PRACTICAL MATLAB® FOR ENGINEERS PRACTICAL MATLAB

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/wc
2]

 50

0

Angle in degrees 100

 150

0 246

frequency in rad/sec

Magnitude of H(w) versus w

[Butter/wc
2]

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