliary switching deviceso that the potential obtained by subtracting the voltage drop across the offset resistor devicefrom the output potential of the switching deviceis equal to the output potential of the auxiliary switching device, being configured that the detection level of the current flowing in the switching deviceis shifted by an offset amount.