For the circuit in Figure P6.54, the parameters are (V_{C C}=5 mathrm{~V}) and (R_{E}=500 Omega). The transistor

Question:

For the circuit in Figure P6.54, the parameters are $V_{C C}=5 \mathrm{~V}$ and $R_{E}=500 \Omega$. The transistor parameters are $\beta=120$ and $V_{A}=\infty$.

(a) Design the circuit to obtain a small-signal current gain of $A_{i}=i_{o} / i_{s}=10$ for $R_{L}=500 \Omega$. Find $R_{1}, R_{2}$, and also the small-signal output resistance $R_{o}$.

(b) Using the results of part (a), determine the current gain for $R_{L}=2 \mathrm{k} \Omega$.

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