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參數(shù)資料
| 型號(hào)： | L8551 |
| 廠商： | Lineage Power |
| 英文描述： | Low-Power SLIC(低功耗用戶(hù)線接口（SLIC）) |
| 中文描述： | 低功耗用戶(hù)接口（低功耗用戶(hù)線接口電路（SLIC）） |
| 文件頁(yè)數(shù)： | 26/32頁(yè) |
| 文件大?。?/td> | 526K |
| 代理商： | L8551 |
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26
Lucent Technologies Inc.
Data Sheet
March 1997
L8551 Low-Power SLIC
Applications
(continued)
ac Design
(continued)
Example 1: Real Termination
The following design equations refer to the circuit in
Figure 33. Use these to synthesize real termination
impedance.
Termination Impedance:
Receive Gain:
Transmit Gain:
Hybrid Balance:
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:
Example 2: Complex Termination
For complex termination, the spare op amp is used
(see Figure 34).
The hybrid balance equation is the same as in Example
1.
Z
t
i
tr
–
--------
=
Z
t
2R
P
R
GP
1
--------
R
RCV
-----------
+
+
-----------------------------------
+
=
g
rcv
V
fr
--------
=
g
rcv
1
R
T1
-----------
R
GP
-----------
+
+
1
Z
T/R
---------
+
-------------------------------------------------------------------
=
g
tx
V
T/R
---------
=
g
tx
X
R
T2
-------
Z
T/R
---------
×
=
h
bal
20
V
T/R
---------
log
=
R
HB
×
g
tx
g
rcv
-------------------
=
h
bal
20
X
R
HB
--------
g
tx
g
rcv
×
–
log
=
Z
t
2R
P
R
GN
1
--------
R
RCV
-----------
+
+
-----------------------------------
T5
R
T4
Z
(
)
+
=
2R
P
k Z
T5
)
+
=
g
rcv
1
T3
--R
R
GN
R
+
+
1
t
T/R
Z
+
-----------R
=
g
tx
X
T6
R
T/R
Z
×
T5
R
T4
Z
×
1
T5X
Z
T5
R
T5X
R
GN
R
T3
R
RCV
||
+
-----------------R
+
+
=
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| L8561_11 | 制造商:UTC-IC 制造商全稱(chēng):UTC-IC 功能描述:POWER FACTOR CORRECTOR |
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