Analog and Digital Filters
627
FIGURE 6.54
Magnitude and phase plots of the analog denormalized LPF of part (b) of Example 6.7.
1.1
Mag. of LPF with wcϭ3
1
0.9
0.8
0.7
0.4
0.3
0
w in rad/sec
5
Ϫ5
0.2
magnitude
0.6
0.5
w in rad/sec
Ϫ200
Ϫ150
Ϫ100
Ϫ50
0
50
100
150
200
Phase of LPF with wcϭ3
degrees
0
5
Ϫ5
FIGURE 6.53
Magnitude and phase plots of the analog normalized LPF of Example 6.7.
1
Mag. analog norm. LPF
0
5
w in rad/sec
Ϫ5
0.6
0.8
0.4
0.2
0
Magnitude
4
3
2
1
0
Ϫ1
Ϫ2
Ϫ3
Ϫ4
Phase analog norm. LPF
w in rad /sec
0
5
Ϫ5
angle
CRC_47760_CH006.indd 627
CRC_47760_CH006.indd 627
7/23/2008 2:26:52 PM
7/23/2008 2:26:52 PM