翻訳と辞書 Words near each other ・ Phase transitions and critical phenomena ・ Phase variation ・ Phase velocity ・ Phase VII ・ Phase vocoder ・ Phase-boundary catalysis ・ Phase-change Dual ・ Phase-change incubator ・ Phase-change material ・ Phase-change memory ・ Phase-coherent holography ・ Phase-comparison monopulse ・ Phase-contrast imaging ・ Phase-contrast X-ray imaging ・ Phase-fired controllers ・ Phase-locked loop ・ Phase-locked loop ranges ・ Phase-out of incandescent light bulbs ・ Phase-out of lightweight plastic bags ・ Phase-shift keying ・ Phase-shift mask ・ Phase-shift oscillator ・ Phase-transfer catalyst ・ Phase-type distribution ・ Phase2 International (company) ・ Phase5 ・ Phased adoption ・ Phased array ・ Phased array ultrasonics ・ Phased implementation Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Phase-locked loop ： ウィキペディア英語版 Phase-locked loop A phase-locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is related to the phase of an input signal. While there are several differing types, it is easy to initially visualize as an electronic circuit consisting of a variable frequency oscillator and a phase detector. The oscillator generates a periodic signal. The phase detector compares the phase of that signal with the phase of the input periodic signal and adjusts the oscillator to keep the phases matched. Bringing the output signal back toward the input signal for comparison is called a feedback loop since the output is "fed back" toward the input forming a loop. Keeping the input and output phase in lock step also implies keeping the input and output frequencies the same. Consequently, in addition to synchronizing signals, a phase-locked loop can track an input frequency, or it can generate a frequency that is a multiple of the input frequency. These properties are used for computer clock synchronization, demodulation, and frequency synthesis. Phase-locked loops are widely employed in radio, telecommunications, computers and other electronic applications. They can be used to demodulate a signal, recover a signal from a noisy communication channel, generate a stable frequency at multiples of an input frequency (frequency synthesis), or distribute precisely timed clock pulses in digital logic circuits such as microprocessors. Since a single integrated circuit can provide a complete phase-locked-loop building block, the technique is widely used in modern electronic devices, with output frequencies from a fraction of a hertz up to many gigahertz. ==Practical analogies== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Phase-locked loop」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.