Design 2nd order band Pass filter on MATLAB using any windowing technique , then find magnitude and phase response.

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Razzaq
Razzaq on 28 Jun 2022
Edited: Sam Chak on 29 Jun 2022
Design a second order Band pass filter on MATLAB having Band width= 5k Cut off frequencies Wc1= 5k and Wc2= 10k .Use any windowing technique(FDA toolbox is not required) to design this on MATLAB Then we have to find, frequency response (magnitude, and phase)
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Sam Chak
Sam Chak on 29 Jun 2022
Oh, I see now, @Razzaq, you requested for help with complete sincerity, but at the same time your title in a professional setting sounds like instructing anyone to do your bidding. Would suggest you to edit the Title and the "Description of the Task", preferably in the Question format.
Suggestion: How to design a second-order Bandpass Filter with this formula in MATLAB?
You have to perform due diligence if you wish to "attract" meaningful answers from the Experts in Electrical & Electronics Engineering.
Coming back to your problem, not having enough knowledge is okay for the time being. Why not start searching your textbook in University Library, or a reference book in your Design Company, if you are tasked to design a Bandpass Filter?
I don't have a textbook on bandpass filter. After finding the mathematical formula, please post the formula here.

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Answers (1)

Sam Chak
Sam Chak on 29 Jun 2022
Maybe it looks like this:
Flo = 5e3; % low cutoff, (rad/s)
Fhi = 10e3; % high cutoff
R1 = sqrt(1/(Flo));
C1 = R1; % assumed, can be different
R2 = sqrt(1/(Fhi));
C2 = R2; % assumed, can be different
tau1 = R1*C1;
tau2 = R2*C2;
tau3 = R2*C1;
% transfer function of 2nd-order Bandpass Filter
s = tf('s');
Gbp = - (tau3*s)/((tau1*s + 1)*(tau2*s + 1))
Gbp = -0.0001414 s ------------------------ 2e-08 s^2 + 0.0003 s + 1 Continuous-time transfer function.
w = linspace(1e3, 5e4, 1e5);
bode(Gbp, w)

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