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參數(shù)資料
| 型號(hào)： | L9310 |
| 英文描述： | Line Interface and Line Access Circuit Full-Feature SLIC,Ringing Relay,and Test Access Device |
| 中文描述： | 線路接口和線路接入電路全功能用戶接口，振鈴繼電器，測(cè)試接入設(shè)備 |
| 文件頁(yè)數(shù)： | 52/60頁(yè) |
| 文件大小： | 1053K |
| 代理商： | L9310 |
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Data Sheet
July 2001
Full-Feature SLIC, Ringing Relay, and Test Access Device
L9310 Line Interface and Line Access Circuit
52
Agere Systems Inc.
ac Applications
(continued)
First-Generation Codec ac Interface Net-
work: Complex Termination
(continued)
Receive Gain
Ratios of R
RCV
, R
T3
, R
GP
will set both the low-frequency
termination and receive gain for the complex case. In
the complex case, additional high-frequency compen-
sation, via C
N
, R
N1
, and R
N2
, is needed for the return
loss characteristic. For resistive termination, C
N
, R
N1
,
and R
N2
are not used and RCVN is tied to ground via a
resistor.
Determine the receive gain, g
RCV
, taking into account
the impedance transformation in a manner similar to
transmit gain.
R
X
(dB) = R
X (specified[dB])
+ 20 log
R
X
(dB) = 20 log g
RCV
Then:
g
RCV
=
and low-frequency termination
Z
TER(low)
=
+ 2R
P
+ 76
Z
TER(low)
is the specified termination impedance assum-
ing low frequency (C or C
′ is open).
R
P
is the series protection resistor.
These two equations are best solved using a computer
spreadsheet.
Next, solve for the high-frequency return loss compen-
sation circuit, C
N
, R
N1
, and R
N2
:
C
N
R
N2
=
C
G
R
TGP
R
N1
= R
N2
There is an input offset voltage associated with nodes
RCVN and RCVP. To minimize the effect of mismatch
of this voltage at T/R, the equivalent resistance to ac
ground at RCVN should be approximately equal to that
at RCVP.
Hybrid Balance
Set the hybrid cancellation via R
HB
.
R
HB
=
EQ
600
R
1
R
T3
---------------
R
GP
---------------
+
+
-----------------------------------------------
R
GP
1
-----------
R
RCV
---------------
+
+
--------------------------------------------
P
-2R
76
+
(
)
2400
2400
+
2R
P
76
(
)
-----------------------------------------------
TGS
R
TGP
1
–
g
RCV
g
TX
×
------------------------------
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| L9311 | 制造商:AGERE 制造商全稱:AGERE 功能描述:Line Interface and Line Access Circuit Full-Feature SLIC with High Longitudinal Balance, Ringing Relay,and GR-909 Test Access |
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| L9313 | 制造商:AGERE 制造商全稱:AGERE 功能描述:Line Interface and Line Access Circuit Full-Feature SLIC and Ringing for TR-57 Applications |
| L9324 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Dual Peripheral Driver |
| L9326 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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