Algorithm for calculation of recursive digital filter coefficients of the second order according to the specific requirements for the access with the application accurate design forms

Abstract

The article obtained exact calculation formulas and, on their basis, developed an algorithm for calculating second-order recursive digital filter coefficients using known resonant frequency and filter bandwidth limits for a given non-uniformity of amplitude-frequency characteristic in the passband of this filter.

Keywords

• recursive digital filters
• characteristics of digital filters
• bandwidth
• non-uniformity of characteristics in the passband