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:
Jun. 10, 2014
Applicant:
Panasonic Corporation, Osaka, JP;
Inventors:
Takuji Miki, Kyoto, JP;
Kazuo Matsukawa, Osaka, JP;
Takashi Morie, Osaka, JP;
Shiro Sakiyama, Kyoto, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/12 (2006.01); H03M 1/08 (2006.01); H03M 1/06 (2006.01); H03M 1/80 (2006.01); H03M 1/00 (2006.01); H03M 3/00 (2006.01); H03M 1/46 (2006.01);
U.S. Cl.
CPC ...
H03M 1/08 (2013.01); H03M 1/804 (2013.01); H03M 1/00 (2013.01); H03M 3/30 (2013.01); H03M 1/12 (2013.01); H03M 1/0641 (2013.01); H03M 1/466 (2013.01); H03M 1/468 (2013.01);
Abstract
In a successive approximation AD converter, a noise generator outputs the output of a ΔΣ modulator as a noise signal. A selector circuit can output the noise signal, in place of a digital signal for generating a comparison-target voltage for the next bit, to a capacitor element of a capacitance DAC. During sampling of an analog input voltage, the noise signal is supplied to the capacitance DAC via the selector circuit, and thereafter normal successive approximation operation is executed.