LG GT500 - Page 66

- 67 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. TECHNICAL DESCRIPTION
Figure 3-7-8. WCDMA PAM schematic
3.7.3. WCDMA/EDGE/GPRS/GSM RF block
The transceiver is a multi-mode transceiver for WCDMA/EGDE/GPRS/GSM.
The EDGE/GPRS/GSM part of the transceiver use a digital baseband interface that is shared between
received and transmitted data. The receive interface is based on I and Q data and the transmitter interface
is based on envelope and frequency data.
The WCDMA part of the transceiver use differential analog in-phase and quadraturephase interfaces, that
is an IQ-interface, in the receiver and the transmitter data paths.
The EDGE/GSM/GPRS part of the transceiver has the following general features:
•Power class
- GMSK low bands: Class 4 (33 dBm)
- GMSK high bands: Class 1 (30 dBm)
- 8PSK low bands: Class E2 (27 dBm)
- 8PSK high bands: Class E2 (26 dBm)
- WCDMA: class 3 (+24dBm)
WCDMA PA Block
R120
24
L100
18p
C122 22p
C158
1000p
NA
C117
0.1u
7
GND4
8
GND5
9
GND6
1
RX
TX
3
C101
1
OUT
4
TER
FL100 SAYFP1G95AA0B00
ANT
6
GND1
2
GND2
4
GND3
5
U103 LDC151G8620Q-359
COU
3
IN
2
3.6nH
C124
GND3
12
14
GND4IN_BAND_2
2
6
IN_BAND_5
13
OUT_BAND_2
OUT_BAND_5
9
PGND
15
10
VBIAS
VC2
11
4
VCC1
VCONT
5
VEN_BAND_2
1
7
VEN_BAND_5
SKY77175U105
3
GND1
GND2
8
C138 DNI
22p
DNIC151
C121
C143
0.5p
C115
1000p 1000p
C116
C133 DNI
56
R117
0.1u
C154
GND3GND4
GND5
GND6
RX
TX
ACMD-7407FL101
ANT
GND1
GND2
DAP
7
4
ENGND
3
OUT
6
5
REF
2
RF_IN
VDD
1
U100 LMV221
U104
3
COU
2
IN
OUT
1
TER
4
100pC135
LDC151G8620Q-359
1000p C137
8
VCONT
3
VEN
4
DNI
R113
U107 SKY77181
GND1
5
GND2
6
PGND
9
2
RF_IN
7
RF_OUT
VBIAS
1
VCC
R121
56
GND2
GND3GND4
GND5
GND6
RX
TX
LT5 6BFL102
ANT
GND1
C106
33nF
0.1u
C149
C142 22p
C150
1000p
1.8nH
VBAT
100pC146
L101
VBAT
100pC145
L103
8.2nH
DNI
C156
C152
6.8nH
C119 100p
R100
DNI
1000p
C102
C118
NA
0.1u
C134 100p
C110
0.1uF C120
R103
120
C147 22p
VBAT
C157
1000p
R116 DNI
R104
75
C105 22p
10u
C148
R1180
R109
56
RFIN
6
RFOUT
4
VBIAS VCC
5
VCTRL
2
VENB
1
10u
C155
U102 SKY77182
7
GND1
GND2
8
PGND
9
3
C104 22p
1000p
C153
1K
R102
1000p C141
C127
VRAD_2V8
VDDA_2V8
L601
2.2nH
DNI
C103 0.1uF
DNIC123
COU
32
IN
OUT
1
TER
4
U106 LDC15874M19Q-360
R652
0
C100
10u
R107
10
1.5p C128
0
R101
C636
3.3nH
C111
22p
C144 22pDNI
C136
WRX_BAND_1
WTX_BAND_2_EN
WTX_BAND_2_TO_PA
WRF_BAND_1
WRF_BAND_2
WRF_BAND_8_5
VCC_WPA
BIAS_CTRL
BIAS_CTRL
WTX_BAND_1_EN
WTX_BAND_1_TO_PA
WPOW_DET_EN
WRX_BAND_8_5
WRX_BAND_2
WPOW_DET
WTX_BAND_8_5_EN
WTX_BAND_8_5_TO_PA
BIAS_CTRL