The parameters of the op-amp in the circuit shown in Figure P12.35 are (A_{v}=10^{5}, R_{i}=30 mathrm{k} Omega),

Question:

The parameters of the op-amp in the circuit shown in Figure P12.35 are $A_{v}=10^{5}, R_{i}=30 \mathrm{k} \Omega$, and $R_{o}=500 \Omega$. The transistor parameters are $h_{F E}=140$ and $V_{A}=\infty$. Assume that $v_{O}=0$ at the quiescent point. Determine

(a) $A_{v f}$,

(b) $R_{i f}$, and

(c) $R_{o f}$.

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