Anna University Chennai 2006 B.E Electronic devices & circuits-I - Question Paper
Saturday, 23 February 2013 11:00Web
B.E./B.Tech. DEGREE EXAMINATION, May/June 2006
Annual trend 1st Year
(Regulation 2004)
Computer Science and Engineering
EC 1X11- ELECTRONIC DEVICES AND CIRCUITS
(Common to info Technology )
Time:Three hours Maximum:100 marks
ans all ques.
(PART A-10*2=20 marks)
!.What is intrinsic semiconductor? provide 2 examples.
2.What is meant by zener breakdown?
3.What are the biasing conditions to operate a transistor in active region?
4.What is thermal runaway?
5.List the merits and demerits of negative feedback.
6.Write the Barkhausen criterion condition for oscillator.
7.Draw the VI characteristics of DIAC.
8.What is an opto-isolator.
9.What is meant by precision rectifier?
10.Mention the ideal characteristics of op-amp.
(PART B-5*16=80 marks)
11.(a).Discuss the VI characteristics of P-N diode and zener Diode with their construction and principle of operation.
Or
(b).(i).Explain the operation of full wave rectifier with necessary wave forms.
(ii).With suitable circuit diagram, discuss the operation of positive clipper, negative clipper, positive clamper and negative clamper.
12.(a).Discuss the VI characteristics of any 2 kinds of MOSFET.
Or
(b).Determine the operating points of the subsequent circuit. Also obtain the stability factor if ß value of the silicon transistor is 50.
13.(a).Design a negative feed back amplifier with a feed back factor of 10%. Also obtain the number of stages needed to get a gain of 100 with feed back. presume the non feed back amplifier has a gain of 1000.
Or
(b).Write short notes on the following:
(i).Colpitts oscillator.
(ii).Bistable multivibrator
14.(a).Explain the VI characteristics of SCR and TRIAC.
Or
(b).Discuss the operation of LCD and solar cell in detail.
15.(a).With operational amplifier, discuss the operation of Wein bridge oscillator and low pass filter.
Or
(b).Explain the applications of op-amp with respect to the following:
(i).Non inverting amplifier
(ii).Integrator
(iii).Differentiator
| Earning: Approval pending. |
