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Reg. No. Name:

B3E039S Pages: 2

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
THIRD SEMESTER B.TECH DEGREE EXAMINATION, JULY 2017

CS207: ELECTRONIC DEVICES AND CIRCUITS (CS)

Max. Marks: 100 Duration : 3 Hours.
PART A
Answer All questions.
1. Explain the following waveforms: (3)
a) Ramp
b) Step
c) Square
2. Draw and explain the circuit diagram for RC differentiator. (3)
3. Compare BJT and FET (3)
4. Explain Zener voltage regulators. (3)
PART B
Answer any 2 questions.
5. Explain the following with examples (9)

10.

a) clipper circuits.
2) clamper circuits.
With the neat sketches and waveforms explain Enhancement type N channel

MOSFET. (9)
With the neat sketch explain (9)

a) voltage doubler

b) voltage tripler

PART C
Answer All questions.

What is mean by operating point of a transistor? (3)
Explain about the effect of negative feedback on Bandwidth. (3)
What is the criterion for oscillation? (3)

. Draw the circuit diagram for bistable multivibrator and give a simple explanation?(3)

PART D
Answer any 2 questions.

. Explain voltage divider bias? (9)
. With a neat circuit diagram and relevant waveforms and equations, Explain and

analyze Hartley Oscillators. (9)

. Explain Monostable multivibrators with circuit and waveforms and obtain design

Equations. (9)

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