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:
Aug. 19, 2008
Filed:
Jan. 31, 2007
Applicant:
Shigeto Kobayashi, Gifu, JP;
Inventor:
Shigeto Kobayashi, Gifu, JP;
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
An A-D converter includes an A-D converter circuit, a D-A converter circuit, a subtraction circuit, a second amplifier circuit, a reference voltage control circuit, a timing control circuit, an amplifier control circuit, and an output circuit. The reference voltage control circuit controls the range of reference voltage in the A-D converter according to a step or stage of conversion in the A-D converter. In particular, the reference voltage control circuit performs a control so that the range of reference voltage in the A-D converter circuit at the time of conversion in the third step is larger than that in the first and the second step.