Figure P6.40 shows the ac equivalent circuit of an emitter follower. (a) The transistor parameters are (beta=120)

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Figure P6.40 shows the ac equivalent circuit of an emitter follower.

(a) The transistor parameters are \(\beta=120\) and \(V_{A}=\infty\). For \(R_{E}=500 \Omega\), determine \(I_{C Q}\) such that the small-signal voltage gain is \(A_{v}=0.92\).

(b) Using the results of part (a), determine the voltage gain if \(V_{A}=20 \mathrm{~V}\).

(c) Determine the small-signal output resistance \(R_{o}\) for both parts (a) and (b).

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