Z.M. Yuldashev - Dr. Sc. (Eng.), Professor, Head of the Department of Biotechnical Systems, Saint-Petersburg Electrotechnical University «LETI» E-mail: yuld@mail.ru M.N. Solovev - Post-graduate Student, Department of Biotechnical Systems, Saint-Petersburg Electrotechnical University «LETI»; Engineer, Firm «Diamant» Ltd (St.-Petersburg) E-mail: zenimike@gmail.com

N.V. Kovalenko1, K.V. Sovin2, O.A. Ryabushkin3

1,2 Moscow Institute of Physics and Technology (Dolgoprudny, Russia)

1,3 Fryazino branch of Kotelnikov IRE of RAS (Fryazino, Russia)