Davide Baderna Alessandro Cabrini Guido Torelli Marco Pasotti Efficiency comparison between doubler and Dickson charge pumps. 1891-1894 2005 conf/iscas/2005 ISCAS (2) http://dx.doi.org/10.1109/ISCAS.2005.1464981 db/conf/iscas/iscas2005-2.html#BadernaCTP05