Get the complete project »
- The Complete Research Material is averagely 52 pages long and it is in Ms Word Format, it has 1-5 Chapters.
- Major Attributes are Abstract, All Chapters, Figures, Appendix, References.
- Study Level: BTech, BSc, BEng, BA, HND, ND or NCE.
- Full Access Fee: ₦4,000
Over the past two decades, many types of audio amplifier design approaches have been tried. Many of these designs have use larger amount of negative feedback to ensure low closed-loop harmonic distortion. The main contributors to this type of distortion are the output devices. Other contributors are drivers or devices preceding the output devices and the high voltage gain stage also referred as the transconductance stage.
Before analyzing the basic concept of an audio amplifier, lets define an amplifier. An amplifier is an electronic devices that magnifies signal of a sound. A power amplifier is electronic device that accept a small input power and delivers a large output signal that contains essential wave form from features of the signal input. The aim of constructing this audio amplifier is to achieve consistent maximum power delivery into the load with low distortion. This devices is constructed in five stages; the power supply, the rectifier, the input, the amplification and output stages.
1.0 BACKGROUND OF STUDY
An audio amplifier is an electronic device used in every sound production system, which serve as a channel drive for the speaker to obtain a good production of sound. Different varieties of sound system benefits from this device such systems are: receivers intercom, microphone, telephone, pick up coils, general audio monitoring etc. under this, its operation principle will also be viewed. However, this work will give an insight on what make up an audio amplifier, its circuit design and layout design. Amplifier problem arise with drift produced by change in temperature or aging of components. Therefore, special techniques must be employed to reduce the undesirable signal in the output to negligible values.
This project highlights an audio amplifier’s circuit design and its operation principle. Problems and solutions will be reviewed, its mode of maintenance and testing, general precautions and miscellaneous will be presented in th
1.1 STATEMENT OF PROBLEM
Out in the audio amplifiers market, there are thousands of audio amplifiers. Most of these amplifiers produces low power output, even if there is an audio that has a high power output, it’s still has its weakness.
Audio amplifiers are of the most important building blocks of sound reproduction in the millennium era. With an emphasis on sound quality in the design of an amplifier, most amplifiers are inefficient. For many amplifiers, poor efficiency is not really a problem. However, there are situations where are more efficient amplifier would be extremely beneficial.
One example is a battery powered amplifier, when batteries powers up electronic equipment, the amount of power saved by the amplifier will almost be proportional to the time allowed between battery charges. Most high power amplifiers in use today are relatively inefficient. The need to use large heat sinks to dispute the wasted power supply results in an extremely heavy unit.
1.2 AIM AND OBJECTIVE OF THE STUDY
This project is aimed at the construction of an audio amplifier that will give an output that preserves the waveform of the input signal and hence reduce the distortion.It objectives are:
v To express in simplest term for any electronic engineering student and even non-technicians to understand amplifying design.
v To broaden the scope of study in the production of sound system.
v To let the readers know the basic component use for the construction of an audio amplifier.
1.3 SIGNIFICANCE OF THE STUDY
The major significance of this project is to construct and design audio amplifier which will be effective in the production of good sound system for the public and private use. Also it will proffer solution to problems encountered with most commonly used amplifier such as humming, noisy outputs, interference, resonance, unfettered and undesired sound signal, heating etc. The finding and recommendations of this research work will obviously help in solving these problems militating against effective performance in an audio amplifier.
1.4 SCOPE OF THE STUDY
The construction and operation of this audio amplifier is to give a reasonable output power of 200walts. The amplifier is designed to operate into the load such as speakers of various electronics set and it is arrange in five  stage which include; power supply (transformer),rectification, input , amplification and output stage.
1.5 LIMITATION OF THE STUDY
In construction of this audio amplifier, certain developments militated against its successful completion at the initial stage. These are:
v Due to the erratic supply of power, the researcher had to wake up late at night in order to construct this project since power was only restored at night.
v Some of the component of the original design had to be change due to scarcity in market.
