CS4351
7. DIGITAL FILTER RESPONSE PLOTS
0
0
−20
−20
Amplitude (dB)
Amplitude (dB)
−40
−40
−60
−60
−80
−80
−100
−100
−120
0.4
0.5
0.6
0.7
0.8
Frequency(normalized to Fs)
0.9
1
−120
0.4
0.42
0.44
0.46
0.48
0.5
0.52
Frequency(normalized to Fs)
0.54
0.56
0.58
0.6
Figure 13. Single-Speed (fast) Stopband Rejection
0
Figure 14. Single-Speed (fast) Transition Band
0.02
−1
0.015
−2
0.01
−3
0.005
Amplitude (dB)
Amplitude (dB)
−4
−5
0
−6
−0.005
−7
−0.01
−8
−0.015
−9
−10
0.45
0.46
0.47
0.48
0.49
0.5
0.51
Frequency(normalized to Fs)
0.52
0.53
0.54
0.55
−0.02
0
0.05
0.1
0.15
0.2
0.25
0.3
Frequency(normalized to Fs)
0.35
0.4
0.45
0.5
Figure 15. Single-Speed (fast) Transition Band (detail)
Figure 16. Single-Speed (fast) Passband Ripple
0
0
−20
−20
Amplitude (dB)
−60
Amplitude (dB)
−40
−40
−60
−80
−80
−100
−100
−120
0.4
0.5
0.6
0.7
0.8
Frequency(normalized to Fs)
0.9
1
−120
0.4
0.42
0.44
0.46
0.48
0.5
0.52
Frequency(normalized to Fs)
0.54
0.56
0.58
0.6
Figure 17. Single-Speed (slow) Stopband Rejection
Figure 18. Single-Speed (slow) Transition Band
DS566F1
31
CIRRUS [ CIRRUS LOGIC ]
