Analog and Digital Filters
615
FIGURE 6.39
Plots of H(w) of Example 6.3 with R = 1 and L = C = 1/2.
1.2
0
Ϫ50
Ϫ100
Ϫ150
1.1
0.8
0.9
Magnitude
Angle in degrees
0.6
0.7
0.4
0.5
0.3
0.2
0
1
2
frequency in rad/sec
3
4
0
1
2
frequency in rad/sec
Phase of H(w) versus w
[for LϭCϭ1/2, Rϭ1]
Magnitude of H(w) versus w
[for LϭCϭ1/2, Rϭ1]
3
4
1
FIGURE 6.40
Plots of H(w) using lp2lp of Example 6.3.
1.2
0
Ϫ50
Ϫ100
Ϫ150
1.1
0.8
0.9
Magnitude
Angle in degrees
0.6
0.7
0.4
0.5
0.3
0.2
0
1
2
frequency in rad /sec
3
4
0
1
2
frequency in rad /sec
Phase of H(w) versus w
[using |p2|p]
Magnitude of H(w) versus w
[using |p2|p]
3
4
1
CRC_47760_CH006.indd 615
CRC_47760_CH006.indd 615
7/23/2008 2:26:47 PM
7/23/2008 2:26:47 PM