%
% Example 12.9 and Figure 12.22
%
num=[1 1]
den1=[1 0]
den2=[1 2]
den3=[1 10 25]
den12=conv(den1,den2)
den=conv(den12,den3)
bode(num,den,{0.1,100})
grid
print -deps fig12_22.eps