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Posted By: CONFIDENCE IS THE COMPANION OF SUCCESS Member Level: Diamond Posted Date: 17 Apr 2008
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2007 Anna University B.E Electrical and Electronics ELECTRONIC CIRCUITS – I Question paper
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B.E/ B. TECH. DEGREE EXAMINATION, MAY / JUNE 2007
Third Semester
(Regulation 2004)
Electrical and Communication Engineering
EE 1203 ELECTRONIC CIRCUITS – I
(Common to B.E (Part Time) Second Semester
(Regulation 2005)
Time: three hours Maximum : 100 Marks
Answer ALL questions
PART A – ( 10 * 2= 20 Marks)
1. Draw the fixed bias and the self bias circuit.
2. Define the three stability factors.
3. Define the various h – parameters in a transistor.
4. Define CMRR in a differential amplifier?
5. What is Band width of an amplifier?
6. Define Rise time of an amplifier?
7. What is conversion efficiency in a power amplifier?
8. What is cross over distortion in a power amplifier?
9. Define the ripple factor for a Half wave and Full wave rectifier?
10. Draw the block diagram of a Switched Mode Power Supply.
PART B (5* 16 = 80 Marks)
11 (a). Derive equations for the three stability factors. (16)
Or
12 (a). Discuss in detail how the current gain, input impedance, voltage gain and output
Impedance of a transistor amplifier can be obtained using h – parameters. (16)
Or
(b) Discuss the operation of the emitter coupled differential amplifier. (16)
13.(a) Draw the hybrid P common emitter transistor model at high frequencies and
derive the values of all the components in terms of the h
parameters. (16)
Or
(b) Discuss the low frequency response and high frequency response of an amplifier.
(16)
14.(a) Discuss the transformer coupled audio power amplifier.
Or
(b) Discuss the class B push pull power amplifier. (16)
15.(a) Discuss in detail the electronically regulated D.C power supplies. (16)
Or
(b) Derive the ripple factor for the following types of filters:
(1) C
(2) L
(3) LC
(4) CLC
(4*4)
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