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High-precision Linear Amplifier Circuit

2017-03-03 19:51  
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High-precision Linear Amplifier Circuit
The circuit is used to detect sensor signal. The circuit consists of bridge, operational amplifier A1, bridge voltage supply amplifier A2,A3. The output voltage UR,UR' of A2,A3 have the same value and opposite phases. Their values are decided by the base voltage UR and output voltage UO. In the bridge, (1+δ)R4 stands for the resistance value of the temperature sensor. δ is the relative variable ratio.The circuit's linear distortion is not larger than 0.5%, which can be use as the temperature measurement interface in air data processing system. It can also be used to measure the non electrical quantity such as pressure, speed and flow rate.