A multilevel converter including, in particular, a capacitor (C1, C2, . . . , Cn) for each of its cells. The capacitors have nominal charge voltages proportional to their respective ranks in the converter. It also includes control means (BT, DA1, . . . , DAn, pe2, . . . , pen) organized to evaluate...http://www.google.de/patents/US5668711?utm_source=gb-gplus-sharePatent US5668711 - Electronic circuit for converting electrical energy, and a power supply installation making use thereof