1.6 DEFINITION OF TERMS
This section defines some of the relevant terms or words used in the project. They are:
AUDIO: - It is a sound or the reproduction of sound.
AMPLIFIER: - An assembly containing one or more values of transistors and associated components such as inductors, capacitors and resistors to design that the signal applied to the input produce an output of a larger signal.
AUDIO AMPLIFIER: It is electronic device in a sound production system, which function as a drive to the speaker for a good sound production output.
BRIDGING: - A crossover socket between track or component pad during soldering.
COMPONENT: These are electronic devices used collectively to achieve a desire aim in the design of the circuit.
TROUBLESHOOTING:-These are symptoms, trace in an equipment due to fault, dirt, burns and excessive vibration.
RESISTOR:-It is a device that gives opposition to flow of current. It has two terminals or leads but no polarity.
CAPACITOR: - It is an electronic component that has the ability to store and discharge electrical charges.
AMPLIFICATION: It is the ratio of output signal to input signal to input signal. In principle, the output signal must be greater than the input signal for amplification to be useful.
DISTORTION:-It occurs when output waveform is not the same as the input waveform. All amplifiers in practice introduce some measure of distortion.
TRANSDUCER: It is an electromechanical device which converts energy from one form to another and the out is an electrical signals.
RECTIFICATION: - It is a process for changing Alternating currents (AC) to Direct Current (DC) by an electronic device rectifier.
TRANSFORMER:- This is a device that transfers energy between two or more circuits through electromagnetic induction.
TRANSCONDUCTANCE: - This is the property of certain electronic components. It is the ratio of the current variation at the output to the voltage at the input.
You either get what you want or your money back. T&C Apply
You can find more project topics easily, just search
SIMILAR ELECTRICAL ENGINEERING FINAL YEAR PROJECT RESEARCH TOPICS
1. INSTALLATION OF SOLAR/ INVENTER AND DEEP CYCLE RECHARGEABLE BATTERIES FOR POWERING THIRTY DUSTY COMPUTER AND A PROJECTOR» CHAPTER ONE 1.0 INTRODUCTION 1.1 BACKGROUND OF THE STUDY In the nineteenth century through the middle of the twentieths century DC to AC power convert...Continue Reading »
2. EVALUATION OF NIGERIAN GAS PRODUCTION & ELECTRICITY GENERATION FROM NATURAL GAS USING REGRESSION ANAYLSIS (1999-2014)» CHAPTER ONE INTRODUCTION 1.1. Background of the study Nigeria is a nation that has been blessed with mineral resources ranging from solid minerals to ...Continue Reading »
» ABSTRACT This report is on stability study in electrical power system. The ability of an electric power system to reestablish the initial state (or on...Continue Reading »
» ABSTRACT The research is strictly concerned with finding out the impact of community radio Station on grassroots development. The first chapter explai...Continue Reading »
» CHAPTER ONE INTRODUCTION · BACKGROUND INFORMATION As the world becomes concerned with conserving electric power and the fuels that generate electrici...Continue Reading »
» ABSTRACTUninterruptible power supplies (UPS) are used to provide power when regular utility power is unavailable. Although they are commonly used for ...Continue Reading »
» ABSTRACT The advantage of cellular communication like GSM technology is a potential solution for such remote controlling activities. GSM SMS technolog...Continue Reading »
8. AN INSIGHT ON THE DESIGN AND CONSTRUCTION OF A POWER LINE VANDALISM MONITORING SYSTEM USING ELECTRONIC SYSTEM» CHAPTER ONE INTRODUCTION 1.1 BACKGROUND OF THE STUDY This project gives the insight on the design and construction of a transmission power line vandal...Continue Reading »
» ABSTRACTThe Automatic pump control with water level monitor and digital display is an electrical system constructed for convenient and adequate contro...Continue Reading »
» CHAPTER ONE 1.0 INTRODUCTION 1.1 BACKGROUND The world’s economies have over the last few decades, undergone dramatic transformation as nations striv...Continue Reading »