A.A. Shvachko – Ph.D.(Eng.), 

Department «Electronic Devices and Systems Engineering», Yuri Gagarin State Technical University of Saratov E-mail: alexandr1899@gmail.com

A.A. Zakharov – Dr.Sc.(Eng.), Professor, 

Department «Electronic Devices and Systems Engineering», Yuri Gagarin State Technical University of Saratov E-mail: zaharov@sstu.ru