ex9_27 - w = 0:.05:10; [mag,phase] = bode(b,a,w); clf...

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% Example 9.27 % % Analog Butterworth filter design for a bandpass filter % % w0 = 4; % center of band wb = 2; % bandwidth [z,p,k] = buttap(3); % 3 pole Butterworth filter [b,a] = zp2tf(z,p,k); % convert the zeros and poles to polynomials [b,a]=lp2bp(b,a,w0,wb); % converts the lowpass filter to a bandpass % centered at w0 with bandwidth wb % plot the frequency response
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Unformatted text preview: w = 0:.05:10; [mag,phase] = bode(b,a,w); clf subplot(211) plot(w,mag) ylabel('|H|') title('Example 9.27') xlabel('Frequency (rad/sec)') subplot(212) plot(w,phase) ylabel('Angle(H),degrees') xlabel('Frequency (rad/sec)') ytick = [-500 -270 0 270 500]; set(gca,'ytick',ytick) subplot(111) disp('b = ');disp(b'); disp('a = ');disp(a');...
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