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The equipment amplifier with the function of expanding commo

2015-01-02 16:44  
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The equipment amplifier with the function of expanding common mode range
In the figure is the equipment amplifier with the function of expanding common mode range. In the circuit, A1, A2 and A4 are composed of the high-precision equipment amplifier INA10 or INA102. Seeing from the figure, the magnifying multiple of A1, A2 and A3 is 100, the rear stage amplifier is a high-precision unit gain amplifier INA105, the connection method of the amplifier is non-inverting input and follower output, i.e the 4 resistors in the circuit are in parallel connection respectively. In figure (b) is the internal structure of INA101.