Anna University, Chennai Nov/Dec 2012 Examinations
Important Questions
EE2203
- Electronic Devices and Circuits
III Sem EEE
Unit I-V
1.
explain
the working of a PN junction forward bias and reverse bias in detail
2.
Draw
its VI characteristics and explain the operation of zener diode and define
zener breakdown.
3.
Define
regulator. Explain the operation of any one type of regulator
4.
With
a neat sketch, explain the operation of CLC filter
5.
Explain
how the hybrid parameters hfe , hoe, hie, hre can be determined from the CE
characteristics of a transistor
6.
Draw
the input and output characteristics of N-P-N transistor in common base
configuration and explain it. How the different hybrid parameters are found out
from the above characteristics
7.
Draw
and explain input and output characteristics of common emitter configuration of
a transistor
8.
Write
short note on voltage gain and current gain expressions for CB configuration
using transistor hybrid model
9.
Explain
in detail about the construction and operation of JFET.
10.Explain the working
principle and characteristics of Depletion N-MOSFET under depletion mode and
enhancement mode in detail
11.
Write
short note on FET as Voltage Variable resistor
12.explain the
operation of Colpitts oscillator with neat diagram
13.
Draw
the circuit diagram of a phase shift oscillator using BJT. Derive the
expression for its frequency of oscillation. Determine the minimum hfe
for the transistor
14.Briefly discuss the
effect of negative feedback on band width and stability of an amplifier
15.
explain
the operation of Schmitt trigger using two transistor for a sinusoidal input with
circuit diagram and waveform
16.Explain in detail
about collector coupled astable multivibrator and its operation with relevant
operation.
17.
Explain
the operation of UJT saw tooth oscillator
18.Explain how RC
circuits are used as integrator and differentiator. Sketch the output waveform
for the square input
