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參數資料
型號: TPS65950ZXNT
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA209
封裝: 7 X 7 MM, 0.40 MM PITCH, PLASTIC, BGA-209
文件頁數: 163/167頁
文件大小: 2566K
代理商: TPS65950ZXNT
6.2.10 Digital Voice Filter Module
A/Doutput
Voiceinterface
SINCfilter
integrator
SINCfilter
differentiator
Low-pass
filter
High-pass
filter
Error
cancellation
032-043
6.2.10.1 Voice Uplink Filter (Sampling Frequency at 8 kHz)
VoiceUplink(TX)Filter8kHz
–10
–8
–6
–4
–2
0
2
0
100
200
300
400
500
600
Frequency(Hz)
1storderHPF
Specification
3rdorderHPF
Gain(dB)
032-044
TPS65950
Integrated Power Management/Audio Codec
www.ti.com
SWCS032 – OCTOBER 2008
Table 6-23. Digital Audio Filter TX Electrical Characteristics (continued)
Parameter
Test Conditions
Min(1)
Typ(2)
Max(3)
Unit
Stopband
0.6
FS
Stopband attenuation
In region 0.6*FS to 1*FS
(4)
60
dB
Group delay
15.8/FS
s
Figure 6-30 shows the digital voice filter uplink full path characteristics for the voice interface.
Figure 6-30. Digital Audio Filter Uplink Path Characteristics
The global HPF or only the third-order HPF can be bypassed (when the third-order HPF is skipped, the
first-order HPF remains active). It is controlled by the MISC_SET_2 VTX_3RD_HPF_BYP bit, address
0x49, the for the third-order HPF, and by the VTX_HPF_BYP bit for the global HPF.
Figure 6-31 and Figure 6-32 show the voice uplink frequency response with a sampling frequency of 8
kHz.
Figure 6-31. Voice Uplink Frequency Response With FS = 8 kHz (Frequency Range 0 to 600 Hz)
Audio/Voice Module
95
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