演えん算ざん増ぞう幅ふく器きMeaningsNoun1. operational amplifierKanji used演performance算calculate増increase幅width器instrumentComposed of演えん算ざんoperation; calculationNoun増ぞう幅ふくamplification; magnification; making largerNoun器きdevice; instrument; vessel; container; ability; capacity; calibre; caliberNoun