S.Yu. Molchanov - Post-graduate Student, Department «Radio Engineering», Yuri Gagarin State Technical University (Saratov). E-mail: canishe@yandex.ru N.M. Ushakov - Dr. Sc. (Phys.-Math.), Head of Laboratory of Submicron Electronics, Saratov branch of Kotel'nikov IRE of RAS, Professor, Department «Radio Engineering», Yuri Gagarin State Technical University (Saratov). E-mail: nmu@bk.ru