Question 4 - for the circuit in figure let 100 and re 3

Question

Question 1 - For the transistor in the circuit shown in Figure, assume β = 120. Design the circuit such that I_CQ = 0.15 mA and R_TH = 200kΩ. What is the value of V_CEQ?

Question 2 - (a) For the circuit shown in figure, design a bias-stable circuit such that I_CQ = 0.8mA and V_CEQ = 5V. Let β = 100.

(b) Using the result of part (a), determine the percentage change in I_CQ if β is in the range 75 ≤ β ≤ 150.

(c) Repeat parts (a) and (b) if R_E = 1 kΩ.

Question 3 - The dc load line and Q-point of the circuit in figure (a) are shown in figure (b). For the transistor, β = 120. Find R_E, R₁, and R₂ such that the circuit is bias stable.

Question 4 - For the circuit in figure, let β = 100 and R_E = 3 kΩ. Design a bias-stable circuit such that V_E = 0.

Question 5 - Using a computer simulation, verify the result of given Example -

Consider the two circuits in figure. The parameters of each transistor are I_S = 5 x 10^-16 A and β = 90. Determine V_BB in each circuit such that V_CE = 1.10V.