1. Department of Technologies in Electronics, Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Park Komenskeho 2, Kosice 040 01, Slovakia
2. Minebea Slovakia s.r.o., K letisku 1637, Kosice 040 17, Slovakia
3. Department of Microelectronics, Faculty of Electrical Engineering and Communication, Brno University of Technology , Technicka 3058/10, Brno 616 00, Czech Republic