B.K. Sivyakov – Dr. Sc. (Eng.), Professor, Department «Electrotechnique and Electronics», Yuri Gagarin State Technical University of Saratov

E-mail: sibokon@ rambler.ru

D.B. Sivyakov – Ph. D. (Eng.), Associate Professor, Department «Electrotechnique and Electronics», Yuri Gagarin State Technical University of Saratov

E-mail: sibokon@ rambler.ru