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Question 1 - For the transistor in the circuit shown in Figure, assume β = 120. Design the circuit such that ICQ = 0.15 mA and RTH = 200kΩ. What is the value of VCEQ? Question 2 - (a) For the circuit shown in figure, design a bias-stable circuit such that ICQ = 0.8mA and VCEQ = 5V. Let β = 100.

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

(c) Repeat parts (a) and (b) if RE = 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 RE, R1, and R2 such that the circuit is bias stable. Question 4 - For the circuit in figure, let β = 100 and RE = 3 kΩ. Design a bias-stable circuit such that VE = 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 IS = 5 x 10-16 A and β = 90. Determine VBB in each circuit such that VCE = 1.10V. Electrical & Electronics, Engineering

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