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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Schmitt trigger ： ウィキペディア英語版 Schmitt trigger In electronics a Schmitt trigger is a comparator circuit with hysteresis implemented by applying positive feedback to the noninverting input of a comparator or differential amplifier. It is an active circuit which converts an analog input signal to a digital output signal. The circuit is named a "trigger" because the output retains its value until the input changes sufficiently to trigger a change. In the non-inverting configuration, when the input is higher than a chosen threshold, the output is high. When the input is below a different (lower) chosen threshold the output is low, and when the input is between the two levels the output retains its value. This dual threshold action is called ''hysteresis'' and implies that the Schmitt trigger possesses memory and can act as a bistable multivibrator (latch or flip-flop). There is a close relation between the two kinds of circuits: a Schmitt trigger can be converted into a latch and a latch can be converted into a Schmitt trigger. Schmitt trigger devices are typically used in signal conditioning applications to remove noise from signals used in digital circuits, particularly mechanical contact bounce. They are also used in closed loop negative feedback configurations to implement relaxation oscillators, used in function generators and switching power supplies. == Invention == The Schmitt trigger was invented by US scientist Otto H. Schmitt in 1934 while he was still a graduate student,〔Otto H. Schmitt, , Journal of Scientific Instruments 15 (January 1938): 24–26.〕 later described in his doctoral dissertation (1937) as a "thermionic trigger."〔August 2004 issue of the Pavek Museum of Broadcasting Newsletter - http://160.94.102.47/Otto_Images/PavekOHSbio.pdf〕 It was a direct result of Schmitt's study of the neural impulse propagation in squid nerves.〔 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「Schmitt trigger」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.