PREFACE
The
aim of this project is to construct power amplifier. The system is expected to amplify. The major components in the circuit is the
integrated circuit (IC JRE with some circuit elements for the normal operation of
the circuit. So as to amplifier an
output, the general construction dealt with in the chapters.
The levels
of treatments presuppose a detailed knowledge of electronics and basic electric
circuit such as for part of most technical institute. The report should be value to students
reading electrical electronics engineering.
LIST OF SYMBOL AND
ABBREVIATIONS
A - (Ampere) Unit of current
B - (Found) Unit of
Capacitor
HZ - (Hertz) Unit of
Frequency
IC - (Integrated
circuit clup
K - Kilo 1 x 103
M - Milli 1 x 10-3
U - Micro 1 x 10-6
n - Nano 1 x 10-12
W - (ohms) Unit of
Resistance
V - (Volts) Unit of
voltage
TABLE OF CONTENTS
TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWLEDGEMENT
PREFACE
LIST OF SYMBOLS AND ABBREVIATION
TABLE OF CONTENTS
CHAPTER ONE
1.0 INTRODUCTION
1.1
GENERAL DESCRIPTION
1.2
INTERNAL AND EXTERNAL FEATURE
1.3
SEQUENCES OF OPERATION
CHAPTER TWO
2.0
DESCRIPTION OF AUDIO PRE-AMPLIFIER
2.1 CHARACTERISTIC
OF AUDIO PRE-AMPLIFIER
2.2
THE CONTROL STATE
CHAPTER THREE
3.0 DESCRIPTION
OF (IC) INTEGRATED CIRCUIT
3.1
ELECTRICAL CHARACTERISTICS
3.2
APPLICATION OF INTEGRATED CIRCUIT
CHAPTER FOUR
4.0 POWER
SUPPLY
CHAPTER FIVE
5.0 DESCRIPTION
OF GENERAL AMPLIFIES
5.1
CLASSIFICATION OF AMPLIFIERS
5.2
EFFICIENCY AND APPLICATIONS
5.3
FINDINGS AND RECOMMENDATIONS
5.4
CONCLUSION
REFERENCES
CHAPTER ONE
INTRODUCTION
Power
amplifier is an electronic device, which is used to increase sound energy. In other words, the final stage which must
driven a given load e.g mechanical indicator, a loudspeaker cathode roy tade,
magnetic deflection coil, a transmitting accrual of a communication
network. Power amplifier is also used in
regulation power supplies, chopper amplifier, motor controller etc. In general the load will by its nature,
demand a certain power from the amplifier and the out stage must be capable of
delivering the power (large current or voltage swing). The preceding stage to the power stage are
supposed to given the input to drive the power stage so that it can produce the
load requirement.
In power
amplifier a large portion of active device (transistor) characteristics is used
(i.e there is large alternating input voltage or current to make efficient use
of the device.
The
economic importance of power amplifier is know to be useful in many aspect of
both social and business activities. In
the social activity, it is found that during occasions like public gathering
and parties people us power amplifier to increase or enlarge their speech as to
be audible. While the business activity:
during business promotion, it is found that marketing agents use power
amplifier for their advertisement: for notifying the public about combating.
GENERAL DESCRIPTION
The
project is a 50 volts, 150 w Audio – power amplifier. It is capable of producing a maximum watts
(output) per channel. When in full
operation it will generate a maximum power output of cow. The system is design to deliver optimum
performance and reliability for house application.
The
external features is shown in fig (ii)
Is the
volume control
Is the tone
control?
Is the
input sector?
Is the
power switch?
Is the
power indicator?
Is the
output source?
Is the
input source?
Is the A.C
cord for the A.C power input?
THE INTERNAL FEATURES
The
system is made up of four-(4) circuit brought together to work as a unit
The four
circuits are:
The pre-
amplifier stage
The control
stage
The power
amplifier stage
The power
supply stage
SEQUENCE OF OPERATION
1.
Plug the a-c coil to a-c source of 220 to 220v
2.
Connect the input source to the output of cassette
player or radio.
3.
Connect two speakers, one to each side (ground) not
any of the outputs)
4.
Turn the volume control to minimum
5.
Turn on the cassette player or radio connected
6.
Switch on the power switch of the amplifier
7.
Then raise the volume to desired level and use the
tone control (Bass and treble) to control the tone.
Get the Complete Project Material Now!!!
