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)： 27/64頁
文件大?。?/td> 1052K
代理商： PBL38773/1SO
Ringing FlexiSLIC
PBL 38773/1
Transmission
Data Sheet
33
DS1, 2003-06-18
5.4
Four-Wire to Two-Wire Gain
E
L = 0:
[7]
For applications where
[8]
the expression for G
4-2 simplifies to:
[9]
5.5
Four-Wire to Four-Wire Gain
E
L = 0:
[10]
5.6
Hybrid Function
The PBL 38773/1 SLIC may be used together with either software programmable or non-
programmable codec/filters. When used together with programmable codec/filters the
system controller permits adjustment of hybrid balance to accommodate different line
impedances without change of hardware. In addition, the transmit and receive gains may
be adjusted under software control. Please, refer to applicable programmable
codec/filter data sheets for design information.
The hybrid function can also be implemented utilizing the uncommitted amplifier in
conventional non software programmable codec/filters. Please, refer to Figure 10. Via
impedance
Z
B a current proportional to VRX is injected into the summing node of the
combination codec/filter amplifier. As can be seen from the expression for the four-wire
to four-wire gain, G
4-4, a voltage proportional to VRX is returned to VTX. This voltage is
G
42
–
V
TR
V
RX
----------
Z
T
Z
RX
---------
1
G
24S
–
----------------
×
Z
L
Z
T
α
RSN
G
×
24S
–
------------------------------------
Z
L
2
R
F
++
----------------------------------------------------------------
×
–
==
Z
T
α
RSN
G
×
24S
–
------------------------------------2
R
F
Z
L
=
+
G
42
–
Z
T
Z
RX
---------
–
1
2G
24S
–
×
--------------------------
×
=
G
44
–
V
TX
V
RX
----------
Z
T
Z
RX
---------
Z
L
2
R
F
+
Z
T
α
RSN
G
×
24S
–
------------------------------------
Z
L
2
R
F
++
------------------------------------------------------------------
×
–
==
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