www.gusucode.com > dsp 案例源码程序 matlab代码 > dsp/ButterworthBandpassFilterExample.m

    %% Butterworth Bandpass Filter
% Design an IIR Butterworth filter of order 10 with 3-dB frequencies of 1
% and 1.2 kHz. The sample rate is 10 kHz. Visualize the frequency response
% of the filter.

d = fdesign.bandpass('N,F3dB1,F3dB2',10,1e3,1.2e3,1e4);
Hd = design(d,'butter');

fvtool(Hd)