Analog and Digital Filters
619
FIGURE 6.45
Input and output plots of the LPF of Example 6.4.
Ϫ5
5
0
frequencyϭ1000 Hertz
Amplitude
0
0.2
0.4
0.6
0.8
time in sec
1
1.2
1.4
1.6
1.8
2
1
Output LPF versus t
0
Output Amplitude
Ϫ1
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
10
Input signal versus t
Input Amplitude
0
0.2
0.4
0
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Ϫ10
ϫ10 −3
ϫ10 −3
ϫ10 −3
FIGURE 6.46
Input and output plots of the HPF of Example 6.4.
Ϫ10
10
0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
ϫ10 Ϫ4
ϫ10 Ϫ4
ϫ10
Ϫ3
time in sec
Amplitude
frequencyϭ35 K Hrz
10
Input signal versus t
Ϫ10
0
Input Amplitude
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Ϫ1
Output Amplitude
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1
0
0
output HPF versus t
CRC_47760_CH006.indd 619
CRC_47760_CH006.indd 619
7/23/2008 2:26:48 PM
7/23/2008 2:26:48 PM