For the circuit shown in Figure 1, the transistor parameters are β = 100 and V A = ∞. Design the circuit such that I CQ = 0.25 mA and V CEQ = 3 V. Find the small-signal voltage gain A v = v o / v s . Find the input resistance seen by the signal source v s .

The transistor in the circuit in Figure 4 has a dc current gain of β= 100. (a) Determine the small-signal voltage gain A v = v o / v s . (b) Find the input and output resistances R i and R o .

The transistor parameters for the circuit in Figure 5 are β= 180 and V A = ∞. (a) Find I CQ and V CEQ . (b) Calculate the small-signal voltage gain. (c) Determine the input and output resistances R ib and R o .

Find Zo by yourself and put it in next homework