Bode Plot of Low Pass Filter and High Pass Filter

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khoirul wakiah nasution 2017-6-13

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https://ww2.mathworks.cn/matlabcentral/answers/344485-bode-plot-of-low-pass-filter-and-high-pass-filter

回答： mahmoud 2023-12-10

How to plot the bode plot of a low pass filter and a second order high pass filter with the gain and frequency based on the value entered by the GUI user.

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Answer 1

Victor Wetzel 2017-6-13

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https://ww2.mathworks.cn/matlabcentral/answers/344485-bode-plot-of-low-pass-filter-and-high-pass-filter#answer_270532

编辑：Victor Wetzel 2017-6-13

在 MATLAB Online 中打开

You have two solutions here:

1: Implementing the explicit formula of your filter, and do a simple plot. It should look quite like:

w = [20: 10: 20000];
filter = 1/(1 + w^2);
plot(w, 20*log10(filter) );

2: design a filter and use the 'bode' function. The help file of this function might be more helpfull. If you just type 'bode' in the console, you'll see an example