Design of a CMOS low-voltage low-power circuit for an integrated pulsed ultrasonic distance measurement system. - Felix Timischl; Takahiro Inoue; Akio Tsuneda (ISCAS, 2006)

A New Low-Power 13.56-MHz CMOS Ring Oscillator with Low Sensitivity of fOSC to VDD. - Felix Timischl; Takahiro Inoue; Akio Tsuneda; Daisuke Masunaga (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)