“UNIVERSITAT POLITÈCNICA DE CATALUNYA” DEPARTMENT OF ELECTRICAL ENGINEERING DOCTORAL THESIS NOVEL PIEZOELECTRIC TRANSDUCERS FOR HIGH VOLTAGE MEASUREMENTS Author: Industrial Engineer ALFREDO VÁZQUEZ CARAZO Supervisor: Doctor Industrial Engineer RICARD BOSCH TOUS A thesis submitted to the E.T.S.E.I. Barcelona of the “Universitat Politècnica de Catalunya” (U.P.C) for the degree of DOCTOR OF ENGINEERING Barcelona, January 2000