For the Amplifier Circuit in Fig $V_{B E}=$ $0.7 \mathrm{~V}$ And $\beta=100$

For the amplifier circuit in Fig. 10.8.1


, assume that the BJT has $V_{B E}=$ $0.7 \mathrm{~V}$ and $\beta=100$ and neglect the Early effect.
(a) Find the dc bias current $I_{C}$ and the de collector voltage $V_{C}$ .
(b) Give the small-signal equivalent circuit together with values of all its components, utilizing the T model for the BJT.
(c) Find the input resistance $R_{\text {in }}$ .
(d) Find output resistance $R_{\text {out }}$ .
(e) Find the overall midband gain $V_{o} / V_{\text {sig. }}$ .
(f) Use the method of short-circuit time constants to obtain an estimate of the 3-dB frequency $f_{L}$ .

Correct Answer:

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Refer to Figure 10.8.1 below.



Fig...

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