Large-capacitance devices consisting of subthreshold CMOS operational amplifiers Tomoki IIDA Tetsuya ASAI Yoshihito AMEMIYA Department of Electrical Engineering, Hokkaido University - 337 - 第22回 回路とシステム 軽井沢ワークショップ The 22nd Workshop on Circuits and Systems in Karuizawa, April 20-21, 2009