參數(shù)資料
型號(hào): PBL38773/1SO
廠商: INFINEON TECHNOLOGIES AG
元件分類: 模擬傳輸電路
英文描述: TELECOM-SLIC, PDSO28
封裝: PLASTIC, SOIC-28
文件頁數(shù): 25/64頁
文件大小: 1052K
代理商: PBL38773/1SO
Ringing FlexiSLIC
PBL 38773/1
Transmission
Data Sheet
31
DS1, 2003-06-18
5Transmission
5.1
General
A simplified AC model of the transmission circuit is shown in Figure 9.
Figure 9
Simplified AC Model of PBL 38773/1
Circuit analysis from the Ac model in Figure 9 yields following equations:
[1]
[2]
[3]
where:
V
TX
Is the ground referenced AC voltage at the
VTX terminal.
V
TR
Is the AC metallic voltage between TIP and RING.
E
L
Is the line open circuit AC metallic voltage.
E
L
R
F
R
F
Z
TR
TIP
VTX
HP
RINGX
RING
Z
L
V
TR
+
_
+
_
+
_
G
2-4S
I
L
I
LRSN
R
HP
RSN
Z
T
Z
RX
V
RX
+
_
V
TX
+
_
ac_sch_73
I
L
TIPX
PBL 387 73
V
TR
V
TX
G
24S
----------------
I
L
+2
R
F
×
=
I
L
α
RSN
------------
V
TX
Z
T
---------
V
RX
Z
RX
----------
+
=
VTR
EL IL
ZL
×
=
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