amplifier

6 ENTRIES FOUND:

am·pli·fi·er

noun \ˈam-plə-ˌfī(-ə)r\

: a device that increases the strength of electric signals so that sounds played through an electronic system are louder

Full Definition of AMPLIFIER

:  one that amplifies; specifically :  an electronic device (as in a stereo system) for amplifying voltage, current, or power

Examples of AMPLIFIER

  1. He plugged his electric guitar into an amplifier.

First Known Use of AMPLIFIER

1546

am·pli·fi·er

noun \ˈam-plə-ˌfī(ə)r\   (Medical Dictionary)

Medical Definition of AMPLIFIER

: one that amplifies; specifically : an electronic device (as in a computer or sound-reproducing system) for amplifying voltage, current, or power

amplifier

noun    (Concise Encyclopedia)

Device that responds to a small input signal (voltage, current, or power) and delivers a larger output signal with the same waveform features. Amplifiers are used in radio and television receivers, high-fidelity audio equipment, and computers. Amplification can be provided by electromechanical devices (e.g., transformers and generators) and vacuum tubes, but most electronic systems now employ solid-state microcircuits. One amplifier is usually insufficient, so its output is fed into a second, whose output is fed to a third, and so on, until the output level is satisfactory.

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