Peculiarities of Digital Infinite Impulse Response Filters Design

Abstract

Digital filtering is very important in systems, which require minimal physical space and low power consumption. Example is system of physiological parameters monitoring in a real time. Infinite impulse response filters are widely used where linear phase are not critical, because of calculation efficiency. There are presented digital filter transfer functions realizations and given comparison of sensitivity of coefficients quantization for any actual realization. Algorithm for calculating normal poles and zeroes of analog filter and coefficients of transfer function subjected. Order for digital filter design from analog normalized transfer filter function shown. Software, according this method was made in C++ programming language, intended for digital filter design. The results are presented of this software designed filters testing. Ill. 3, bibl. 4 (in English; Summaries in Lithuanian, English, Russian).