Power Amplifiers

Abstract

The term amplifier is very generic. In general, the purpose of an amplifier is to take an input signal and make it stronger (or in more technically correct terms, increase its amplitude). Amplifiers find application in all kinds of electronic devices designed to perform any number of functions. There are many different types of amplifiers, each with a specific purpose. During the last ten years, interest in higher efficiency power amplification has increased, particularly in the audio industry. The major driving force behind the power amplification has been the need to provide fresh opportunities with the advantages that higher efficiency potentially offers: higher power with increased power density, Savings in energy and battery life, potential cost savings, and even potential performance improvement . The interest in this field is global and includes all major industrial segments, such as consumer electronics, automotive audio, pro audio, and mobile devices. The Class of a power amplifier refers to the design of the circuitry within the power amplifier. there are many classes like class A,B,C,D,AB,E,F,G,H etc