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Electronic Circuits

Subject Code: 10CS32
Hours/Week : 04
Total Hours : 52
UNIT – 1

10CS32
ELECTRONIC CIRCUITS
(Common to CSE &CSE)

PART - A

I.A. Marks : 25
Exam Hours: 03
Exam Marks: 100
7 Hours

Transistors, UJTs, and Thyristors:
Operating Point, Common-EmitterConfiguration, Thermal Runaway, Transistor Switch,
Unijunction Transistors, SCR.
UNIT - 2

6 Hours
Field Effect Transistors:
Bipolar Junction Transistors versus Field Effect Transistors, Junction Field Effect Transistors,
Metal Oxide Field Effect Transistors, Differences between JFETs and MOSFETs, Handling
MOSFETs, Biasing MOSFETs, FET Applications, CMOS Devices, Insulated Gate Bipolar
Transistors (IGBTs)
UNIT - 3

6 Hours

Optoelectronic Devices:
Introduction, Photosensors, Photoconductors, Photodiodes, Phototransistors, Light-Emitting
Diodes, Liquid Crystal Displays, Cathode Ray Tube Displays, Emerging Display Technologies,
Optocouplers
UNIT - 4

7 Hours

Small Signal Analysis of Amplifiers:
Amplifier Bandwidth: General Frequency Considerations, Hybrid h-Parameter Model for an
Amplifier, Transistor Hybrid Model, Analysis of a Transistor Amplifier using complete hParameter Model, Analysis of a Transistor Amplifier Configurations using Simplified hParameter Model (CE configuration only), Small-Signal Analysis of FET Amplifiers, Cascading
Amplifiers, Darlington Amplifier, Low-Frequency Response of Amplifiers (BJT amplifiers
only).
PART – B
UNIT - 5

6 Hours

Large Signal Amplifiers, Feedback Amplifier:
Classification and characteristics of Large Signal Amplifiers, Feedback Amplifiers:
Classification of Amplifiers, Amplifier with Negative Feedback, Advantages of Negative
Feedback, Feedback Topologies, Voltage-Series (Series-Shunt) Feedback, Voltage-Shunt

Page 1

Electronic Circuits

10CS32

(Shunt-Shunt) Feedback, Current-Series (Series- Series) Feedback, Current-Shunt (Shunt-Series)
Feedback.
UNIT - 6

7 Hours

Sinusoidal Oscillators, Wave-Shaping Circuits:
Classification of Oscillators, Conditions for Oscillations: Barkhausen Criterion, Types of
Oscillators, Crystal Oscillator, Voltage-Controlled Oscillators, Frequency Stability. WaveShaping Circuits: Basic RC Low-Pass Circuit, RC Low-Pass Circuit as Integrator, Basic RC
High-Pass Circuit, RC High-Pass Circuit as Differentiator, Multivibrators, Integrated Circuit (IC)
Multivibrators.
UNIT - 7

7 Hours

Linear Power Supplies, Switched mode Power Supplies:
Linear Power Supplies: Constituents of a Linear Power Supply, Designing Mains Transformer;
Linear IC Voltage Regulators, Regulated Power Supply Parameters. Switched Mode Power
Supplies: Switched Mode Power Supplies, Switching Regulators, Connecting Power Converters
in Series, Connecting Power Converters in Parallel.
UNIT - 8

6 Hours

Operational Amplifiers: Ideal Opamp versus Practical Opamp, Performance Parameters, Some
Applications: Peak Detector Circuit, Absolute Value Circuit, Comparator, Active Filters, Phase
Shifters, Instrumentation Amplifier, Non-Linear Amplifier, Relaxation Oscillator, Current-ToVoltage Converter, Voltage-To-Current Converter, Sine Wave Oscillators.

Text Book:
1.

Anil K Maini, Varsha Agarwal: Electronic Devices and Circuits,
Wiley, 2009.
(4.1, 4.2, 4.7, 4.8, 5.1 to 5.3, 5.5, 5.6, 5.8, 5.9, 5.13, 5.14, 6.1, 6.3, 7.1 to 7.5,
7.10 to 7.14, Listed topics only from 8, 10.1, 11, 12.1, 12.2, 12.3, 12.5, 13.1
to 13.6, 13.9, 13.10, 14.1, 14.2, 14.6, 14.7, 15.1, 15.5 to 15.7. 16.3, 16.4,
17.12 to 17.22)

Reference Books:
1.
2.

