LG GD910 - GSM Power Amplifi er Module

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. RF Circuit Technical Brief
GD910 service manual
4.4 GSM Power Amplifier Module
[Figure 4.4-1] Schematic Diagram of 2.5G PAM(TQM7M5005)
[Table 4.4-1] TQM7M5005 Pin description
C455
0.1u
R408 1.2K
C451
10n
U402
BS
313
BY_CAP1
BY_CAP2
9
1
DCS_PCS_INDCS_PCS_OUT
12
14
GND1
GND2
11
GND3
8
7
GSM850_900_IN
10
GSM850_900_OUT
2
MODE_SELECT
15
PGND
TX_EN
6
4
VBATT
5
VRAMP
TQM7M5005
C449
1.5p
L405
27nH
C453
33p
18p
C454
VBAT
L406
2.7nH
C509
6.8p
39p
C456
10u
C448
10n
C450
2G_BS
PA_LEVEL
PA_MODE
LBAND_IN
TXON_PA
HBAND_IN