Datasheet

VoiceUplink(TX)Filter8kHz
–10
–8
–6
–4
–2
0
2
3000 3100 3200 3300 3400 3500 3600
Frequency(Hz)
1storderHPF
Specification
3rdorderHPF
Gain(dB)
032-045
TPS65950
SWCS032E–OCTOBER 2008–REVISED JANUARY 2011 www.ti.com
Figure 6-32. Voice Uplink Frequency Response With F
S
= 8 kHz (Frequency Range 3000 to 3600 Hz)
Table 6-24 lists the voice filter frequency responses relative to reference gain at 1 kHz with F
S
= 8 kHz.
Table 6-24. Digital Voice Filter TX Electrical Characteristics With F
S
= 8 kHz
Parameter Test Conditions Min Typ Max Unit
Frequency response relative to reference gain at 1 kHz 100 Hz –20 dB
200 Hz –8 –0.5
300 to 3300 Hz –0.5 0 0.5
3400 Hz –1.5 0 0.1
4000 Hz –17
4600 Hz –40
>6000 Hz –45
Pole when HPF is disabled (first-order HPF) 24 Hz
Group delay 0.5 ms
96 Audio/Voice Module Copyright © 2008–2011, Texas Instruments Incorporated
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