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3. TECHNICAL BRIEF
3.4 FEM (DGM1110M014, FL601)
GSM850/900 TX
DCS/PCS TX
GSM850/900 RX
DCS/PCS RX
The FEM is integrated of quadband RX SAWs, internal diplexer and ESD protection at Ant port to 8kV
acc.
LGE Internal Use Only
ANT_SW1
L
H
L
H
Figure 3-4-1 Band SW Logic Table
GND6
20
GND5
19
GND4
2V75_VCXO
18
GND3
16
GND2
11
GND1
9
R612
VDD
12
10
VC2
C628
13
C632
VC1
0.1u
39p
14
DGM1110M014
Figure 3-4-2 FEM CIRCUIT DIAGRAM
- 26 -
GSM850_900_TX
15
GSM1800_1900_TX
10
GSM1900_RX2
8
GSM1900_RX1
7
GSM1800_RX2
6
GSM1800_RX1
5
GSM900_RX2
4
GSM900_RX1
3
GSM850_RX2
2
GSM850_RX1
1
FL601
ANT_SW1
ANT_SW2
C643
C644
100p
100p
Copyright © 2009 LG Electronics. Inc. All right reserved.
ANT_SW2
H
H
L
L
Only for training and service purposes
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