Signal distortion levels (how much is the original signal altered).Linearity/fidelity (how accurately the output signal resembles the input).Amplifier gain (how much a signal is amplified).This classification differentiates amplifiers based on: Based on Circuit Configuration and Method of Operation: Class A, B, AB, and C.ĭifferent types of audio amplifier classes have varying circuit configurations and methods of operation. If the input signal is in voltage, then the amplifier’s gain is a voltage gain producing higher voltage.Ī current input signal means the amplifier produces a raised output current.Īmplifiers can also produce amplified output power as a product of the voltage and current from the input source. There are different signals that an amplifier can modulate. Based on the Kind of Input Signal: Voltage, Current, and Power There are also various ways you can classify them. Types of AmplifiersĪmplifiers can be found in almost all electronic devices, so there are quite a number of types of amplifiers. To put it simply, in the case of a sound amplifier, for example, the amplifier takes sound at its input end and produces a louder sound at its output end while aiming to reduce distortions as much as possible.Īn amplifier can either be a distinct device/ equipment, or an electric circuit placed inside another device. While being powered by an electric power supply, an amplifier picks the small electrical signal applied at its input terminal, boosts it, and produces a proportionally larger signal at its output terminal. Definition and Functions of an AmplifierĪn amplifier (also informally known as “amp”) is an electronic device or component that increases the power, voltage, or current of a signal. As an affiliate, I may collect a share of sales or other compensation from the links on this page.
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