# AU R2004 EC1261 Electronic circuits May June 2014 Question Paper

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Question Paper Code : 53375
B.E./B.Tech. DEGREE EXAMINATION, MAY/JUNE 2014.
Fourth Semester
Electrical and Electronics Engineering
EC 1261 — ELECTRONIC CIRCUITS
(Common to Third Semester; Electronics and Instrumentation Engineering and Instrumentation and Control Engineering)
(Regulation 2004/2007)
(Common to B.E. (Part-Time) Third Semester,l Electrical and Electronics
Time : Three hours
Engineering, Regulation 2005)
Maximum : 100 marks

Answer ALL questions.
PART A (10 x 2 20 marks)
1.What is the necessary for biasing in BJT amplifiers?
2.A class A amplifier has zero signal power dissipation of 20 watts. If the ac output power is 5w, find collector efficiency.
3.Define CMRR.
4.Draw the frequency response of single tuned amplifier. .
5.An amplifier has gain of 2000. If feedback ratio is 0.04, find the voltage gain of
amplifier with negative feedback.
6.Give the significance of Barkhausen criterion.
7.How does hysterisis loop in a circuit stables the operation of Schmitt trigger?
8.Determine the period and frequency of oscillation for an astable multivibrator with component values R1= 2 kilo ohm, RF = 20 kilo ohm, C1 =  0.01 mu F, C2 = 0:05 mu F.
9.Give the operation of series voltage regulator.
10. A halfwave. diode rectifier has Vi = 100 sinwt and RL = 900 ohm. Calculate peak load current and dc load current.

Full Name :Arumugam.P
College Name :SNS College of Technology
Department :EEE
Semester :04
Subject Code :EC1261
Subject Name :Electronic circuits
Study Material Description :QP

Attachment :

EC MJ2014 QP.pdf (Size: 1.28 MB / Downloads: 139)
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