Jacob Millman, Christos Halkias, Chetan D Parikh: Millman’s
Integrated Electronics – Analog and Digital Circuits and Systems,
2nd Edition, Tata McGraw Hill, 2010.
R. D. Sudhaker Samuel: Electronic Circuits, Sanguine-Pearson

Page 2

Electronic Circuits

10CS32

Table of Contents
Unit – 1: Transistor, UJT‟s, and Thyristors............................................................................ 3
1.1 Operating Point ........................................................................................................... 3
1.2 The Common Emitter (CE) Configuration ................................................................... 7
1.3 The Transistor as a Switch ......................................................................................... 20
1.4 Silicon-Controlled Rectifiers, or SCRs ...................................................................... 27
1.5 The Gate Turn-Off Thyristors (GTO) ........................................................................ 28
1.6 Recommended Questions .......................................................................................... 37
Unit – 2: Bipolar Junction Transistors ................................................................................. 38
2.1 Bipolar junction transistor (BJT)................................................................................ 38
2.2 The Field Effect Transistor ........................................................................................ 43
2.3 The Junction Field Effect Transistor .......................................................................... 44
2.4 Comparison of connections between a JFET and a BJT ............................................. 44
2.5 JFET Amplifier ......................................................................................................... 49
2.6 CMOS ....................................................................................................................... 50
2.7 Recommended Questions .......................................................................................... 52
Unit – 3: Photodiodes .......................................................................................................... 53
3.1 Photodiodes ............................................................................................................... 53
3.2 PN Photodiode .......................................................................................................... 53
3.3 PIN Photodiode ......................................................................................................... 54
3.4 Schottky Photodiode.................................................................................................. 54
3.5 Phototransistors ......................................................................................................... 56
3.6 Light-Emitting Diodes (LED) .................................................................................... 58
3.7 Cathode Ray Tube Displays....................................................................................... 63
3.8 Emerging Display Technologies ................................................................................ 64
3.9 Optocouplers ............................................................................................................. 65
3.10 Recommended Questions......................................................................................... 67
UNIT – 4: Small Signal Analysis of Amplifiers................................................................... 68
4.1 Basic FET Amplifiers ................................................................................................ 68
4.2 THE MOSFET AMPLIFIER ..................................................................................... 68
4.3 Small-Signal Equivalent Circuit................................................................................. 74
4.4 Problem-Solving Technique: MOSFET AC Analysis ................................................ 76
4.5 Basic Transistor Amplifier Configurations................................................................. 78
4.6 The Source-Follower Amplifer .................................................................................. 87
4.7 Input and Output impedance ...................................................................................... 90
4.8 The Common-Gate Configuration.............................................................................. 91

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Electronic Circuits

10CS32

4.9 The Three Basic Amplifier Configurations: Summary and Comparison ..................... 95
4.10 Recommended Questions......................................................................................... 99
Unit – 5: Large Signal Amplifiers ..................................................................................... 100
5.1 Classification of Large Signal Amplifiers ................................................................ 100
5.2 Large signal Amplifier Characteristics ..................................................................... 102
5.3 Feedback Amplifiers ............................................................................................... 103
5.4 Stability of Gain Factor ........................................................................................... 105
5.5 Feedback Topologies ............................................................................................... 107
5.6 Recommended Questions ........................................................................................ 108
UNIT – 6: Sinusoidal Oscillators....................................................................................... 109
6.1 Principles of oscillators............................................................................................ 109
6.2 Phase shift Oscillator ............................................................................................... 114
6.3 Band Pass Oscillators .............................................................................................. 120
6.4 Wien Bridge Oscillator ............................................................................................ 123
6.5 Colpitts and Hartley Oscillators ............................................................................... 126
6.6 Piezoelectric Crystal Oscillators .............................................................................. 133
6.7 Recommended Questions ........................................................................................ 146
UNIT – 7: Linear Power Supplies, Switched mode Power Supplies ................................... 147
7.1 Regulated power supply .......................................................................................... 147
7.2 POWER SUPPLY FILTER ..................................................................................... 147
7.3 Fixed Positive Linear Voltage Regulators ................................................................ 149
7.4 The Regulated Dual Voltage DC Power Supply ....................................................... 153
7.5 Recommended Questions ........................................................................................ 155
UNIT – 8: Operational Amplifier ...................................................................................... 156
8.1 Operational Amplifier (Op-Amp) ............................................................................ 156
8.2 Ideal Op-Amp.......................................................................................................... 157
8.3 Applications of Opamp ............................................................................................ 159
8.4 Instrumentation Amplifier ....................................................................................... 167
8.5 Relaxation Oscillator ............................................................................................... 169
8.6 Current-to-Voltage Converter .................................................................................. 169
8.7 Voltage-to-Current Converter .................................................................................. 170
8.8 Exercise Problems ................................................................................................... 171
8.9 Recommended Questions ........................................................................................ 173

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