614 Practical MATLAB® Applications for Engineers
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Solution to part (f)
Coefficients of the numerator of the trans. function
[butter/LPF/wc=1]
0 0 1
Coefficients of the denominator of the trans. function
[butter/LPF/wc=1]
1.0000 1.4142 1.0000
Transfer function:
1
-----------------
s^2 + 1.414 s + 1
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Solution to part (g)
Coefficients of the numerator of the transf. function
[butter/wc=2rad/sec]
4
Coefficients of the denominator of the transf. function
[butter/wc=2rad/sec]
1.0000 2.8284 4.0000
Transfer function:
4
-----------------
s^2 + 2.828 s + 4
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FIGURE 6.38
Plots of H(w) of Example 6.3 with R = L = C = 1.
1.4 0
20
40
60
80
100
120
140
160
180
1.2
0.8
Magnitude
Angle in degrees
0.6
0.4
0.2
0
01 2
frequency in rad/sec
34 012
frequency in rad/sec
Phase of H(w) versus w
[for RLC1]
Magnitude of H(w) versus w
[or RLC1]
34
1