Article
Article
Amplifier
Article By:
Schaumann, Rolf Department of Electrical Engineering, Portland State University, Portland, Oregon.
Last reviewed:October 2019
DOI:https://doi.org/10.1036/1097-8542.030500
A device capable of increasing the magnitude of a physical quantity. This article discusses electronic amplifiers whose operation depends on transistors. Some amplifiers are magnetic, while others may take the form of rotating electrical machinery. Forms of nonelectrical amplifiers are hydraulic actuators and levers which are amplifiers of mechanical forces. See also: Direct-current motor; Hydraulic actuator; Lever
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