Cirrus-logic CS4221 Manuale Utente Scaricare il pdf (Pagina 27)

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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