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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Figure 3.3.2 Band SW Logic Table
Figure 3.3.3 FEM CIRCUIT DIAGRAM
outputs to the four receive pads are connected to the antenna pad through a PHEMT RF switch. The GaAs die,
PHEMT die, Silicon (Si) die and passive components are mounted on a multi-layer laminate substrate. The
assembly is encapsulated with plastic overmold.
TX_EN BS1 BS2
STANDBY
0XXX
RX1
1000
RX2
1001
RX3
1011
RX4
1010
LB_TX
110X
HB_TX
111X
Mode VLOGIC
Input Control Bits
1. X = DON’T CARE
2. RX1, RX2, RX3, and RX4 are broadband receive ports and each supports the GSM850, GSM900, DCS, and PCS bands.
R408 110
13
RX3
RX4
14
4
TX_EN
VBATT
30
2
VLOGIC
VRAMP
3
GND3
8
9
GND4
GND5
10
15
GND6
GND7
16
18
GND8
19
GND9
27
GSM_IN
31
PGND1
PGND2
32
33
PGND3
PGND4
34
35
PGND5
PGND6
36
11
RX1
RX2
12
ANT
17
5
BS1
BS2
6
29
DCS_PCS_IN
1
GND1
GND10
20
21
GND11
GND12
22
GND13
23
GND14
24
25
GND15
GND16
26
GND17
28
GND2
7
U400
SKY77531
SMRH0005201
VBAT
L404
2.2nH
1000p
C410 C412
1000p
1KR403
R406 110
R405 110
1000p
C409 C411
39p
R402 110
C408
1000p
VLOGIC
BS2
TX_RAMP
BS1
TX_EN
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