
20
DS895F2
CS4354
5. COMBINED DIGITAL AND ON-CHIP ANALOG FILTER RESPONSE PLOTS
0.4
0.5
0.6
0.7
0.8
0.9
1
120
100
80
60
40
20
0
SingleSpeed Stopband Rejection
Frequency(normalized to Fs)
Amplitude(dB)
0.4
0.42
0.44
0.46
0.48
0.5
0.52
0.54
0.56
0.58
0.6
120
100
80
60
40
20
0
SingleSpeed Transition Band
Frequency(normalized to Fs)
Amplitude(dB)
Figure 10. Single-Speed Stopband Rejection
Figure 11. Single-Speed Transition Band
0.45
0.46
0.47
0.48
0.49
0.5
0.51
0.52
0.53
0.54
0.55
10
9
8
7
6
5
4
3
2
1
0
SingleSpeed Transition Band Detail
Frequency(normalized to Fs)
Amplitude(dB)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
0.06
0.04
0.02
0
0.02
0.04
0.06
SingleSpeed Passband Ripple
Frequency(normalized to Fs)
Amplitude(dB)
Figure 12. Single-Speed Transition Band (detail)
Figure 13. Single-Speed Passband Ripple
0.4
0.5
0.6
0.7
0.8
0.9
1
120
100
80
60
40
20
0
DoubleSpeed Stopband Rejection
Frequency(normalized to Fs)
Amplitude(dB)
0.4
0.42
0.44
0.46
0.48
0.5
0.52
0.54
0.56
0.58
0.6
120
100
80
60
40
20
0
DoubleSpeed Transition Band
Frequency(normalized to Fs)
Amplitude(dB)
Figure 14. Double-Speed Stopband Rejection
Figure 15. Double-Speed Transition Band