Have you always wanted to develop your own IIR filter and want to test it? You are right here. Based on IIR Filter Design, this app allows you to freely specify the coefficients a(i) and b(i) and then display them graphically as a 2D plot. The app shows the step response of IIR filters up to 2nd order. All classical transfer functions can be represented with the coefficients a(i) and b(i). The app serves as an extension to develop your own parameters and test them quickly and easily at the same time.
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