Manipal University 2008 B.E Biomedical Engineering SUMMER/ MAKE UP S - Question Paper
THIRD SEMESTER B.E. DEGREE SUMMER/ MAKE UP exams JULY 2008
SUBJECT: ELECTRONIC DEVICES & CIRCUITS (BME 201 )
MANIPAL INSTITUTE OF TECHNOLOGY
(A Constituent Institute of Manipal University)
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Manipal - 576 104
THIRD SEMESTER B.E. DEGREE SUMMER/ MAKE UP EXAMINATIONS JULY 2008
SUBJECT: ELECTRONIC DEVICES & CIRCUITS (BME 201 ) (REVISED CREDIT SYSTEM)
Monday, July 28, 2008: 2.00 - 5.00 p.m
MAX. MARKS: 100
TIME: 3 HOURS
Instructions to Candidates:
1. Answer any FIVE full questions.
2. Draw labeled diagram wherever necessary_
1 (a) With V-I Characteristics explain the operation of a pn diode. Write the current equation. Also find the diode current if a forward bias of
08
07
05
10
10
10
10
0.7 Volt is applied to a silicon diode having a maximum reverse saturation current of 100 nano ampere.
(b) Explain the operation of a SCR with its V-I characteristics and mention its applications.
(c) Explain the operation of a photo diode with its characteristics.
Mention its applications.
2. (a) Draw a common emitter npn transistor circuit. Draw its input and output characteristics and explain all the operating regions. Also derive the relation of collector current in active region.
(b) Draw a neat diagram of n-channel enhancement type MOSFET and explain its operation with drain and transfer characteristics.
3 (a) Draw the circuit of a UJT and draw its V-I characteristics and explain. Also give a application of UJT and explain.
(b) Explain the various steps observed in the fabrication of Integrated Circuits. List its advantages.
4. (a) Draw the circuit of a common source FET amplifier with source
resistance. Draw its small signal model and derive the relation of the voltage gain.
silicon transistor is in cutoff, saturation or in active region and find Vo.
(ii) find minimum value of emitter resistor RE for which the transistor operates in the active region.
5. (a) Derive the relations of the stability factors S and S1 of a self biased 08
transistor circuit.
(b) Write a note on zener diode 06
(c) Write a note on bias compensation in transistor circuits. 06
6. (a) Draw a single stage CE transistor amplifier circuit. Draw its 10
h-parameter model. Derive the relations of various gains, input and out impedances.
(b) Draw a hybrid-n model of a transistor in the CE configuration and 10 discuss on the circuit components.
Figures
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| Earning: Approval pending. |
