The transistor parameters for the circuit in Figure P12.42 are: \(h_{F E}=50\), \(V_{B E}(\mathrm{on})=0.7 \mathrm{~V}\), and \(V_{A}=\infty\). Using nodal analysis, determine the closedloop small-signal voltage gain \(A_{v f}=v_{o} / v_{s}\) at the midband frequency.

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C = 5 F www 47 ww 150 www 4.7 Figure P12.42 +25 V 10 HH C= Q1 5 F www R www 47 www C3= 50 F www 33 4.7 = 100 4.7 C = 10 F Q2 ww C6= 5 F C = 50 FR = 4.7