Invention Grant
- Patent Title: Switched capacitor amplifier circuit, voltage amplification method, and infrared sensor device
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Application No.: US17167434Application Date: 2021-02-04
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Publication No.: US11863132B2Publication Date: 2024-01-02
- Inventor: Koji Yabe
- Applicant: LAPIS Semiconductor Co., Ltd.
- Applicant Address: JP Yokohama
- Assignee: LAPIS SEMICONDUCTOR CO., LTD.
- Current Assignee: LAPIS SEMICONDUCTOR CO., LTD.
- Current Assignee Address: JP Yokohama
- Agency: Rabin & Berdo, P.C.
- Priority: JP 17093049 2017.05.09
- The original application number of the division: US15966608 2018.04.30
- Main IPC: H03F11/00
- IPC: H03F11/00 ; H03F3/00 ; G01K17/00 ; G01J5/34 ; G01J5/12 ; G01J5/14 ; H03F3/45 ; G01J1/46 ; H03G3/30
Abstract:
A switched capacitor amplifier circuit includes an operational amplifier, a first capacitor and a second capacitor each having one end connected to a negative input terminal of the operational amplifier, a first switching circuit configured to connect the other end of the first capacitor and a signal source during a first operation, a second switching circuit configured to connect the other end of the second capacitor and the output terminal of the operational amplifier so as to connect the output terminal and the negative input terminal of the operational amplifier through the second capacitor during the second operation, and an impedance converter circuit configured to convert an output impedance of the signal source into a specified impedance, the impedance converter circuit being connected between the first switching circuit and the other end of the first capacitor.
Public/Granted literature
- US20210159866A1 SWITCHED CAPACITOR AMPLIFIER CIRCUIT, VOLTAGE AMPLIFICATION METHOD, AND INFRARED SENSOR DEVICE Public/Granted day:2021-05-27
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