PBL38812 데이터 시트보기 (PDF) - Ericsson
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PBL38812 Datasheet PDF : 10 Pages
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Figure 7. Transmitter channel input
amplifier used to suppress ripple in the
mic. supply. (CMRR).
R1 = R2 ≈ 3k
R3 = R4 ≈ 100k
R5 = R6
C1 = C2
PBL 388 12
+
R7
R6
R5
C4
C2
C1
Mic.
C3
F2
Ref.
R4
- F1+ R3
R2
2
R1
3
16
Figure 8. Transmitter and receiver
channel rectifier characteristics.
Figure 9. Relationship in timing between
the voltage levels at TxIn, TxDet and NDet
VRxDet
+600
+400
+200
V ref ≈ 2V Vref
-200
-400
-600
2.5
5.0
7.5
10
V Rx in
mVp
0.5
1.0
1.5
V Tx in
V TxDet
Txin
TxDetout
Figure 10. Transmitter and receiver
channel output dynamics.
N Det
V Txout
(mV)
500
400
300
200
100
2.4
2.6
2.8
3.0
3.2
3.4
V+ (V)
V Rxout
(mV)
500
400
300
200
100
2.4
2.6
2.8
3.0
3.2
3.4
V+ (V)
7
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