PBL 3786
Tx
det
Rx
det
A
B
E
Full transmit level
C
D
F
G
CMP
Full receive level
Figure 12. Transmit and receive detector output and comparator input CMP timing wave forms.
m
V
p
0.1mA
+600
+400
+200
27K
V
250K
22 K
CTR
(pin 14)
( 3.2V pin 15)
3.0
3.4
V+(V)
Figure 13. Transmit and receiver detector output dynamics
versus V
+
.
Figure 14. The control input voltage V
CTR
, from full duplex to
full speech control.
V
TxDet
mV
+600
Mode
+400
+200
Full
duplex
V
ref
≈1.9V
V
ref
-200
-400
0.5
1.0
1.5
V
Tx in
mV
Full speech
control
5.0
10.0
V
Rx in
-40
-20
Mute
20
I
CTR
µA
-600
V
RxDet
Figure 15. Transmit- and receive-channel rectifier characteristics.
8
Figure 16. Control input modes, at pin 10.
ERICSSON [ ERICSSON ]
