little bits of amplifier

Amplifier simply called amp, its used to increase the amplitude of signal,these electronic amplifier is mainly applicable for audio systems. The relationship of the input to the output of an amplifier usually expressed as a function of the input frequency is called the transfer function of the amplifier, and the magnitude of the transfer function is termed the gain.Efficiency states the how much of input is usefully applied to the amplifier's output.Two different types of classes are used to represent the efficiency of the Amplifier. That’s Class A and Class B. Normally Class A type is practically used by peoplebecause of its less amount of distortion. But class B type amplifier having very high efficiency along with high distortion. Apart from these two types of amp ClassAB also available.this is used to create 35-55% efficient with a theoretical maximum of 78.5%. Commercially available Class D switching amplifiers have reported efficiencies as high as 97%. Amplifiers of Class C-F are usually known to be very high efficiency amplifiers.