Download PTU B-Tech EEE 2020 Dec 3rd Sem 76382 Analog Electronics Question Paper

Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (EEE)- Electrical And Electronics Engineering 2020 December 3rd Sem 76382 Analog Electronics Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (EE) (2018 Batch) (Sem.?3)
ANALOG ELECTRONICS
Subject Code : BTEE-302-18
M.Code : 76382
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 :
1.
Give comparison of Avalanche and Zener break down of a diode.
2.
Define P-N junction diode. Also draw V-I characteristics of diode.
3.
Why the input impedance in MOSFET is very high in comparison with BJT?
4.
Why is an ordinary junction transistor is called bipolar transistor?
5.
Give two reasons why an open-loop op-amp is unsuitable for linear applications?
6.
What is the use of clipping circuits?
7.
Define input offset current, input bias current the electrical parameters of op-amp.
8.
What is the advantage of constant current sources over emitter bias in differential
amplifier?
9.
Define input offset voltage and explain why it exists in all op-amps?
10. "Sometimes a lamp is used in one of the resistance arms of Weirt bridge oscillator". Why?
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SECTION-B
11. Explain V-I characteristics and structure of MOSFET.
12. With circuit diagram and output characteristics explain a simple transistor amplifier in CB
configuration and write down the equation of DC load line.
13. What are the advantages of differential input and output amplifier? Briefly compare and
contrast two differential amplifier configurations.
14. Describe the principle of operation of a Wein bridge oscillator and give the condition for
sustained oscillation.
15. For the circuit shown in fig. (i) and fig. (ii) Find the maximum and minimum values of
Zener diode current.
5
5
k k
5k
I
IL
5 k
I
IL
IZ
IZ
80?120 V
80?120 V
10k
10k
50V
10 k
10 k
50V
FIG. (i)
FIG. (ii)
SECTION-C
16. Draw circuit of three transistor amplifier configurations using NPN transistor and explain
how a voltage amplification is achieved in CE configuration?
17. Explain difference between the integrator and differentiator and give one application of
each.
18. Write short notes on the following :
a) Phase shift oscillator
b) Clamping and clipping circuits
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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