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EPC Module 5

The document outlines the syllabus for the Electronic Principles and Circuits course (BEC303) at A.G.M Rural College of Engineering and Technology, focusing on power amplifiers and thyristors. Key topics include Class A, B, and C amplifier operations, their characteristics, and various types of thyristors such as SCRs and IGBTs. The notes are prepared by Prof. Asif Iqbal Mulla and cover essential concepts related to amplifier terms, load lines, and the functioning of different types of thyristors.

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17 views25 pages

EPC Module 5

The document outlines the syllabus for the Electronic Principles and Circuits course (BEC303) at A.G.M Rural College of Engineering and Technology, focusing on power amplifiers and thyristors. Key topics include Class A, B, and C amplifier operations, their characteristics, and various types of thyristors such as SCRs and IGBTs. The notes are prepared by Prof. Asif Iqbal Mulla and cover essential concepts related to amplifier terms, load lines, and the functioning of different types of thyristors.

Uploaded by

rahul0bkb
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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S.D.M.

Jainmatt Trust®
A.G.M RURAL COLLEGE OF ENGINEERING AND TECHNOLOGY, VARUR,
HUBLI
DEPARTMENTOFELECTRONICS AND COMMUNICATION ENGINEERING

NOTES
Subject with code:Electronic Principles and Circuits (BEC303)

Module 5

Prepared By

Prof. ASIF IQBAL MULLA


Department of Electronics and Communication

Syllabus :

Power Amplifiers: Amplifier terms, Two load lines, Class A Operation, Class B operation, Class
B push pull emitter follower, Class C Operation.

Thyristors: The four layer Diode, SCR, SCR Phase control, Bidirectional Thyristors, IGBTs,
Other Thyristors.
Amplifier Terms

Classes of operation

Types of Coupling
Range of frequency

Signal Levels
Two load lines
DC load line

AC load line
Class A Operation

Power gain of Class A amplifier

Output power of class A amplifier


Transistor power dissipation

Drain current

Efficiency of Class A amplifier


Emitter follower power amplifier
Class B Operation
Class B Push Pull amplifier
Advantages of Class B push pull amplifier

Disadvantages of Class B push pull amplifier

Class B push pull emitter follower


DC load line

AC load line

Class C Operation
Load line of class C amplifier
Thyristors

The four layer diode

Positive feedback
Closing latch

The Shockley diode

Breakover characteristics
The silicon controlled rectifier(SCR)
The SCR phase control
Bidirectional Thyristors

Diac

Traic
IGBTs(Insulated gate bipolar transistor)
Basic Construction

IGBT Control
Other Thyristors
Photo SCR

Gate Controlled Switch


Silicon Controlled Switch

Unijunction transistor
Programmable unijunction transistor (PUT)

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