Power transmission of a Butterworth filter
[h]=buttmag(order,omegac,sample)
integer : filter order
real : cut-off angular frequency (in rad/s)
real vector of angular frequencies (in rad/s), where the transmission must be evaluated.
Butterworth filter values at sample points
squared magnitude response of a Butterworth filter
omegac
= cutoff frequency ; sample
= sample of frequencies
//squared magnitude response of Butterworth filter h=buttmag(13,300,1:1000); mag=20*log(h)'/log(10); plot2d((1:1000)',mag,[2],"011"," ",[0,-180,1000,20]) | ![]() | ![]() |