1. University of Naples Parthenope, Centro Direzionale Isola (C4),Department of Engineering (DI),Naples,Italy,80134
2. University of Naples Federico II,Department of Electrical Engineering and Information Technology (DIETI),Naples,Italy,80125
3. Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council (CNR),Naples,Italy,80131
4. Institute for Microelectronic and Microsystems,CNR-IMM,Lecce,Italy,73100