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Design And Construction Of 20watts Wireless Public Address System
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It has become inevitable that there would be communication and due to the inherent limitation of the human voice, the public address system came to being. A public address or “P.A SYSTEM†is an electronic amplification system with a mixer ,amplifier and loudspeakers, used to reinforce a given sound , e.g a person making a speech, pre-recorded music ,or message and distributing the sound throughout a venue . The voice signal is passed through a microphone , which converts the sound energy to electrical energy, the energy electrical signal being transmitted is been received and amplified by the amplifier circuit. The amplifier’s output is fed into the loudspeaker which converts the electrical energy back to the original form but amplified sound energy. This project is made up of the power supply unit, the pre-amplifier and power amplifier units, and the tone control unit. This system is capable of delivering 20W of electrical power into a 8 ohm load(loudspeaker).
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CHAPTER ONE - [ Total Page(s): 3 ]In this project, the audio amplifier used is capable of delivering
20watts continuously. The term “power amplifier†is a relative term with
respect to the amount of power delivered to the load and/or sourced by
the supply circuit.In general a power amplifier is designated as the
last amplifier in a transmission chain (the output stage) and is the
amplifier stage that typically requires most attention to power
efficiency. Power amplifiers have also become lighter, smaller, ... Continue reading---
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CHAPTER ONE - [ Total Page(s): 3 ]In this project, the audio amplifier used is capable of delivering
20watts continuously. The term “power amplifier†is a relative term with
respect to the amount of power delivered to the load and/or sourced by
the supply circuit.In general a power amplifier is designated as the
last amplifier in a transmission chain (the output stage) and is the
amplifier stage that typically requires most attention to power
efficiency. Power amplifiers have also become lighter, smaller, ... Continue reading---
ABSRACT -- [Total Page(s) 1]
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ABSRACT -- [Total Page(s) 1]
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