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AM79R70SC датащи(PDF) 15 Page - Advanced Micro Devices

номер детали AM79R70SC
подробное описание детали  Ringing Subscriber Line Interface Circuit
PDF  20 Pages
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производитель  AMD [Advanced Micro Devices]
домашняя страница  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79R70SC датащи(HTML) 15 Page - Advanced Micro Devices

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SLIC Products
15
TEST CIRCUITS (continued)
VCC
A(TIP)
B(RING)
DET
E1
6.2 k
Ω
RL = 600 Ω
15 pF
E. Loop-Detector Switching
A(TIP)
B(RING)
F. Ground-Key Switching
RG
D. Two-Wire Return Loss Test Circuit
R
R
Return loss = –20 log (2 VM / VS)
ZD: The desired impedance;
e.g., the characteristic impedance of the line
VM
ZIN
VS
A(TIP)
B(RING)
AGND
VTX
RSN
SLIC
RT2
RRX
CT1
RT1
ZD
G. RFI Test Circuit
50
Ω
L1
200
Ω
200
Ω
C1
C2
B
HF
GEN
VTX
A
SLIC
under test
L2
CAX
33 nF
CBX
33 nF
RF1
RF2
50
Ω
50
Ω
1.5 Vrms
80% Amplitude
Modulated
100 kHz to 30 MHz



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