略語大辞典 [E] 29 CTR current transfer ratio 電流伝達比. 半導体フォトカプラーの特性. 受光素子から出力する電流とLEDに流した電流の比.current transfer ratio; a specification of a photo-coupler device; the ratio of output photo-current to driving LED current; [E:Opt:C]. 丸善「略語大辞典」JLogosID : 11870683