A kind of amplifying circuit for tiny signal for air quality electrochemical sensor

A kind of amplifying circuit for tiny signal for air quality electrochemical sensor

  • CN 205,720,085 U
  • Filed: 05/10/2016
  • Issued: 11/23/2016
  • Est. Priority Date: 05/10/2016
  • Status: Active Grant
First Claim
Patent Images

1. , for an amplifying circuit for tiny signal for air quality electrochemical sensor, its feature existsIn:

  • include air quality electrochemical sensor A1, field effect transistor Q1, operational amplifier U1A,Operational amplifier U1B, wave filter L1, operational amplifier U1C, Xiao Te diode D1;

    Wherein, electrochemical sensor A1 working electrode W is connected with operational amplifier U1A negative input end,The working electrode W of simultaneous electrochemical sensors A 1 is also connected with the source S of field effect transistor Q1,The reference electrode R of electrochemical sensor A1 is connected with the drain D of field effect transistor Q1;

    Operational amplifier U1A contacts operational amplifier U1B and operational amplifier U1C simultaneously, and computing is putThe outfan of big device U1C connects clamper Xiao Te diode D1, carries out clamper to amplifying signal,Described operational amplifier U1A, operational amplifier U1B and operational amplifier U1C constitute three grades of fortuneCalculate amplifying circuit.

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