GATE ECE 1999 | Question 6

Question

A bipolar junction transistor amplifier circuit is shown in the figure is Assume that the current source $\text{I}_{\text {bias}}$ is ideal, and the transistor has vary large $b, r_{b}=0$, and $r_{0} \rightarrow \infty$.

Determine the $\text{ac}$ small-signal midband voltage gain $\left(V_{0} / V_{s}\right)$, input resistance $\left(R_{i}\right)$, and output resistance $\left(R_{u}\right)$ of the circuit. Assume $V_{T}=26 \; \mathrm{mV}$