.Modelica.Blocks.Continuous.Internal.Filter.base.Butterworth

Information

Return base filter coefficients of Butterworth filter (= low pass filter with w_cut = 1 rad/s)

Interface

function Butterworth
  import Modelica.Constants.pi;
  extends Modelica.Icons.Function;
  input Integer order(min = 1) "Order of filter";
  input Boolean normalized = true "= true, if amplitude at f_cut = -3db, otherwise unmodified filter";
  output Real cr[mod(order, 2)] "Coefficient of real pole";
  output Real c0[integer(order/2)] "Coefficients of s^0 term if conjugate complex pole";
  output Real c1[integer(order/2)] "Coefficients of s^1 term if conjugate complex pole";
end Butterworth;