翻訳と辞書 Words near each other ・ Phantom Blot ・ Phantom Blue ・ Phantom Blue (album) ・ Phantom Blues ・ Phantom Brave ・ Phantom Breaker ・ Phantom Bride EP ・ Phantom Buffalo ・ Phantom Cam ・ Phantom Canyon ・ Phantom Canyon (Fort Collins Area) ・ Phantom Canyon (Pikes Peak Area) ・ Phantom cat ・ Phantom cave snail ・ Phantom center ・ Phantom circuit ・ Phantom City Studios ・ Phantom Club ・ Phantom contour ・ Phantom Corsair ・ Phantom Crash ・ Phantom Creek Formation ・ Phantom debt ・ Phantom Dog Beneath the Moon ・ Phantom Dream ・ Phantom Dust ・ Phantom Eagle ・ Phantom energy ・ Phantom Entertainment ・ Phantom EP 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 Phantom circuit ： ウィキペディア英語版 Phantom circuit In telecommunication and electrical engineering, a phantom circuit is an electrical circuit derived from suitably arranged wires with one or more conductive paths being a circuit in itself and at the same time acting as one conductor of another circuit. ==Phantom group== A phantom group is composed of three circuits that are derived from two single-channel circuits to form a ''phantom circuit''. Here the phantom circuit is a third circuit derived from two suitably arranged pairs of wires, called side circuits, with each pair of wires being a circuit in itself and at the same time acting as one conductor of the third circuit. The "side circuits" within phantom circuits can be coupled to their respective voltage drops by center-tapped transformers, usually called "repeating coils". The center taps are on the line side of the side circuits. Current from the phantom circuit is split evenly by the center taps. This cancels crosstalk from the phantom circuit to the side circuits. Phantom working increased the number of circuits on long distance routes in the early 20th century without putting up more wires. Phantoming declined with the adoption of carrier systems. It is theoretically possible to create a phantom circuit from two other phantom circuits and so on up in a pyramid with a maximum 2n-1 circuits being derived from n original circuits. However, more than one level of phantoming is usually impractical. Isolation between the phantom circuit and the side circuits relies on accurate balance of the line and transformers. Imperfect balance results in crosstalk between the phantom and side circuits and this effect accumulates as each level of phantoms is added. Even small levels of crosstalk are unacceptable on analogue telecommunications circuits since speech crosstalk is still intelligible down to quite low levels. 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「Phantom circuit」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.