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.

Date of Patent:
Sep. 27, 2016

Filed:

Mar. 11, 2013
Applicant:

Panasonic Corporation, Osaka, JP;

Inventor:

Takeshi Uemura, Osaka, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 1/00 (2006.01); H03F 1/26 (2006.01); G01C 19/5614 (2012.01); H01L 41/04 (2006.01); H01L 41/113 (2006.01); H03F 1/34 (2006.01); H03F 3/45 (2006.01); G01P 15/02 (2013.01); H02M 11/00 (2006.01);
U.S. Cl.
CPC ...
H03F 1/26 (2013.01); G01C 19/5614 (2013.01); G01P 15/02 (2013.01); H01L 41/042 (2013.01); H01L 41/1132 (2013.01); H02M 11/00 (2013.01); H03F 1/34 (2013.01); H03F 3/45179 (2013.01); H03F 3/45183 (2013.01); H03F 3/45475 (2013.01); H03F 2003/45008 (2013.01); H03F 2200/261 (2013.01); H03F 2200/372 (2013.01); H03F 2203/45032 (2013.01); H03F 2203/45116 (2013.01); H03F 2203/45528 (2013.01); H03F 2203/45674 (2013.01);
Abstract

An IV converter includes a first operational amplifier connected to the capacitive component, a second operational amplifier connected to the first operational amplifier, and an impedance element connected to the second operational amplifier. The first operational amplifier includes a first input terminal connected to the capacitive component, a second input terminal connected to a reference potential, and first and second output terminals. The first output terminal is connected to the first input terminal to constitute a feedback loop. The second operational amplifier includes a third input terminal connected to the second output terminal, a fourth input terminal connected to a reference potential, and a third output terminal connected to the third input terminal via the impedance element to constitute a feedback loop. The phases of the currents output by the first and second output terminals of the first operational amplifier are substantially identical to each other.


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