清空筛选条件
清空筛选条件

design lowpass butterworth filter

51 次查看（过去 30 天）
Steven
Steven 2022-11-17
I am just a beginner, I want to design an IIR low-pass filter butterworth. when I use function Butterord and butter, it always has frequency response from 0db.
Here is my code and result
fpass = 2500; fstop = 4000; As = 95; Rp=3; fs=44100; %Data
wp=(fpass*2)/fs; ws=(fstop*2)/fs;
[n,Wn] = buttord(wp,ws,Rp,As);
[b,a,k] = butter(n,Wn);
fprintf('\n Bac cua bo loc = %2.0f \n',n)
sos = zp2sos(b,a,k);
freqz(sos,1024,fs)
Ripple of pass-band is 3db and I want to design from 40db instead of from 0db like this. How can i do it ? please help me

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Butterworth 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by