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:
Sep. 09, 2008
Filed:
Dec. 03, 2002
Kiyokatsu Satoh, Saitama, JP;
Yasuo Kurosu, Saitama, JP;
Kiyokatsu Satoh, Saitama, JP;
Yasuo Kurosu, Saitama, JP;
Sanken Electric Co., Ltd., Saitama, JP;
Abstract
By switching the NMOS () on and off, a drive current passes through a solenoid (). The drive current passes through a conversion circuit (), and an amplifier circuit () outputs a current detection result by amplifying the output voltage of the conversion circuit (). Because a plurality of resistor elements (ton) that constitute the conversion circuit (), together with elements that constitute the amplifier circuit () are formed diffused to a semiconductor substrate (), even if the attribute changes by the conversion circuit () generating heat, by the drive current, the amplifier circuit () becomes approximately the same temperature, and the attribute changes. Therefore, a highly accurate current detection becomes possible without using components for temperature correction.