Audio Power Amplifier by Name Roll No. Registration No: Anupam Saha 11700314022 141170110204 of 2014-2015 Siddhartha Sarkar 11700314097 141170110279 of 2014-2015 Md. Jaseem 11700314053 141170110235 of 2014-2015 Saklain Mallik 11700314077 141170110259 of 2014-2015 A comprehensive project report has been submitted in partial fulfillment of The requirements for the degree of Bachelor of Technology in ELECTRONICS & COMMUNICATION ENGINEERING Under the supervision of Mr. ARPAN DEYASI Assistant Professor Department of Electronics & Communication Engineering RCC INSTITUTE OF INFORMATION TECHNOLOGY Affiliated to Maulana Abul Kalam Azad University of Technology, WestBengal CANAL SOUTH ROAD, BELIAGHATA, KOLKATA – 700015 May, 2018 CERTIFICATE OF APPROVAL This is to certify that the project titled Audio Power Amplifier carried out by Name Roll No. Registration No: Anupam Saha 11700314022 141170110204 of 2014-2015 Siddhartha Sarkar 11700314097 141170110279 of 2014-2015 Md. Jaseem 11700314053 141170110235 of 2014-2015 Saklain Mallik 11700314077 141170110259 of 2014-2015 for the partial fulfillment of the requirements for B.Tech degree in Electronics and Communication Engineering from Maulana Abul Kalam Azad University of Technology, West Bengalis absolutely based on his own work under the supervision of Mr. Arpan Deyasi. The contents of this thesis, in full or in parts, have not been submitted to any other Institute or University for the award of any degree or diploma. .......................................................... Dr. Abhishek Basu Head of the Department (ECE) RCC Institute of Information Technology DECLARATION We Do hereby declare that this submission is our own work conformed to the norms and guidelines given in the Ethical Code of Conduct of the Institute and that, to the best of our knowledge and belief, it contains no material previously written by another neither person nor material (data, theoretical analysis, figures, and text) which has been accepted for the award of any other degree or diploma of the university or other institute of higher learning, except where due acknowledgement has been made in the text. .......................................................... .......................................................... Anupam Saha Siddhartha Sarkar Registration No: 141170110204 OF 2014-2015 Registration No: 141170110279 of 2014-2015 Roll No: 11700314022 Roll No: 11700314097 .......................................................... .......................................................... Md Jaseem Saklain Mallik Registration No: 141170110235 of 2014-2015 Registration No: 141170110259 of 2014-2015 Roll No: 11700314053 Roll No: 11700314077 Date: 11.05.2018 Place: RCCIIT, Kolkata CERTIFICATE of ACCEPTANCE This is to certify that the project titled Audio Power Amplifier carried out by Name Roll No. Registration No: Anupam Saha 11700314022 141170110204 of 2014-2015 Siddhartha Sarkar 11700314097 141170110279 of 2014-2015 Md. Jaseem 11700314053 141170110235 of 2014-2015 Saklain Mallik 11700314077 141170110259 of 2014-2015 Is hereby recommended to be accepted for the partial fulfillment of the requirements for B.Tech degree in Electronics and Communication Engineering from Maulana Abul Kalam Azad University of Technology, West Bengal Name of the Examiner Signature with Date 1. ……………………………………………………………… .…………………………………..……………………………. .……………………………………………………………… 4. …………………………………….………………………… Acknowledgement Patience and preservation is the part & parcel to make fulfill any desired motto successful. Not only this two indispensable characters but also kind operation and zestful help are always required with which one can be able to reach his ultimate goal after passing through a series of several incidents. Likewise we do have the pleaser to expose that we have completed our job training project on "AUDIO POWER AMPLIFIER". So, at the very outset we deeply feel like expressing my indebtedness and gratitude to all concerned, unless whos help, valued suggestions, guidance and moral boosting, the presence of the work of ours would not have been possible. In the beginning, we do express our heartfelt gratitude in deep humility to MR.ARPAN DEYASI (PROJECT Supervisor) who has provided us with the facilities in achieving the objective to prepare the project work. We also express our sincere thanks from bottom of the heart to MR.SUJOY MONDAL (PROJECT Coordinator) whos valuable and priceless suggestions helped us at various stages of the project. Date: - ------------------------------------------ [Signature of Project Supervisor] ABSTRACT The aim of this project was to design and develop a audio power amplifier. The amplifier is mainly for the CD, DVD players which are most common audio player today. In this Project, we