Title:
SENSOR SIGNAL PROCESSING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2022/105643
Kind Code:
A1
Abstract:
A sensor signal processing circuit, comprising an inverting amplifier and a transconductance amplifier, which are connected to an output end of a sensor circuit. By using a combined action of a time constant amplified by the inverting amplifier and negative feedback and retrogradation generated by the transconductance amplifier, negative feedback is carried out in a way in which the voltage of a negative input end of the inverting amplifier reaches a Vref voltage of a positive input end, such that a time drift and a temperature drift of a sensor are eliminated. In the present invention, a capacitance value configured on a feedback path is minimized by means of a subsequent time constant amplification function, and therefore, by using a ceramic capacitor in which an evaporation phenomenon does not occur, the elimination of a capacitance value of the capacitor is avoided.
Inventors:
SONG JUN (CN)
ZHONGCUN ZHEFU (CN)
ZHONGCUN ZHEFU (CN)
Application Number:
PCT/CN2021/129515
Publication Date:
May 27, 2022
Filing Date:
November 09, 2021
Export Citation:
Assignee:
SUZHOU SENSOR MICROELECTRONICS TECH CO LTD (CN)
International Classes:
H03F3/45; H03F1/34
Foreign References:
| CN112491369A | 2021-03-12 | |||
| US20170359036A1 | 2017-12-14 | |||
| CN101807891A | 2010-08-18 | |||
| CN103905037A | 2014-07-02 |
Attorney, Agent or Firm:
BEIJING SHENGFENG LAW FIRM (CN)
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