參數(shù)資料
型號： LUCL9217AAR-D
英文描述： GT 3C 3#16S PIN PLUG
中文描述： 低成本線接口，具有反向電池和PPM
文件頁數(shù)： 25/30頁
文件大?。?/td> 414K
代理商： LUCL9217AAR-D
Agere Systems Inc.
25
Data Sheet
November 2001
with Reverse Battery and PPM
L9217A/G Low-Cost Line Interface
Applications
(continued)
ac Design
(continued)
Example 1: Real Termination
(First-Generation Codec)
(continued)
The following design equations refer to the circuit in Figure 16. Use these to synthesize real termination imped-
ance.
Termination Impedance:
Z
T
=
Receive Gain:
g
rcv
=
g
rcv
=
Transmit Gain:
g
tx
=
g
tx
=
x
Hybrid Balance:
h
bal
= 20log
To optimize the hybrid balance, the sum of the currents at the VFX input of the codec op amp should be set to 0.
The following expressions assume the test network is the same as the termination impedance:
R
HB
=
h
bal
= 20log
I
T R
–
--------------
Z
T
2R
P
R
GP
1
--------
R
RCV
-----------
+
+
----------------------------------
+
=
V
fr
-------------
R
GP
1
R
T3
---------------
---------------
+
+
1
Z
T/R
------------
+
-------------------------------------------------------------------------------------
V
T R
--------------
X
R
T6
----------
Z
T
----------
V
T R
--------------
×
g
tx
g
rcv
------------------------
R
HB
-----------
g
tx
–
g
rcv
×
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LUCL9217AAR-DT 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and PPM
LUCL9217GAR-D 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and PPM
LUCL9217GAR-DT 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and PPM
LUCL9218AAR-D 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface
LUCL9218AAR-DT 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface
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