Wide-range and precise tissue impedance analysis circuit with ultralow current source using gate-induced drain-leakage current. - Koji Kiyoyama; Yoshiki Takezawa; Tatsuya Goto; Keita Ito; Shoma Uno; Kenji Shimokawa; Satoru Nishino; Hisashi Kino; Tetsu Tanaka (BioCAS, 2016)