Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (ECE)-Electronics And Communications Engineering 2020 December 4th Sem 77565 Analog Circuits Previous Question Paper
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (Electronics & Communication Engineering) (2018 Batch)
(Sem.?4)
ANALOG CIRCUITS
Subject Code : BTEC-401-18
M.Code : 77565
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Write briefly :
Q1. Define trans-conductance and drain resistance with respect to JFET.
Q2. Derive the relation between and with respect to BJT.
Q3. Draw hybrid small signal model for a transistor in CE configuration.
Q4. Draw the block diagram of Voltage Series feedback and Current Series feedback diagram.
Q5. The voltage gain of an amplifier without feedback is 3000. Calculate the voltage gain of the
amplifier if negative voltage feedback is introduced in the circuit. Given that feedback
fraction mv = 0.01.
Q6. What is the difference between amplifier and oscillator?
Q7. Write Barkhausen criterion for oscillators.
Q8. Why power amplifiers are called large signal amplifiers?
Q9. Explain the loading effect in amplifiers.
Q10. What are the different coupling schemes used in multistage amplifiers?
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SECTION-B
Q11. Draw the high frequency model of a CE transistor and explain each component of it.
Q12. Why does gain of amplifier falls off at low and high frequencies? Explain with an
appropriate diagram.
Q13. Describe the effect of feedback on gain and bandwidth.
Q14. Explain the working of RC phase shift oscillator and derive for its frequency of Oscillation.
Q15. What is harmonics distortion in power amplifier? Discuss the operation of a class B power
amplifier and derive its maximum power conversion efficiency.
SECTION-C
Q16. Draw and explain input and output characteristics of CB amplifier. Write any practical
application of CB amplifier.
Q17. Draw the circuit for Voltage shunt amplifier and justify the type of feedback. Derive the
expressions for Av, , Ri and Ro for the circuit.
Q18. Write short notes on the following :
a) Clapp Oscillators
b) Cascade Amplifiers
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 13 February 2021