Analog Filter

This section of MATLAB source code covers Analog low pass filter and analog high pass filter matlab code.

Analog Low Pass Filter MATLAB Code

clc; 

close all;

clear all;

f=100:20:8000;

fh=900;

k=length(f);

for i=1:k;

m(i)=1/sqrt(1+(f(i)/fh)^2);

mag(i)=20*log10(m(i));

end;

figure;

semilogx(f,mag);

title('magnitude response of analog of low pass filter')

xlabel('frequency----->');

ylabel('magnitude in db');

grid on;

Output plot

Analog High Pass Filter MATLAB Code

clc;

close all;

clear all;

f=100:20:8000;

fl=400;

k=length(f);

for i=1:k;

m(i)=1/sqrt(1+(fl/f(i))^2);

mag(i)=20*log10(m(i));

end;

figure;

semilogx(f,mag);

title('magnitude response of analog of high pass filter');

xlabel('frequency----->');

ylabel('magnitude in db');

grid on;

Output plot

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