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Posted Date: 18 Aug 2009 Posted By: Lora Member Level: Gold
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2007 Mahatma Gandhi University B.Tech Computer Science Engineering Solid State Electronics Question paper
B.TECH DEGREE EXAMINATION, JULY / AUGUST 2007
Third Semester
Branch: Computer Science / Information Technology
SOLID STATE ELECTRONICS – (R.T)
(Improvement/ Supplementury)
Time: Three Hours Maximum: 100 Marks
Answer all questions
Part A
1. Explain the need of biasing
2. What are the features of emitter follower configuration?
3. Define (i) Saturation voltage; (ii) Pinch-off voltage and (iii) Threshold voltage of JFET.
4. What are the advantages of MOSFET over JFET?
5. What are the conditions for oscillation of a circuit?
6. Compare the characteristics of LC oscillators.
7. Draw and explain the circuit of a slicer.
8. What are the characteristics of Bootstrap sweep generator?
9. What is meant by regulated power supply?
10. Discuss the basic concepts of opto coupler.
(10 X 4 = 40 Marks)
Part B
11.(a) What are the different methods of cascading transistors? Explain each with necessary figures. (12 marks)
(b) Explain with diagrams the frequency response of an RC coupled amplifier. What are the effects of cascading on frequency response? (12 marks)
12. (a) Draw and explain the circuit of an FET amplifier. Discuss its transfer characteristics. (8 marks)
(b) Differentiate between depletion and enhancement type MOSFETS. (4 marks)
(Or)
12. (c) Explain with diagrams the biasing techniques of MOSFET. (8 marks)
(d) What are the precautions to be taken while handling MOSFETS? (4 marks)
13. (a) Explain with figures the principle of operation of Wienbridge Oscillator. What is its frequency of oscillation. (12 marks)
(Or)
(b) Draw and explain the circuit of Hartley oscillator. What is its frequency of oscillation? (12 marks)
14. (a) Explain with diagrams and waveforms the principle of operation of an astable multivibration. (12 marks)
(Or)
(b) Explain with diagrams and waveforms the principle of operation Bootstrap sweep generator. (12 marks)
15. (a) Explain with figures the principles of operation of (i) photodiode and (ii) phototransistor. (12 marks)
(Or)
(b) Explain with diagrams the principle of operation of UJT. What are its applications? (12 marks)
[5 X 12 = 60 marks]
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