Manipal University 2007 B.E Biomedical Engineering THIRD SEMESTER MAKEUP S – - Question Paper
THIRD SEMESTER B.E. DEGREE MAKEUP exams – JANUARY 2007
SUBJECT: ELECTRONIC DEVICES & CIRCUITS (BME 201 )
CT$TT5T 91 gi
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Reg. No. |
MANIPAL INSTITUTE OF TECHNOLOGY
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INSPIRED BY LIFE
(A Constituent Institute of MAHE - Deemed University) Manipal - 576 104
THIRD SEMESTER B.E. DEGREE MAKEUP EXAMINATIONS - JANUARY 2007
SUBJECT: ELECTRONIC DEVICES & CIRCUITS (BME 201 )
(REVISED CREDIT SYSTEM)
Friday, January 05, 2007: 9.00 a.m.- 12.00 noon TIME: 3 HOURS MAX. MARKS: 100
Instructions to Candidates:
1. Answer any FIVE full questions.
2. Draw labeled diagram wherever necessary_
1. (a (b (c
08
06
06
5x2=10
10
06
08
06
08
08
04
07
(a
(b
(a
(b
(c
(a
(b
(c
(a
2.
3
4.
With a neat diagram explain junction behavior of diode
Explain various current components of diode
Explain working principle of Zener diode and list its applications.
Write short notes on:
(i) UJT , (ii) LED
Draw a neat diagram of n-channel type JFET. Explain its operation with drain and transfer characteristics.
Explain how phototransistor is different than BJT. List its two applications
What is photolithography? Explain various steps in the fabrication of Integrated Circuits.
Write an ac equivalent model of JFET in fixed biased configuration. Calculate Zi, Zo and Av(with and without effect of rd)
Draw the circuit of a common base npn-transistor. Plot the input and output characteristics and explain
For the circuit shown in the fig Q.4b, transistors Q1 and Q2 operate in the active region with VBE1=VBE2=0.7V,01=100,
P2=50Jco=0. Find IB25I 1 ,I2,IC2,IB1 ,IC1 ,IE1,vo1,vo2.
Discuss on cutoff region of a transistor
Discuss on fixed bias and thermal stabilization of transistor
(b) A Ge transistor is used in the self biasing arrangement with VCC=16V,RC=1.5K and VBE active=0.2V.The quiescent point is 07 chosen to be VCE=8V and IC=4mA.A stability factor S= 12 is
desired .If P = 50,find R1;R2 and RE
(c) Draw the hybrid-n model of a npn transistor in the CE 06 configuration. Discuss on the circuit components
6. (a) For the amplifier shown in the fig Q.6a, compute AI =Io/Ii, Av, 08 Avs, Ri, and Ri1 .Given hfe=50,hie=1.1K,hre=hoe=0.
(b) Discuss on :
(i) High input impedance buffer amplifier
6+6=12
(ii) Bias compensation circuits
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Vcc Vcc=24V I |
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I-ig Q.4b l ig Q.6a |
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| Earning: Approval pending. |
