European Researcher, 2013, Vol.(40),  2-1 244 UDC 621.3.01 Synthesis of Analog and Digital Filters in LabVIEW 1 Botagoz R. Kasimova 2 Darkhan E. Baxultanov 3 Zhanna K. Satbayeva 1 Gumilyov Eurasian National University, Kazakhstan Munaitpasov Street 5, Astana city, 010008 PhD (Technical), Associate professor E-mail: kasimova_br@enu.kz 2 Gumilyov Eurasian National University, Kazakhstan Munaitpasov Street 5, Astana city, 010008 laboratory assistant E-mail: baxultanov@mail.ru 3 Gumilyov Eurasian National University, Kazakhstan Munaitpasov Street 5, Astana city, 010008 laboratory assistant E-mail: satbayeva_zhanna@mail.ru Abstract. The paper introduces the method of analog and digital filters designing. The direct approach to the designing of the approximating polynomial for Bessel low-pass with maximum flat group delay was used. The scheme of Bessel low-pass was implemented for the specified transfer function. The automated system for time, frequency and dynamic filter characteristics measurement was designed in graphic programming environment of LabVIEW 10. Keywords: electric filter; analog filter; digital filter; Bessel filter; LabVIEW; virtual stand. Введение. П     1915 .     Д. К  К. В            . С        ,      . Ф       ,         . П         ,          ,    .               .      . Д          ,       [6, c. 12]. В     –  ,        –    – ,  ∫ ∞ − = 0 ) ( ) ( ) ( τ τ τ d x t h t y (1) Рис. 1. Ф –        –   , ,     ,  h(t) -   . П Л  (1)  Система: аналоговый фильтр с импульсной характеристикой h(t) или цифровой фильтр с импульсной характеристикой h(n) Входной сигнал x(t) Выходной сигнал y(t)