Download PTU B.Tech 2021 Jan Automation-And-Robotics 5th Sem 78215 Electronics Devices And Circuits Question Paper

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Roll No.                                                                                                                                                 Total No. of Pages : 02

Total No. of Questions : 18

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B.Tech. (Automation & Robotics) (Sem.-5)

ELECTRONICS DEVICES AND CIRCUITS

Subject Code : BTAR-501-18

M.Code : 78215

Time : 3 Hrs.                                                                                                                                                 Max. Marks : 60

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INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. 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 :

1. Define current gain, f₃, in CE configuration.
2. What is meant by Gate — Source threshold voltage of an FET?
3. What are the applications of switching regulators?
4. Write a short note on voltage follower!

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5. Define slew rate.
6. Draw pin diagram of IC 555 timer.
7. List any three advantages of A to D converter.
8. What is the importance of sample and hold circuits.
9. Discuss the need of multiplexer.

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10. Write a short note on VCO

SECTION-B

11. Describe the operation of common drain FET amplifier and derive the equation for voltage gain.
12. Write a brief note on binary ripple counters.
13. Draw circuit diagram of 555 timer for astable multivibrator. Explain its working.

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14. Explain the difference between the gated SR latch and gated D latch.
15. Draw circuit diagram of Schmitt trigger circuit and explain operation with input and output waveform.

SECTION-C

16. Explain and draw the structure of enhancement type MOSFET.
17. Explain precision half wave and full wave rectifiers in detail.

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18. Explain the working of mono stable multivibrator with its circuit diagram and output waveform.

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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