15. BUTTERWORTH LOWPASS FILTER

BUTTERWORTH  LOWPASS FILTER

Wp = 100/500; 

Ws = 150/500;

[n,Wn] = buttord(Wp,Ws,3,15);

n = 4;

Wn = 0.2042;

[b,a] = butter(n,Wn);

freqz(b,a,512,1000); 

title('n=4 Butterworth Lowpass Filter')