The transistor parameters in the ac equivalent circuit shown in Figure P6.74 are (beta_{1}=beta_{2}=100, V_{A 1}=V_{A 2}=infty,

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The transistor parameters in the ac equivalent circuit shown in Figure P6.74 are \(\beta_{1}=\beta_{2}=100, V_{A 1}=V_{A 2}=\infty, I_{C Q 1}=0.5 \mathrm{~mA}\), and \(I_{C Q 2}=2 \mathrm{~mA}\).

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(a) Find the small-signal voltage gain \(A_{v 1}=V_{o 1} / V_{i}\).

(b) Determine the small-signal voltage gain \(A_{v 2}=V_{o 2} / V_{o 1}\).

(c) Determine the overall small signal voltage gain \(A_{v}=V_{o 2} / V_{i}\).

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