參數(shù)資料
型號: AM79M535
廠商: Advanced Micro Devices, Inc.
英文描述: Metering Subscriber Line Interface Circuit
中文描述: 計(jì)量用戶線接口電路
文件頁數(shù): 15/18頁
文件大?。?/td> 172K
代理商: AM79M535
SLIC Products
15
TEST CIRCUITS
A(TIP)
VTX
B(RING)
RSN
AGND
R
T
R
RX
V
L
V
AB
V
AB
R
L
A(TIP)
B(RING)RSN
AGND
VTX
R
T
V
RX
R
RX
I
L2-4
=
20 log (V
TX
/ V
AB
)
A. Two- to Four-Wire Insertion Loss
I
L4-2
=
20 log (V
AB
/ V
RX
)
BRS = 20 log (V
TX
/ V
RX
)
B. Four- to Two-Wire Insertion Loss and Balance Return Signal
A(TIP)
VTX
B(RING)RSN
AGND
R
T
R
RX
V
L
S2
V
RX
V
L
C
S1
V
S
Z
D
R
R
V
M
Z
IN
A(TIP)
B(RING)
R
T
R
RX
S1 Closed, S2 Open
L-T Long. Bal. =
20 log (V
AB
/ V
L
)
L-4 Long. Bal. =
20 log (V
TX
/ G
TX
V
L
)
S2 Closed, S1 Open
4-L Long. Sig. Gen. =
20 log (V
L
/ V
RX
)
C. Longitudinal Balance
Note:
Z
D
is the desired impedance (e.g., the charac-
teristic impedance of the line.)
R
L
= 20 log (2 V
M
/ V
S
)
D. Two-Wire Return Loss Test Circuit
SLIC
SLIC
SLIC
SLIC
R
TMG
V
MG
VTX
RSN
R
L
2
R
L
2
R
L
2
R
L
2
1/
ω
C << R
L
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