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 $f_{L}$.

Question

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 $f_{L}$.

Quizplus · Accepted Answer

The Answer of 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 $f_{L}$.

For the Amplifier Circuit in Fig VBE=V_{B E}=VBE​= 0.7 V0.7 \mathrm{~V}0.7 V And β=100\beta=100β=100

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