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| Roll No. | Total No. of Pages : 02 |
| Total No. of Questions : 09 |
B.Tech.(Electronics Engg.) (2012 Onwards)
B.Tech.(ECE)/(Electronics & Computer Engg.)/(ETE) (2011 Onwards)
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(Sem.-3)ANALOG DEVICES & CIRCUITS
Subject Code : BTEC-301
M.Code: 57583
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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Q1. Write briefly :
- Explain how Zener diode can be used as a voltage regulator.
- What is the principle behind the working of an oscillator?
- Explain the working of a transistor as a switch.
- What do you mean by dc load line?
- Give the V-I characteristics of PN diode.
- Calculate Ic and IE for a transistor that has adc = 0.99 and IB = 150µA. Determine the value of ?de for the transistor.
- Define Transconductance of MOSFET.
- What is pinch off voltage?
- State Barkhausen criteria for oscillators.
- What is diffusion capacitance?
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SECTION-B
Q2. Explain the effect of using negative feedback on various parameters of amplifiers.
Q3. What are h-parameters? Explain how these are used for making equivalent transistor model.
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Q4. Discuss the factors involved in the selection of Ic, Re and Rc for a single stage common emitter BJT amplifier circuit, using voltage divider bias.
Q5. Explain in detail with diagrams, the difference between LED and Photo-diodes.
Q6. Explain construction, operation and characteristics of JFETs.
SECTION-C
Q7. Explain the construction and working of MOSFET.
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Q8. Explain the working of Colpitts oscillator. Derive the expression for its frequency.
Q9. Describe in detail with diagram and characteristics.
- UJT
- RC phase shift oscillator.
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 3rd Semester Last 10 Years 2011-2021 Previous Question Papers|| Punjab Technical University
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