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:
Nov. 09, 2010
Filed:
May. 18, 2009
Hideki Kabune, Nagoya, JP;
Nobuhiko Makino, Anjo, JP;
Tomoharu Hayakawa, Kasugai, JP;
Hitoshi Ishikawa, Tokyo, JP;
Tatsuya Aizawa, Tokyo, JP;
Shigeo Uno, Tokyo, JP;
Masamitsu Ozeki, Tokyo, JP;
Hideki Kabune, Nagoya, JP;
Nobuhiko Makino, Anjo, JP;
Tomoharu Hayakawa, Kasugai, JP;
Hitoshi Ishikawa, Tokyo, JP;
Tatsuya Aizawa, Tokyo, JP;
Shigeo Uno, Tokyo, JP;
Masamitsu Ozeki, Tokyo, JP;
Denso Corporation, Kariya, JP;
Abstract
An AD converter includes an input circuit, an operation circuit and a bus interface. The input circuit is provided with a pull-down circuit, which is capable of pulling down an analog signal input side of a sample-hold circuit whether an analog signal is inputted or not. The operation circuit is provided with a reference voltage conversion result storing register, which is capable of storing a conversion result of an analog reference voltage inputted periodically separately from a conversion result of the analog signal inputted through the sample-hold circuit. The operation circuit is further provided with a check register, which is capable of writing in and reading out data for checking operation of a signal transfer system including a bus interface through the bus interface. Thus, it is made possible to confirm normality of an external part and an internal part of the AD converter.