Affiliation: | 1. Department of Electrical Engineering, State University of S?o Paulo–UNESP , UNESP/FE/DEE, CP 473, CEP 17033-360, Bauru, SP, Brazil ivan@feb.unesp.br;3. Department of Electrical Engineering, State University of S?o Paulo–UNESP , UNESP/FE/DEE, CP 473, CEP 17033-360, Bauru, SP, Brazil |