公开(公告)号：US20230184567A1

公开(公告)日：2023-06-15

申请号：US17863341

申请日：2022-07-12

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Lu-Po LIAO ,  Chin-Fu KUO ,  Liang-Ying LIU ,  Yu-Sheng LIN

IPC: G01D5/24 ,  G01R27/26

CPC classification number: G01D5/24 ,  G01R27/2605 ,  G01D18/00

Abstract: The differential capacitor device includes a differential capacitor sensing component, a calibration capacitor assembly and two output terminals. The differential capacitive sensing element has a common point terminal, a first non-common point terminal and a second non-common point terminal, and the common point terminal is configured to receive an input voltage. The calibration capacitor assembly has a first calibration capacitor and a second calibration capacitor, one terminal of the calibration capacitor assembly is coupled to the first non-common point terminal and the second non-common point terminal, and the other terminal of the calibration capacitor assembly is configured to receive a first calibration voltage and a second calibration voltage. The two output terminals are respectively coupled to the first non-common point terminal and the second non-common point terminal to output a first signal and a second signal.