Aamir Cs Report.docx

Communication Systems Lab Project Group Members 1- AAMIR MANSOOR 2- MIRZA M. FAUZAN 3- ATTIQUE-UR-REHMAN

BEE- 5C Fall 2018 Submitted to Mam Zahida Parveen.

Department of Electrical Engineering

Abstract: This paper presents a new audio amplifier that imposes voltage on the speakers. The amplifier topology is based on two current sources that modulate the desired voltage waveform on a capacitor, employing two high frequency switches. The capacitor is connected in parallel to the speakers. The operation principle, control circuits, simulation and experimental results are presented. An audio power amplifier (or power amp) is an electronic amplifier that reproduces lowpower electronic audio signals such as the signal from radio receiver or electric guitar pickup at a level that is strong enough for driving (or powering) loudspeakers or headphones. This includes both amplifiers used in home audio systems and musical instrument amplifiers like guitar amplifiers. It is the final electronic stage in a typical audio playback chain before the signal is sent to the loudspeakers and speaker enclosures.

Acknowledgement: we have shown our full efforts in this assignment. However, it would not have been possible without the kind support and help of all group members. We are thankful for the support of our class professor Dr. Sohaib Soomro for helping us in this project report as the outcome of our learning in this very form. we’re grateful to ALLAH ALMIGHT and he support of our parents. We’re thankful to our lab engineer Mam Zahida Parveen also for her kind support in the completion of this project. Regards: Aamir Mansoor M.Fauzan Attique-ur-rehman

TABLE OF CONTENTS

1-

Abstract.

2

2-Acknowledgement.

3

3-Table of Content.

3

Audio Amplifier. 1.1- Introduction.

5

1.2- Block diagram.

5

1.3- Application of Audio Amplifier.

5

1.4-

Circuit Diagram.

6

1.5-

Components.

6

1.6-

Working Principle of Audio Amplifier.

7

1.7-

Result.

7

1.8-

Innovation.

8

1.9-

Conclusion.

8

Audio Amplifier: Introduction: An audio power amplifier (or power amp) is an electronic amplifier that reproduces lowpower electronic audio signals such as the signal from radio receiver or electric guitar pickup at a level that is strong enough for driving (or powering) loudspeakers or headphones. This includes both amplifiers used in home audio systems and musical instrument amplifiers like guitar amplifiers. It is the final electronic stage in a typical audio playback chain before the signal is sent to the loudspeakers and speaker enclosures.

Block diagram:

Application of Audio Amplifier: Important applications include public address systems, theatrical and concert sound reinforcement systems, and domestic systems such as a stereo or home-theatre system. Instrument amplifiers including guitar amplifiers and electric keyboard amplifiers also use audio power amplifiers. In some cases, the power amplifier for an instrument amplifier is integrated into a single amplifier "head" which contains a preamplifier, tone controls, and electronic effects. These components may be mounted in a wooden speaker cabinet to create a "combo amplifier".

Circuit Diagram of Audio Amplifier:

Components: 1- Resistors 2.2, 22k, ohm 2- Led light. 3- Transistors D718 , B688 4- Speaker. 5- Capacitors. 6- Resistors. 1k, 10k etc 7- Battery. 12 volt 8- Aux cable. 9- Switch. 10- Tda 2030

TOOLS AND HARDWARE: - soldering iron - hot glue gun - solder sucker - solder - wire cutters - pliers - screw driver set - multimeter - dremel or a drill

- sandpaper - glue

Working Principle of Audio Amplifier: Some types of audio equipment use two separate amplifiers—a pre-amplifier ("pre-amp") and a main amplifier. The pre-amplifier takes the original signal and boosts it to the minimum input level that the main amplifier can handle. The main amplifier then boosts the signal enough to power loudspeakers

Results:

Innovation: We did innovation by designing a pre- amplifier circuit using a transistor 2N2222. A preamplifier circuit enhances our signal power and by using TDA2030 ic our signal is amplified. • While this project was successful in designing and implementing a fully functional Class B audio amplifier there are many additional areas that can be explored to complement the completed more efficient Class D audio amplifier. The focus of this project was to develop an amplifier to drive an 8Ω load. However, a working amplifier is a component that can be used in many different products, from guitar amplifiers to home theater receivers.

Conclusion: This final written review introduces the application of an audio amplifier. We used an amplifier ic TDA2030 and a transistor and give input using an aux cable. By setting a particular frequency using a variable resistor. Our circuit is working properly and amplifies our audio signal.