PLL

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Phase-locked loop
A phase-locked loop or phase lock loop (PLL) is an electronic control system that generates a signal that has a fixed relation to the phase of a "reference" signal. A phase-locked loop circuit responds to both the frequency and the phase of the input signals, automatically raising or lowering the frequency of a controlled oscillator until it is matched to the reference in both frequency and phase. A phase-locked loop is an example of a control system using negative feedback.
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NCI Dictionary of Cancer Terms Download this dictionary
PLL
Prolymphocytic leukemia. A type of chronic lymphocytic leukemia (CLL) in which too many immature white blood cells (prolymphocytes) are found in the blood and bone marrow. PLL usually progresses more rapidly than classic CLL.

A Service of the National Cancer Institute.

Telecommunication Standard Terms DictionaryDownload this dictionary
PLL
Abbreviation for phase-locked loop.
 
phase locked loop (PLL)
An electronic circuit that controls an oscillator so that it maintains a constant phase angle relative to a reference signal. (188 ) Note: Phase-locked loops are widely used in space communications for coherent carrier tracking and threshold extension, bit synchronization, and symbol synchronization.

FOLDOC DictionaryDownload this dictionary
PLL
phase-locked loop


(c) Copyright 1993 by Denis Howe
Dizionario inglese-italiano 1.0.012Download this dictionary
PLL
PHASE LOCKED LOOP. PRELINKED LIBRARY [FILE NAME EXTENSION] [CLIPPER]. PLL

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