Cirrus-logic CS4221 User Manual Page 27

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CS4220 CS4221
DS284PP3 27
Figure 14. 2- and 3-Pole Butterworth Filters
Gain
dB
-10 dB
0 dB
Frequency
T2 = 15 µs
T1 = 50 µs
F1 F2
Figure 15. De-emphasis Curve
Signal
Noise
0
0 -113.5
Attenuation (dB)
Amplitude (dB)
Analog Digital
Figure 16. Hybrid Analog/Digital Attenuation
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