Matlab: IIR Comb Notch or Peak Filter

IIR Comb Notch Filter

fs = 600;
fo = 100;
q = 35;
bw = (fo/(fs/2))/q;
[b,a] = iircomb(fs/fo,bw,'notch'); % Note type flag 'notch'
fvtool(b,a);
zplane(b,a);

Magnitude Response

Phase Response

Pole-Zero Diagram

IIR Comb Peak Filter

Replace the 'notch' string by 'peak':

[b,a] = iircomb(fs/fo,bw,'peak'); % Note type flag 'peak'

Magnitude Response

Phase Response

Pole-Zero Diagram

Reference

iircomb (MathWorks)