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・ Frequency sharing
・ Frequency shift
・ Frequency specific microcurrent
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・ Frequency-dependent foraging by pollinators
・ Frequency-dependent selection
・ Frequency-division multiple access
・ Frequency-division multiplexing
・ Frequency-doubling illusion
・ Frequency-exchange signaling
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Frequency-locked loop
・ Frequency-resolved optical gating
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Frequency-locked loop : ウィキペディア英語版
Frequency-locked loop

A frequency-lock, or frequency-locked loop (FLL), is an electronic control system that generates a signal that is locked to the frequency of an input or "reference" signal. This circuit compares the frequency of a controlled oscillator to the reference, automatically raising or lowering the frequency of the oscillator until its frequency (but not necessarily its phase) is matched to that of the reference.
A frequency-locked loop is an example of a control system using negative feedback. Frequency-lock loops are used in radio, telecommunications, computers and other electronic applications to generate stable frequencies, or to recover a signal from a noisy communication channel.
== See also ==

*Phase-locked loop

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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