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High-precision linear amplifier circuit composed of F007

2015-01-02 18:58  
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High-precision linear amplifier circuit composed of F007
High-precision linear amplifier circuit is used for sensing signal detection. It is shown as above. The high-precision linear amplifier circuit is composed of three parts, electric bridge, op amp amplifiers Al and supply amplifier A2 and A3. The output value of A2 and A3 are equal, the phases are contrast, its size depends on the reference voltage VR and the output voltage Vo. The (1 + δ)R4 in the bridge shows the resistance change value of the temperature sensor. The linear distortion of the circuit is not more than 0.5%, it can be used for the temperature measurement interface of the air data processing system, it can be used as the non-power measurement of pressure, speed, flow etc.