Julio Walter received the B.S. degree in physics, the M.Sc. and PhD degree in electronic engineering from the Universidad SimÃ³n BolÃvar, Caracas, Venezuela, in 1984, 1994 and 2006, respectively. Since 2000, he has been Professor of Electronics, Department of Electronics and Circuits, Universidad SimÃ³n BolÃvar. His research interests include renewable energy sources, induction heating, radio frequency power systems, and audio systems.