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:
Apr. 29, 2014
Filed:
Mar. 19, 2012
Tetsuya Makihara, Nukata-gun, JP;
Tetsuya Makihara, Nukata-gun, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A voltage detection apparatus includes an operational amplifier, first and second switches coupled between a terminal of a detection target voltage source and a common node, a first capacitor including a plurality of capacitor elements coupled in series between the common node and an inverting input terminal of the operational amplifier, a third switch and a second capacitor, which are coupled between the inverting input terminal and an output terminal of the operational amplifier, a reference voltage selection circuit which applies one of a first reference voltage and a second reference voltage differing from one another to a non-inverting input terminal of the operational amplifier, and a controller which is capable of selecting a voltage detection mode and a self-diagnostic mode.