616 Practical MATLAB® Applications for Engineers
FIGURE 6.41
Normalized LP Butterworth fi lter plots of H(w) of Example 6.3.
Phase of H (w) versus w
(Butter/wc 1)
0
20
40
80
Angle in degrees
60
100
120
140
160
01 23
frequency in rad/sec
Magnitude of H (w) versus w
(Butter/wc 1)
1
0.8
0.9
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0123
frequency in rad/sec
Magnitude
FIGURE 6.42
LP Butterworth fi lter plots of H(w) with wc = 2 rad/s of Example 6.3.
Phase of H(w) versus w
[Butter/wc2]
50
0
Angle in degrees 100
150
0 246
frequency in rad/sec
Magnitude of H(w) versus w
[Butter/wc2]
1
0.8
0.9
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0426
frequency in rad/sec
Magnitude