Consider the ideal inverting op-amp circuit with T-network in Figure 9.12.

(a) Design the circuit such that the input resistance is \(500 \mathrm{k} \Omega\) and the gain is \(A_{v}=-80\). Do not use resistor values greater than \(500 \mathrm{k} \Omega\).

(b) For the design in part (a), determine the current in each resistor if \(v_{I}=-0.05 \mathrm{~V}\).

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iz www ww R R3 RA R ww (2) v=0 + Figure 9.12 Inverting op-amp with T-network