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Roll No. Total No. of Pages : 02
Total No. of Questions : 18
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B.Tech. (EE) (2018 Batch) (Sem.-3)ANALOG ELECTRONICS
Subject Code : BTEE-302-18
M.Code : 76382
Time : 3 Hrs. Max. Marks : 60
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INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
SECTION-A
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Write briefly :
- Give comparison of Avalanche and Zener break down of a diode.
- Define P-N junction diode. Also draw V-I characteristics of diode.
- Why the input impedance in MOSFET is very high in comparison with BJT?
- Why is an ordinary junction transistor is called bipolar transistor?
- Give two reasons why an open-loop op-amp is unsuitable for linear applications?
- What is the use of clipping circuits?
- Define input offset current, input bias current the electrical parameters of op-amp.
- What is the advantage of constant current sources over emitter bias in differential amplifier?
- Define input offset voltage and explain why it exists in all op-amps?
- “Sometimes a lamp is used in one of the resistance arms of Weirt bridge oscillator’. Why?
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SECTION-B
- Explain V-I characteristics and structure of MOSFET.
- With circuit diagram and output characteristics explain a simple transistor amplifier in CB configuration and write down the equation of DC load line.
- What are the advantages of differential input and output amplifier? Briefly compare and contrast two differential amplifier configurations.
- Describe the principle of operation of a Wein bridge oscillator and give the condition for sustained oscillation.
- For the circuit shown in fig. (i) and fig. (ii) Find the maximum and minimum values of Zener diode current.
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5kO I sk
VWV <+ - VWV <+
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—I
vz Iz
L L
80-120 V
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L/;—"2/80—120V T sov EIOk /?:E/' T sov §10k
Lo [
FIG. (i) FIG. (ii)
SECTION-C
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- Draw circuit of three transistor amplifier configurations using NPN transistor and explain how a voltage amplification is achieved in CE configuration?
- Explain difference between the integrator and differentiator and give one application of each.
- Write short notes on the following :
- Phase shift oscillator
- Clamping and clipping circuits
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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 download link is referred from the post: PTU B.Tech Question Papers 2020 December (All Branches)