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:
Jul. 07, 2015
Filed:
Oct. 06, 2014
Renesas Electronics Corporation, Kanagawa, JP;
Masumi Kon, Kanagawa, JP;
Jou Kudou, Kanagawa, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
To suppress detection accuracy of a measurement resistance from decreasing by an on-resistance of a selector switch. The selector switch is provided between a first node coupled to a first voltage through a reference resistance and multiple second nodes coupled to the second voltage through measurement resistances, and selects the second node to be coupled to the first node with the selector switch. A correction circuit generates a voltage obtained by adding the second voltage to a voltage between the second node and the first node as a correction voltage. A double integral ADC finds a first integral time elapsed when a difference voltage of the correction voltage to a voltage of the first node is integrated to the first voltage and a second integral time elapsed when the difference voltage of the first voltage to the voltage of the first node is integrated to the correction voltage.