study the audio amplifier circuits. Moreover study the flow of the whole system from a music player to the loudspeakers. Each functions of the components in the amplifier. Then the whole single ended audio power amplifier is built. After finish the whole have some different test and measurement to define the performance of the amplifier. Finally, the most important thing was use the amplifier to listen music and feels the different of transistor amplifier. CONTENTS CERTIFICATE ............................................................................................................................................. DECLARATION.......................................................................................................................................... CERTIFICATEOF ACCEPTANCE…………………………………………………………………………………… CONTENTS ................................................................................................................................................. LIST OF SYMBOLS .................................................................................................................................... LIST OF ABBREVIATIONS ..................................................................................................................... LIST OF FIGURES ...................................................................................................................................... LIST OF TABLES ........................................................................................................................................ Introduction……………………………………………………………………………………………. 1.1 problem defination ..................................................................................................................... 1.2 problem statement ...................................................................................................................... 1.3 analysis .......................................................................................................................................... 1.4 outcome ......................................................................................................................................... REFERENCE LIST OF SYMBOLS Ω - Ohm μ Micro Av- Voltage Amplification Ai- Current Amplification Ap- Power Amplification LIST OF ABBREVIATIONS PCB Printed Circuit Board RMS Root Mean Square K-Ohm Kilo-Ohm dB Decibel Amp Ampere V Voltage R Resistance LIST OF FIGURES Fig 1.1 Power amplifier diagram 2 Fig 1.2 Class AB amplifier 5 Fig 1.3 Vacuum Tuber amplifier & Transistor Amplifier 7 Fig 1.4 Fig 1.5 100 watt RMS Class (AB) Power Amplifier 8 Fig 1.6 Step Down Transformer along with Bridge Rectifier 10 Fig 1.7 12V Voltage Regulator Circuit(Block & Pin diagram) 10 Fig 1.8 LED Display Circuit 11 Fig 1.9 Pre-Amplifier 12 Fig 2.0 Power Amplifier Circuit 14 Fig 2.1 PCB Design 16 Fig 2.2 Building of Amplifier( Step 1 – Step 6) 17 &18 Fig 2.3 Basic Application of Audio amplifier(diagram) 19 Introduction 1.1 Amplifier:- An amplifier is an electronic device that increases the voltage, current, or power of a signal. Amplifiers are used in wireless communications and broadcasting, and in audio equipment of all kinds. They can be categorized as either weak-signal amplifiers or power amplifiers. An amplifier is one of the most commonly used electronic devices in the world. Its a basic building block of a vast number of circuits, and comes in various forms. Amplifiers can be defined simply as an electronic device that increases the power of a signal. In other words, it increases the amplitude of a signal, and makes it stronger than the given input. Although this sounds simple in theory, amplifiers have a lot of parameters and conditions in the real world. Amplification is never perfectly efficient; there are always losses, distortion and noise to deal with. Thus, there are a whole load of amplifiers created, that work best in different situations. Not all amplifiers provide optimal output in all situations, and theres always cost factors to consider. So heres all the types of amplifiers and all you need to know about them! 1 What is an Audio Power Amplifier? The power amplifier receives the audio signal from the mixing board or signal processor and magnifies it, giving it the power it needs to drive your speakers and entertain your audience. In this article, we'll discuss the things you need to know when choosing an amplifier for your pro audio system. Fig 1.1 1.2 What to look for in an amplifier Most amplifiers have similar features. The differences come in the amount power it produces, the number of channels it has, the types of connections it offers, how the controls are set up, and whether it has any built-in processing or effects. 1.3 How much power do I need?