MATLAB program for the design and implementation of Chebyshev low pass filter

Program code

%Chebyshev low pass filter

clc;

clear all;

close all;

fp=input('Please enter the pass band frequency: ');

fs=input('Please enter the stop band frequency: ');

rp=input('Please enter the pass band attenuation: ');

rs=input('Please enter the stop band attenuation: ');

sf=input('Please enter the sampling frequency: ');

wp=2*fp/sf;

ws=2*fs/sf;

[n,wn]=cheb1ord(wp,ws,rp,rs);

[b,a]=cheby1(n,rp,wn,'low');

freqz(b,a);

title('Chebyshev low pass filter');

Example of output

Please enter the pass band frequency: 2000

Please enter the stop band frequency: 1600

Please enter the pass band attenuation: .4

Please enter the stop band attenuation: 50

Please enter the sampling frequency: 8000 

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MATLAB program for the design and implementation of Chebyshev high pass filter

Program code

%Chebyshev high pass filter

clc;

clear all;

close all;

fp=input('Please enter the pass band frequency: ');

fs=input('Please enter the stop band frequency: ');

rp=input('Please enter the pass band attenuation: ');

rs=input('Please enter the stop band attenuation: ');

sf=input('Please enter the sampling frequency: ');

wp=2*fp/sf;

ws=2*fs/sf;

[n,wn]=cheb1ord(wp,ws,rp,rs);

[b,a]=cheby1(n,rp,wn,'high');

freqz(b,a);

title('Chebyshev high pass filter');

Example of output

Please enter the pass band frequency: 2000

Please enter the stop band frequency: 1600

Please enter the pass band attenuation: 0.3

Please enter the stop band attenuation: 40

Please enter the sampling frequency: 8000

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MATLAB program for the design and implementation of Chebyshev band pass filter

Program code

%Chebyshev band pass filter

clc;

clear all;

close all;

fp1=input ('Please input the first pass band frequency = ');

fs1=input ('Please input the first stop band frequency = ');

fp2=input ('Please input the second pass band frequency = ');

fs2=input ('Please input the second stop band frequency = ');

rp=input ('Please input the pass band attenuation = ');

rs=input ('Please input the stop band attenuation = ');

sf=input ('Please input the sampling frequency = ');

p1=2*fp1/sf;

s1=2*fs1/sf;

p2=2*fp2/sf;

s2=2*fs2/sf;

p=[p1,p2];

s=[s1,s2];

[n,w]=cheb1ord(p,s,rp,rs);

[f1,f2]=cheby1(n,rp,w,'bandpass');

freqz(f1,f2);

title ('Chebyshev Band Pass Filter');

Example of output

Please input the first pass band frequency = 2000

Please input the first stop band frequency = 1600

Please input the second pass band frequency = 3000

Please input the second stop band frequency = 3200

Please input the pass band attenuation = 0.5

Please input the stop band attenuation = 50

Please input the sampling frequency = 9000

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