L9217G Просмотр технического описания (PDF) - Agere -> LSI Corporation
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L9217G Datasheet PDF : 30 Pages
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Data Sheet
November 2001
Description (continued)
L9217A/G Low-Cost Line Interface
with Reverse Battery and PPM
POWER CONDITIONING AND REFERENCE
FORWARD AND REVERSE BATTERY
+
AX
– β = 41 V/A
RECTIFIER
3
DCOUT
VTX
TG
TXI
AAC
VITR
β = 9.66
–
PPMOUT
PT
A=1
+
PPM
PPMIN
TIP/RING
CURRENT
SENSE
β=5
–
RCVN
+
PR
A = –1
+
RCVP
–
A VERSION GAIN = 3.93
G VERSION GAIN = 1
LOOP CLOSURE DETECTOR
LCTH
B0
BATTERY FEED
B1
STATE CONTROL
B2
+
–
RTSP
+
RING TRIP DETECTOR
RTSN
–
NSTAT
Figure 1. Functional Diagram
12-3557 (F)
Agere Systems Inc.
3
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