Annamalai University 2007 B.Sc Electronics 710ELECTRONIC CIRCUITS - Question Paper

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Name of the Candidate :
7 one six 4

B.Sc. DEGREE EXAMINATION, 2007
( ELECTRONIC SCIENCE )
( 3rd YEAR )
( PART - III - A - MAIN )
( PAPER - III )
710. ELECTRONIC CIRCUITS
( Including Lateral Entry )
May ] [ Time : three Hours
Maximum : 100 Marks

PART - A (5 × four = 20)
ans any 5 ques..
All ques. carry equal marks.

1. discuss the fixed bias method of biasing a transistor.
2. find an expression for the gain with feedback.
3. What is a class - B amplifier ? Derive an expression for its efficiency.
4. What is a multi-vibrator ? elaborate its various kinds ?
5. define epitaxial growth.
6. Sketch the equivalent circuit of a base - diffused resistor.
7. find an expression for the gain of inverting OP-AMP.
8. How is an OP-AMP used as an integrator ?

PART - B (5 × 16 = 80)
ans any 5 ques..
All ques. carry equal marks

9. Draw the circuit of 2 stage RC coupled amplifier and discuss its frequency response.
10. discuss how a power FET is fabricated. Also, discuss its characteristics and advantages.
11. discuss the working of class - B push - pull amplifier and find an expression for its output power.
12. define the working of a Colpittís oscillator and derive an expression for its output frequency.
13. Draw the circuit of a Triangle - wave generator and discuss its working. Also, find an expression for its frequency.
14. How are transistors fabricated ? - discuss.
15. explain how an OP-AMP is used in an electronic analog computer to solve a differential formula.
16. discuss the working of logarithmic and antilogarithmic amplifiers. discuss how they are used for the multiplication of 2 analog voltages.

regards
sridevi

Earning:   Approval pending.