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LGE Internal Use Only
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
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3.2.4 Front End Module(LMSP4DNA-883)
Ŷ
SAW front end module for mobile telephone systems
Ŷ
Covering GSM850, GSM900, GSM1800, GSM1900 bands
Ŷ
Integration of GSM 850, EGSM, DCS, PCS RX SAWs
Ŷ
Balanced outputs of all RX ports
FEM(FL101) has two logic inputs, which are VC1, VC2, for selecting RX/TX-mode and low/high-band operation
[Table 3.2.4-1] FEM control logic
[Figure 3.2.4-1] FEM schematic
L102
100n
SW101
G2
ANT
RF
G1
FL101
836.5 ,1880MHz
20
19
13
11
18
15
8
14
7
12
6
9
5
4
10
3
16
2
1
71
T
N
A
GSM850RX1
GSM850RX2
GND4
GSM900RX1
VC2
GSM900RX2
GSM1800RX1
GND1
GSM1800RX2
GND2
GSM1900RX1
VC1
GSM1900RX2
GSM850_900TX
GND5
GSM1800_1900TX
GND3
NC1
NC2
100p
C114
C117
100p
100p
C124
C125
100p
C129 100p
ANT_FEED
GND
RF_ANT_SW2
RF_ANT_SW1
Содержание LG-S310
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