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AM7953X-2JC Datasheet(PDF) 16 Page - Advanced Micro Devices

Part # AM7953X-2JC
Description  Subscriber Line Interface Circuit
PDF  20 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM7953X-2JC Datasheet(HTML) 16 Page - Advanced Micro Devices

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Am7953X Data Sheet
TEST CIRCUITS
IL2-4 = –20 log (VTX / VAB)
A. Two- to Four-Wire Insertion Loss
VAB
RL
2
RL
2
A(TIP)
B(RING)
VTX
RSN
AGND
SLIC
VAB
A(TIP)
B(RING)
VTX
RSN
AGND
SLIC
RL
IL4-2 = –20 log (VAB / VRX)
BRS = 20 log (VTX / VRX)
B. Four- to Two-Wire Insertion Loss and Balance Return Signal
RT
RT
RRX
RRX
VRX
VL
VAB
A(TIP)
B(RING)
VTX
RSN
AGND
SLIC
VL
S2 Open, S1 Closed:
L-T Long. Bal. = 20 log (VAB / VL)
L-4 Long. Bal. = 20 log (VTX / VL)
S2 Closed, S1 Open:
4-L Long. Sig. Gen. = 20 log (VL / VRX)
C. Longitudinal Balance
RT
RRX
VRX
S2
RL
2
RL
2
S1
VL
C
Note:
ZD is the desired impedance (e.g., the
characteristic impedance of the line).
RL = –20 log (2 VM / VS)
VM
A(TIP)
B(RING)
VTX
RSN
AGND
SLIC
RT
RRX
VS
900
Ω
R
R
ZIN
D. Two-Wire Return Loss Test Circuit
1
ωC
<< RL
IDC



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