Stanisław Hałgas received the D.Sc. and Ph.D. degrees in electronic and electrical engineering from the Lodz University of Technology, Lodz, Poland. He is currently Head of the Nonlinear Circuits and Systems Division, Lodz University of Technology. He has authored or co-authored one monograph, one textbook, and over 120 technical papers. His current research interests include the areas of nonlinear circuit analysis and fault diagnosis of analog circuits.