EC6202 Electronic Devices and Circuits Important Questions
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Anna University Exams Nov / Dec 2017 – Regulation 2013
Important Questions – 3rd Semester BE/BTECH
EC6202 Electronic Devices and Circuits
Semester
: 03
Department
:
Electrical and Electronics Engineering (EEE)
Year
:
Second Year (II Year)
Regulation : 2013
Subject
Code :
EC6202
Subject
Name :
Electronic Devices and Circuits
Content
:
EC6202 Electronic Devices and Circuits - Important Part B 16 Mark Questions
By : www.exammain.com
Unit 1
1.Explain
the working of PN junction diode along with its VI characteristics.
2.
Explain the operation of bridge rectifier with neat diagram.Derive the ripple
factor, TUF and efficiency.
3.
How zener diode can be used as shunt regulator.?
4.
Explain the working of laser diode.
5.
Explain the working of zener diode.
Unit 2
1.
Explain the construction and working of SCR
2.
With neat sketch, explain the input and output characteristics of CE
configuration.
3.Explain
the different types of biasing in BJT.
4.
Compare CC,CE and CB configuration.
5.
With neat sketch, describe the construction and working of n-channel JFET.
UNIT 3
1.Derive
the h-parameters for CC amplifier.
2.A
common source FET amplifier uses load resistance Rd=100kΩ
and an unbypassed resistor Rs in the source circuit.
The
FET has drain resistance Rd=200KΩ nad μ=20.compute the voltage gain and
output impedance Ro, for Rs=10KΩ.
3.Draw
the small signal equivalent circuit of FET amplifier in CS connection and
derive the equations for voltage gain,
input
impedance and output impedance.
4.Using
the hybrid equivalent model, analyze and deduce the expression for the
parameters using the circuit sketch.
what
is the significance of this approach
5.
For a CB amplifier driven by a voltage source of internal resistance Rs = 1200 Ω, the load impedance is a resistor
RL=
1000Ω. The h-parameters are hib= 22Ω, hrb =3 x 10-4 ,hfb= -0.98 and hob= 0.5 µA/V. Compute the current gain
Ai,
input impedance Ri, voltage gain Av, overall current gain Ais, overall voltage
gain Avs, and output impedance Zo.
Unit 4
1.Derive
the equation for differential mode gain and common mode gain of a differential
amplifier
2.Draw
the single tuned amplifier and explain the frequency response
3.Explain
in detail classification of power amplifier.
4.With
the neat diagram explain the class A, class B and class AB amplifier and derive
its efficiency.
5.explain
in detail about cascaded amplifiers
Unit 5
1.Draw
the block diagram of voltage series feedback amplifier and derive the equation
for input impedance output
impedance
and the voltage gain. Calculate the voltage gain ,input and output resistance
of a voltage series feedback
amplifier
having AV=300,Ri=1.5k Ω ,Ro=50k Ω and β=1/15
2.Discuss
the various topologies of feedback amplifier
3.Draw
the circuit diagram and explain the principle of operation of the following
oscillators: i)RC phase shift
oscillator(8)
ii) Any one LC oscillator
4.Explain
the effects of negative feedback in amplifiers
5.Draw
the circuit of Hartley oscillator and explain its working. Derive the
expressions for frequency oscillation and
condition
for starting of oscillation.
Questions
Are Expected for University Exams This May or may Not Be Asked for Exams
EC6202 Electronic Devices and Circuits - Important Questions - DOWNLOAD PDF >>
Important Part A , Part B 16 Mark Questions - DOWNLOAD PDF >>
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