AmplifiersAn amplifier is an electronic device that increases the strength of a signal, such as an audio or electrical signal. This increase in strength is known as amplification, and it allows the signal to be sent over longer distances, or to drive a load, such as a speaker or a motor. Amplifiers are used in a wide range of applications, including sound reinforcement, audio and video reproduction, and electronic instrumentation. There are many different types of amplifiers, including voltage amplifiers, current amplifiers, and power amplifiers, which are designed to amplify different types of signals and meet different performance requirements.