parametric amplifier

American  

noun

Electronics.

1. a device, as an electron tube or transistor, that amplifies a high-frequency input signal by sinusoidally varying the reactance of the circuit.

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parametric amplifier British  

noun

1. a type of high-frequency amplifier in which energy from a pumping oscillator is transferred to the input signal through a circuit with a varying parameter, usually a varying reactance

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Etymology

Origin of parametric amplifier

First recorded in 1955–60

Example Sentences

Rather than relying on one long crystal or stacking many short ones, they run the light repeatedly through a single short crystal inside an optical parametric amplifier.

From Science Daily

Interdisciplinary in nature and uninhibited in choice, the projects have ranged from analysis and measurements of stresses in hydrofoil struts to operations research in man-machine relationships, from the design of an analog-to-digital converter to the development of statistical predictors of academic success; from feasibility studies of nuclear power plants for isolated loran stations to the synthesis of a steady-state parametric amplifier.

From Time Magazine Archive