Cirrus Logic CS4224 - Manual (Page 29)

CS4223 CS4224
DS290F1 29
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)
Am
p
lit
ude
(d
B
)
Analog Digital
Figure 16. Hybrid Analog/Digital Attenuation