Consider the instrumentation amplifier of Fig. 2.20(b) with a common-mode input voltage of +5 V
(dc) and a differential input signal of 10-mV-peak sine wave. Let (2R1) = 1 kΩ, R2 = 0.5 MΩ, and
R3 = R4 = 10 kΩ. Find the voltage at every node in the circuit. maximum available gain is limited.