Consider the emitter-follower amplifier shown in Figure P8.13.

(a) Assuming \(\beta \gg 1\), show that the small-signal voltage gain can be written in the form \(A_{v}=\frac{I_{C} R_{L}}{I_{C} R_{L}+V_{T}}=\frac{R_{L}}{R_{L}+\frac{1}{g_{m}}}\)

(b) If \(R_{L}=8 \Omega\), determine the minimum collector current that produces a small-signal voltage gain of (i) \(A_{v}=0.9\), (ii) \(A_{v}=0.95\), and (iii) \(A_{v}=0.9970\).

Transcribed Image Text:

Vio V+ lo V- Figure P8.13 w RL Vo