Sunday, 27 April 2014

ELECTRONIC CIRCUITS IMPORTANT QUESTIONS For External Exams


ELECTRONIC CIRCUITS IMPORTANT QUESTIONS For External Exams


Unit I-V


1. Derive the stability factor for voltage divider bias
2. Describe how DC and AC load lines are drawn
3. What is meant by bias stability what are the factors affect the bias stability
4. Explain briefly about compensation technique
5. Discuss the operation of Differential amplifier
6. Analyze the small signal transistor amplifier in term of h parameter
7. Draw the hybrid model of CE configuration obtain its gain, input impedance compare the performance of this amplifier with CC&CB configuration
8. With small equivalent circuit of emitter follower derive its input impedance, Av , and output impedance
9. Draw the small signal model of FET and analyze source follower
10.Analyze Darlington type input impedance increasing method
11. Derive the Expression for Ai, Av, Ri, and Ro for CE amplifier using h parameter model
12.Explain the methods to improve the CMRR
13. Draw and explain class B push-pull power amplifier
14.Explain briefly about Total Harmonic distortion
15. Explain the power control method using SCR
16.Prove that maximum efficiency of class B power amplifier is 78.50%
17. Explian the working principle of class D amplifier what is its efficiency
18.Draw the block diagram of SMPS what are its advantage
19.Draw .the Hybrid (pie) model of transistor and derive the various parameters
20. Describe the working principle of full wave rectifier and derive the expression for the ripple factor ,rectifier efficiency,Vdc,Idc,Vrms,Irms?

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