(a) Derive the expression for the closed-loop voltage gain Aυ = υO /υI for the circuit shown in Figure P9.46. Assume an ideal op-amp. (b) Let R4 = 50kΩ and R3 = 25 kΩ. Determine R1 and R2 such that Aυ = 6, assuming the maximum resistor value is limited to 200 kΩ.
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