pbl388131sot ETC-unknow, pbl388131sot Datasheet - Page 7

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pbl388131sot

Manufacturer Part Number
pbl388131sot
Description
Voice-switched Speakerphone Circuit With Built Loudspeaker Amplifier
Manufacturer
ETC-unknow
Datasheet
Figure 10. Transmitter and receiver
channel rectifier characteristics.
Figure 11. Relationship in timing between
the voltage levels at Tx
Figure 9. Transmitter channel input
amplifier used to suppress ripple in the
mic. supply. (CMRR).
R1 = R2
R3 = R4
R5 = R6
C1 = C2
Figure 12. Transmitter and receiver
channel output dynamics.
3k
100k
In
, Tx
Det
and N
Det
500
400
300
200
100
V
Txout
(mV)
2.4
2.6
A
2.8
+
R7
C4
3.0
+600
+400
+200
R5
R6
3.2
TxDetout
N Det
Txin
3.4
Mic.
0.5
C3
V+ (V)
C2
C1
1.0
1
R4
2
500
400
300
200
100
R2
V
(mV)
R
R1
xout
2.4
1.5
-
F
F
1
2.6
2
+
16
Ref.
R3
388 13
2.8
PBL
3.0
PBL 388 13
3.2
time
3.4
V+ (V)
7

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