A.  Novo, Gerosa, A., Neviani, A., Zanoni, E., and Mozzi, A., ?Programmable voltage multipliers for pacemaker output pulse generation in CMOS 0.8 um technology?, in Solid-State Circuits Conference, 1999. ESSCIRC '99. Proceedings of the 25th European, 1999, pp. 386 - 389.