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

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 Colpitt.s 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.

Earning:   Approval pending.