翻訳と辞書 Words near each other ・ Phase converter ・ Phase correlation ・ Phase curve ・ Phase curve (astronomy) ・ Phase detector ・ Phase detector characteristic ・ Phase diagram ・ Phase dispersion minimization ・ Phase distinction ・ Phase distortion ・ Phase distortion synthesis ・ Phase Eight ・ Phase Equilibria Diagrams ・ Phase factor ・ Phase field models ・ Phase frequency detector ・ Phase I environmental site assessment ・ Phase II ・ Phase II (album) ・ Phase II Pan Groove ・ Phase III (album) ・ Phase inversion ・ Phase inversion (chemistry) ・ Phase IV ・ Phase IV (album) ・ Phase jitter modulation ・ Phase lag (rotorcraft) ・ Phase line ・ Phase line (cartography) ・ Phase line (mathematics) 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 frequency detector ： ウィキペディア英語版 Phase frequency detector A phase frequency detector (PFD), in electronics, is a device which compares the phase of two input signals. It has two inputs which correspond to two different input signals, usually one from a voltage-controlled oscillator (VCO) and another from some external source. It has two outputs which instruct subsequent circuitry on how to adjust to lock onto the phase. To form a Phase-locked loop (PLL) the PFD phase error output is fed to a loop filter which integrates the signal to smooth it. This smoothed signal is fed to a voltage-controlled oscillator which generates an output signal with a frequency that is proportional to the input voltage. The VCO output is also fed back to the PFD to form the PLL circuit. The PFD is an improvement over the phase comparators of early PLLs in that it also provides a frequency error output as well as a phase error signal. ==References== * * * 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 frequency detector」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.