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:
Feb. 03, 2009
Filed:
Sep. 20, 2007
Masakiyo Horie, Gamagori, JP;
Masakiyo Horie, Gamagori, JP;
Denso Corporation, Kariya, JP;
Abstract
An A/D converter includes an A/D conversion circuit, a multiplying D/A converter, a switch circuit, and a control circuit. The control circuit prevents an A/D output of the A/D conversion circuit from being input to the D/A converter and controls the switch circuit so that an input voltage to be A/D-converted is recycled through the switch circuit and the multiplying D/A converter. As a result, the input voltage is amplified to a suitable level for A/D conversion. Then, the control circuit allows the A/D output to be inputted to the D/A converter and controls the switch circuit so that the amplified voltage is recycled through the switch circuit, the multiplying D/A converter, and the A/D conversion circuit. As a result, the amplified voltage is A/D-converted.