Power Amplifier
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.
DRAWING
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
The Title Page should be the first section of your project “Power Amplifier”, providing essential details like the project title, your name, your supervisor’s name, the institution, and the submission date. After that, the Abstract offers a brief summary of your project, touching on its purpose, methods, results, and conclusions in 150-300 words. The Acknowledgments section is where you can thank those who supported your research, such as your supervisor, peers, or organizations that provided resources.
Next, the Table of Contents organizes the Power Amplifier by listing its chapters and sections, along with page numbers for easy reference. The List of Figures and List of Tables help guide readers to specific visual elements like graphs, charts, or tables included in the document. There should also be an Abbreviations and Glossary section to explain any specialized terms or acronyms, making the content clearer to readers unfamiliar with the technical language.
The main body of the Power Amplifier should start with the Introduction, which provides background information, outlines the research problem, states your objectives, and gives a brief overview of your research methods. Following that, the Literature Review offers an in-depth look at previous research relevant to your project, identifying gaps your study aims to address. The Methodology section then explains the research design, tools, and data collection methods you used to conduct the project and analyze the data.
In the Results and Discussion section, you present your findings and discuss them in relation to the Power Amplifier research questions or objectives, often using tables or charts to help explain the data. The Conclusion summarizes the key results, discusses their implications, and suggests possible directions for future research. You may also include recommendations based on your findings, offering practical advice for improvements or applications. Finally, the Power Amplifier project should include a References or Bibliography section to list all the sources you cited, as well as Appendices for any additional material. A Statement of Originality is often included to confirm the authenticity of your work