4Vasic D,Costa F,Sarraute E.A New Method to Design Piezo Electric Transformer Used in MOSFET and IGBT Gate Drive Circuits[A].Power Electronics Specialist Con- ference[C].Anaheim, USA, 2003 : 307-312.
5Heinemann L, Mast J, Scheible G, et al.Power Supply for Very High Insulation Requirements in IGBT Gate-driv- es[A].Industry Applications Conference[C].St. Louis,USA, 1998 : 1562-1566.