Ya.V. Turkin – Post-graduate Student, Department «Electronic Instruments and Devices», Yuri Gagarin State Technical University of Saratov

E-mail: turkin.yaroslav@gmail.com

P.V. Kuptsov – Dr.Sc.(Phys.-Math.), Professor, Department «Instrumentation Engineering», Yuri Gagarin State Technical University of Saratov

E-mail: p.kuptsov@rambler.ru