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1. (WO2017177983) ALARM CIRCUIT OF GAS-SENSITIVE SENSOR

Pub. No.:    WO/2017/177983    International Application No.:    PCT/CN2017/080805
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Tue Apr 18 01:59:59 CEST 2017
IPC: G01N 27/12
Applicants: INSTITUTE OF PROCESS ENGINEERING, CHINESE ACADEMY OF SCIENCES
中国科学院过程工程研究所
Inventors: HAN, Ning
韩宁
WU, Xiaofeng
武晓峰
CHEN, Yunfa
陈运法
Title: ALARM CIRCUIT OF GAS-SENSITIVE SENSOR
Abstract:
A self-feedback circuit, comprising a gas-sensitive sensor and a voltage dividing circuit. The voltage dividing circuit comprises a field effect transistor (p-FET, n-FET). A gas-sensitive resistor (n-Rsensor) of the gas-sensitive sensor is in series connection with a source electrode (S) and a drain electrode (D) of the field effect transistor (p-FET, n-FET). An increased one between the divided voltage of the gas-sensitive resistor (n-Rsensor) and the divided voltage of the voltage dividing circuit is used as a voltage output (VOUT) of the self-feedback circuit.