Amplitude-Frequency Characteristic


Also found in: Acronyms.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Amplitude-Frequency Characteristic

 

the dependence of the amplitude of a sinusoidal oscillation on its frequency at the output of an apparatus. The characteristic is measured by applying an oscillation of constant amplitude and variable frequency to the input of the apparatus in the linear mode. The amplitude-frequency characteristic is often called simply the frequency characteristic. For ease of visualization it is plotted in the form of a curve; the amplitudes or relative amplitudes are laid off along the vertical axis (often in decibels), and the frequencies (sometimes on a logarithmic scale) along the horizontal axis. In electrical engineering, radio technology, and other technical fields, the amplitude-frequency characteristic yields various parameters (frequency pass band, selectivity, and others) by which the operation of apparatus and devices can be assessed.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
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Caption: FIGURE 16: Amplitude-frequency characteristic and phase-frequency characteristic ([alpha] = 1.2, [beta] = 0.16, 1, 6.25).
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The experiments of the amplitude-frequency characteristics are carried out under open-loop conditions by an Agilent 35670A dynamic signal analyzer.

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