PEC EPE Biomedical

Practice session

In a standard three-op-amp instrumentation amplifier (INA) circuit, the input stage consists of two non-inverting op-amps cross-coupled by gain resistor RG and two feedback resistors R1 = 50 kOhm. The second stage is a difference amplifier with equal resistors R2 = R3 = 100 kOhm. To achieve an overall differential gain (Ad) of exactly 50, what value of RG must be selected?

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