V.A. Tsarev – Dr. Sc. (Eng.), Professor, Department «Electronic Instruments and Devices», Yuri Gagarin State Technical University of Saratov

E-mail: tsarev_va@mail.ru

V.Yu. Muchkaev – Ph. D. (Eng.), Associate Professor, Department «Electronic Instruments and Devices», Yuri Gagarin State Technical University of Saratov

E-mail: muchkaev_vadim@mail.ru

D.A. Nesterov – Post-graduate Student, Department «Electronic Instruments and Devices», Yuri Gagarin State Technical University of Saratov

E-mail: enlucioro@gmail.com