Minho Kwon Youngcheol Chae Gunhee Han Sub-µW Switched-Capacitor Circuits Using a Class-C Inverter. 1313-1319 2005 88-A IEICE Transactions 5 http://dx.doi.org/10.1093/ietfec/e88-a.5.1313 db/journals/ieicet/ieicet88a.html#KwonCH05