602
Practical MATLAB
® Applications for Engineers
FIGURE 6.26
Plots of H(f) using freqs of Example 6.1.
1
0.8
0.6
0.4
0.2
0
Ϫ5
Ϫ4
Ϫ3
Ϫ2
ϫ10 4
ϫ10
4
Ϫ1
0
magnitude of H (f ) versus frequency
frequency in Hrz
magnitude
1
2
3
4
5
100
50
0
Ϫ50
Ϫ100
Ϫ5
0
phase of H (f ) versus frequency
frequency in Hrz
phase (in degrees)
5
FIGURE 6.27
Plots of ͉H(f)͉ dB and ∠H(f ) using a semilog scale of Example 6.1.
0
10
3
10 4
10 5
Ϫ40
Ϫ30
Ϫ20
Ϫ10
magnitude (dbs) versus freqs
mag in dB
0
10
3
10
4
10
5
Ϫ80
Ϫ40
Ϫ60
Ϫ20
frequency in Hrz
phase ang. versus freqs
phase (in degrees)
CRC_47760_CH006.indd 602
CRC_47760_CH006.indd 602
7/23/2008 2:26:43 PM
7/23/2008 2:26:43 PM