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參數(shù)資料
| 型號： | TS5070FNTR |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | Codec |
| 英文描述： | PROGRAMMABLE CODEC/FILTER COMBO 2ND GENERATION |
| 中文描述： | 可編程解碼器/濾鏡組合第二代 |
| 文件頁數(shù)： | 13/32頁 |
| 文件大?。?/td> | 284K |
| 代理商： | TS5070FNTR |
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Figure 1 shows a simplified diagram of the local
echo path for a typical application with a trans-
formerinterface. The magnitude and phase of the
local echo signal,measuredat VF
X
I, area function
of the termination impedance Z
T
, the line trans-
Figure 1:
SimplifiedDiagram of HybridBalance Circuit
formerandtheimpedanceof the2Wloop,Z
L
. Ifthe
impedancereflected back into the transformerpri-
mary is expressedasZ
L
’ thenthe echopath trans-
fer functionfrom VF
R
O to VF
X
I is :
H(W) = Z
L
’ /(Z
T
+ Z
L
’)
(1)
PROGRAMMING THE FILTER
On initial power-upthe Hybrid Balance filteris dis-
abled. Beforethe hybrid balance filter can be pro-
grammedit is necessaryto designthe transformer
andterminationimpedanceinorderto meetsystem
2 Winput return loss specifications,whichare nor-
mally measured against a fixed test impedance
(600or 900
inmostcountries).Onlythencan the
echo path bemodeledand thehybridbalancefilter
programmed. Hybrid balancing is also measured
against a fixed test impedance, specified by each
national Telecom administration to provide ade-
quate control of talker and listener echo over the
majority of theirnetwork connections.This test im-
pedance is Z
L
in figure 1. The echo signal and the
degree of transhybrid loss obtained by the pro-
grammable filter must be measuredfromthe PCM
digital input D
R
0, to the PCM digital output D
X
0,
eitherbydigitaltestsignalanalysisorbyconversion
back to analogby a PCM CODEC/Filter.
Three registers must be programmed in COMBO
IIG to fully configure the Hybrid Balance Filter as
follows:
Register 1: select/de-select Hybrid Balance Filter;
invert/non-invert cancellation signal;
select/de-select Hybal2 filter section;
attenuatorsetting.
Register2: select/de-select Hybal1 filter;
set Hybal1 to Bi-Quad or 1st order;
program pole and zero frequency.
Register3 : programpolefrequencyinHybal2filter;
programzerofrequencyinHybal2filter;
settings = Please refer to software
TS5077-2.
Standard filter design techniques may be used to
modelthe echopath(seeequation(1)) and design
amatchinghybridbalancefilterconfiguration.Alter-
natively, the frequency responseof the echo path
can be measuredand the hybridbalancefilter pro-
grammed to replicate it.
An Hybrid Balance filter design guide and soft-
ware optimization program are available under li-
cense from SGS-THOMSON Microelectronics (or-
der TS5077-2).
Bit Number
Function
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
By Pass Hybal 1
Filter
X
X
X
X
X
X
X
X
Pole/zero Setting
Table 10:
Hybrid Balance Register 2 Byte 2 in-
structions
TS5070 - TS5071
13/32
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TSW5070FNTR | PROGRAMMABLE CODEC/FILTER COMBO 2ND GENERATION |
| TSP5070FNTR | PROGRAMMABLE CODEC/FILTER COMBO 2ND GENERATION |
| TS5070FN | PROGRAMMABLE CODEC/FILTER COMBO 2ND GENERATION |
| TS5071N | PROGRAMMABLE CODEC/FILTER COMBO 2ND GENERATION |
| TSP6100N | x8 ROM (Mask Programmable) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS5071 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PROGRAMMABLE CODEC/FILTER COMBO 2ND GENERATION |
| TS5071J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:A-Law/u-Law CODEC |
| TS5071N | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PROGRAMMABLE CODEC/FILTER COMBO 2ND GENERATION |
| TS507CD | 功能描述:精密放大器 Hi precision op amp RoHS:否 制造商:Maxim Integrated 每芯片的通道數(shù)量: 輸入補(bǔ)償電壓:0.25 mV at +/- 5 V 輸入電壓范圍（最大值）: 安裝風(fēng)格: 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| TS507CDT | 功能描述:精密放大器 High Precision RoHS:否 制造商:Maxim Integrated 每芯片的通道數(shù)量: 輸入補(bǔ)償電壓:0.25 mV at +/- 5 V 輸入電壓范圍（最大值）: 安裝風(fēng)格: 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
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