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(20 x 2 = 40 MARKS)
ANSWER ALL QUESTIONS
1. What do you mean by faithful amplification?
2. What are the three operating region of BJT?
3. What are temperature dependent parameters in transistor?
4. What is thermal runaway?
5. Give four advantage of h - parameter method for analyzing transistor amplifier over other types.
6. Consider CE amplifier with fixed bias. If (B = 80,RB = 390 KQ, Rcl .5 KQ & Vcc =
30 V. Find the coordinates of Q-point.
7. What is the role of coupling network in multistage amplifier?
8. State Millers Theorem.
9. Draw the High frequency model of FET.
10. How the constant current circuit is used to improve the CMRR?
11. Draw the high frequency equivalent circuit for BJT amplifier.
12. Give the main reason for the drop in gain at the low frequency region and high frequency region. |
13. Compare the efficiency of class A, and class B amplifiers .
14. How are amplifiers classified based on the biasing condition?
15. How the conversation efficiency occurs?
16. How the crossover distortion occurs.
17.What is meant by ripple factor?
18. A full wave rectifier delivers 50 W to a load of 200 Q. If the ripple factor is 1 %. Calculate the A.C ripple voltage across the load.
19. Define line and load regulation.
20. Give any four advantages of SMPS.
PART -B
(5x12 = 60 MARKS)
ANSWER ANY FIVE QUESTIONS
21a. In the transistor amplifier shown in figure 1, RC=10KQ, Rb=1 KQ RL=24KQ and Vcc = 24 V. '
Draw the DC,AC load line and determine the optimum operating point. (6)
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Figure 1 |
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