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Amplifier

What is an amplifier?

An amplifier is an electronic circuit or device that increases the amplitude (strength) of an input signal, producing a larger output signal while preserving the original signal's characteristics. It takes a weak electrical signal and boosts it to a higher power level, voltage, or current using energy from an external power source. Amplifiers are fundamental components in audio systems, radio transmitters, sensors, and many other electronic applications where signal strengthening is required.

Related Terms

Amplification

Amplification is the process of increasing the magnitude of an electrical signal, typically voltage, current, or power. This is accomplished using active electronic components like transistors or operational amplifiers that take a weak input signal and produce a stronger output signal while preserving the original signal's characteristics. Amplification is essential in audio systems, radio communications, sensor interfaces, and many other electronic applications where signals need to be boosted for processing or transmission.