Analog and Digital Filters
607
FIGURE 6.32
Plots of H(f) of Example 6.2.
1
0.8
0.6
magnitude
Magnitude of H(f) versus frequency
frequency in Hrz
0.4
0.2
Ϫ5
0
5
ϫ10 4
ϫ10
4
0
100
50
phase in degrees
Phase of H(f) versus frequency
frequency in Hrz
0
Ϫ50
Ϫ100
Ϫ5
0
5
FIGURE 6.33
Plots of ͉H(f)͉ dB and ∠H(f) using a semilog scale of Example 6.2.
Ϫ50
Ϫ40
Ϫ30
Ϫ20
Ϫ10
0
magnitude in dbs
10
3
magnitude versus freqs.
10
4
0
20
40
60
80
phase in degrees
10
4
phase ang. versus freqs.
frequency in Hrz
CRC_47760_CH006.indd 607
CRC_47760_CH006.indd 607
7/23/2008 2:26:44 PM
7/23/2008 2:26:44 PM