Calculates poleszerospolynomial coefficients for:
1) Butterworth (Low-Pass High-Pass)
2) Chebyshev (Low-Pass High-Pass)
3) Inverse-Chebyshev (Low-Pass)
4) Cauer-Elliptical (Low-Pass)
5) Bessel-Thomson (Low-Pass)
6) Langrange (Low-Pass)
Plots Magnitude Phase and Delay responses.

Note: Paid version additional calculates :
1) LowPass HighPass BandPass and BandStop Filters for all filter families.
2) Active circuit topology for each section.
3) Step/Impulse responses.

*** The developer takes no responsibility for errors arising from the use of this application. ****