EE252 BJT Assignment 2
Consider the circuit in the figure below. Assume the following parameters for the
transistor:
VBE = 0.7 V, VCC = 5 V, VEE = -5 V, hfe = 50, hie = 1 kΩ, hre = 2.5x10-4, hoe = 25
μA/V. You may make reasonable assumptions to simplify your analysis and state
all the assumptions clearly.
1.
Draw the DC equivalent circuit and find the Q-point of the circuit (VCEQ, ICQ).
2.
Draw the DC loadline and mark the Q-point on it.
3.
Draw the small signal h-parameter model of the circuit.
4.
Find the small signal input impedance 薠 芀 , output impedance 薠 , and voltage

V 
gain  Av  out  taking into consideration the loading effects of the load resistor
Vs 

and the source resistance.