Chebyshev Type1 Bs

  • May 2020
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clear all; alp=20; als=60; wp=[.2*pi,.4*pi]; ws=[.1*pi,.5*pi]; [n,wn]=cheb1ord(wp/pi,ws/pi,alp,als); [b,a]=cheby1(n,als,wn,'stop'); w=0:0.01:pi; [h,ph]=freqz(b,a,w); m=20*log10(abs(h)); a=angle(h); subplot(2,1,1); plot(ph/pi,m); grid; ylabel('gain in db'); xlabel('normlised freq'); subplot(2,1,2); plot(ph/pi,a); grid; ylabel('phase in radian');xlabel('normlised freq');

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