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The high precision and impedance device amplifier composed o

2015-01-04 17:05  
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The high precision and impedance device amplifier composed of OPA2111
In the figure is the high precision and impedance device amplifier composed of OPA2111. The voltage of the figured circuit can be magnified to Av=10*(1+2R2/R1)=1000. The rear stage is fixed with a difference amplifier circuit whose gain is 10 times, which can expand the input common mode voltage range to ±10V.