Using the model of Fig. 5.16, determine the following for a common-emitter amplifier if β...

Using the model of Fig. 5.16, determine the following for a common-emitter amplifier if β = 80, I_E(dc) = 2 mA, and r_o = 40 kΩ.

a. Zi.

b. I_b.

c. A_i = I_o/I_i = I_L /I_b if R_L = 1.2 kΩ.

d. A_v if R_L = 1.2 kΩ.

FIG. 5.16 r_e model for the common-emitter transistor configuration including effects of r_o.