The parameters for each transistor in the circuit shown in Figure P6.75 are \(\beta=100\) and \(V_{A}=\infty\).

(a) Determine the small-signal parameters \(g_{m}, r_{\pi}\), and \(r_{o}\) for both transistors.

(b) Determine the small-signal voltage gain \(A_{v 1}=v_{o 1} / v_{s}\), assuming \(v_{o 1}\) is connected to an open circuit, and determine the gain \(A_{v 2}=v_{o} / v_{o 1}\).

(c) Determine the overall small-signal voltage gain \(A_{v}=v_{o} / v_{s}\). Compare the overall gain with the product \(A_{v 1} \cdot A_{v 2}\), using the values calculated in part (b).

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US ww CCI R = 80 ww Vcc +10 V www RC = 2 Vol CC2 ww R3 = 85 ww R = 20 REI= CET Figure P6.75 R = 15 RC2= 4 HH RL= 4 RE2= 10.5 CE2