
3. TECHNICAL BRIEF
- 33 -
LGE Internal Use Only
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.3.2 Band SW Logic Table
Figure 3.3.3 FEM CIRCUIT DIAGRAM
1 Rx1 and Rx2 are broadband receive ports and each supports the GSM850, GSM900, DCS,
and PCS bands.
6.8n
L417
3.3n
L426
C427
3.9p
FL400
10
5
3
2
6
4
7
8
9
1 I1
O1-1
O1-2
O2-1
I2
O2-2
1
G
2
G
3
G
4
G
3.9p
C428
DNI
C490
C492
DNI
L425
3.3n
C489
DNI
C429
10u
L423
15n
1n
C415
R410
110
1p
C426
DNI
C491
L414
1.5n
VBAT
L411
2.2nH
2.2nH
L410
L413
1.5n
C425
1.2p
1K
R407
L412
2.2nH
C410
39p
15n
L424
1n
C420
R412
110
C424
33p
R406 110
C407
1n
U400
29
23
24
25
26
27
28
5
1
6
1
7
1
8
1
9
1
0
2
1
2
2
2
8
7
6
5
4
3
2
1
14
13
12
11
10
9
Tx_LB_IN
Tx_HB_IN
VSW_EN
BS
RSVD1
RSVD2
1
D
N
G
2
D
N
G
1
T
T
A
B
V
2
T
T
A
B
V
3
D
N
G
4
D
N
G
5
D
N
G
6
D
N
G
7
D
N
G
2
x
R
3
D
V
S
R
1
x
R
D
V
S
R
N
E
x
T
P
M
A
R
V
8
D
N
G
GND9
GND10
ANT
GND11
GND12
GND13
PGND
L418
6.8n
RF_TX_RAMP
RF_HB_TX
RF_LB_TX
RF_HB_RXN
RF_LB_RXN
RF_LB_RXP
RF_TX_EN
RF_BS
RF_VLOGIC
RF_HB_RXP