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. 10, 2024

Filed:

Oct. 13, 2022
Applicants:

Gwanak Analog Co., Ltd., Seoul, KR;

Seoul National University R&db Foundation, Seoul, KR;

Inventors:

Minsung Kim, Gwacheon-si, KR;

Suhwan Kim, Seoul, KR;

Hyunjoong Lee, Daejeon, KR;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 27/26 (2006.01); H03F 3/45 (2006.01); G01D 5/24 (2006.01);
U.S. Cl.
CPC ...
G01R 27/2605 (2013.01); H03F 3/45475 (2013.01); G01D 5/24 (2013.01); H03F 2203/45116 (2013.01);
Abstract

A read-out circuit includes an operational amplifier configured to receive input voltage via a positive input terminal; a feedback capacitor connected between an output terminal of the operational amplifier and a negative input terminal of the operational amplifier; a sensor charging/discharging circuit configured to charge or to discharge a sensor capacitor included in a sensor during a first time; and a switching circuit configured to connect the sensor capacitor and the operational amplifier during a second time after the sensor capacitor is charged or discharged.


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