LG GW520 - 4 RF Circuit Technical Brief; General Description

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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
GW520 service manual
4.1 General Description
The PMB 6952 SMARTi 3GE combines the SMARTiPM quad-band GSM/EDGE and SMARTi3G triple-
band W-CDMA transceivers in a laminate based PG-TFSGA-121-2 package. A significant circuit board
area reduction is achieved compared to using separately packaged transceivers. SMARTiPM is a
quad-band transceiver for GSM850/GSM900/ GSM1800/GSM1900 voice and data applications.
SMARTiPM features a direct conversion receiver and a quad-band polar modulator transmitter
for
[Figure 4.1-1] Block Diagram of RF part
TQM7M5005
LNA
Switch
SAW
MODE
FEM(LSHSP43QL -771)
-
PGA
Polar
Modulator
/4
/2
3.8GHz
Fractional
N - PLL
ADC
Sigma - Delta
Modulato
r
Loop filte
r
RX
1800MHz
RX
1900MHz
TX
850/900MHz
TX
1800/1900MHz
PMB8878
S -GOLD ® 3H
PA_LEVEL
I/IX
Q/QX
H/LBAND
TXON_PA
AFC
RF_EN
RF_DA
RF_CLK
PA_LEVEL
PA_BAND
TXON_PA
MODE
3- Wire
Bus
interface
26MHz_MCLK
BT_CLK
Decoder
ANT_SW1
ANT_SW2
RF Control
Unit
GSM
Timer Unit
26MHz
VCTCXO
26MHz_MCLK
RF2.85V
VBAT
PA
Control
Hardware
RX
900MHz
3G DUPLEXER
Rx RF SAW
3G LNA
Tx RF SAW
3G PAM
Rx
Tx
PMB6821
(SM-Power)
RF2.85V
RF1.5V
VBAT
PA_EN
PA_MODE
PA_EN
PA_MODE
TXI/TXI
X
TXQ/TXQ
X
EN/DATA/CLK
PMB6952(SMARTi PM)
LNA
Switch
MODE
PGA
Polar
Modulator
/4
/2
3.8GHz
Fractional
N - PLL
ADC
Sigma - Delta
Modulato
r
Loop filte
r
RX
1800MHz
RX
1900MHz
TX
850/900MHz
TX
1800/1900MHz
PA_LEVEL
I/IX
Q/QX
TXON_PA
AFC
RF_EN
RF_DA
RF_CLK
PA_LEVEL
PA_BAND
TXON_PA
MODE
3- Wire
Bus
interface
26MHz_MCLK
BT_CLK
Decoder
ANT_SW2
RF Control
Unit
GSM
Timer Unit
26MHz
VBAT
PA
Control
Hardware
900MHz
3G BAND1
Rx RF SAW
3G LNA
3G PAM
Rx
Tx
PMB6821
(SM-Power)
RF2.85V
RF1.5V
VBAT
(SM-Power)
RF2.85V
RF1.5V
VBAT
PA_EN
PA_MODE
PA_EN
PA_MODE
TXI/TXI
X
TXQ/TXQ
X
EN/DATA/CLK
RX
850MHz
3G BAND8
t
LNA
Switch
SAW
MODE
FEM(LSHSP43QL -771)
-
PGA
Polar
Modulator
/4
/2
3.8GHz
Fractional
N - PLL
ADC
Sigma - Delta
Modulato
r
Loop filte
r
RX
1800MHz
RX
1900MHz
TX
850/900MHz
TX
1800/1900MHz
PMB8878
S -GOLD ® 3H
PA_LEVEL
I/IX
Q/QX
H/LBAND
TXON_PA
AFC
RF_EN
RF_DA
RF_CLK
PA_LEVEL
PA_BAND
TXON_PA
MODE
3- Wire
Bus
interface
26MHz_MCLK
BT_CLK
Decoder
ANT_SW1
ANT_SW2
RF Control
Unit
GSM
Timer Unit
26MHz
VCTCXO
26MHz_MCLK
RF2.85V
VBAT
PA
Control
Hardware
RX
900MHz
3G DUPLEXER
Rx RF SAW
3G LNA
Tx RF SAW
3G PAM
Rx
Tx
PMB6821
(SM-Power)
RF2.85V
RF1.5V
VBAT
PMB6821
(SM-Power)
RF2.85V
RF1.5V
VBAT
PA_EN
PA_MODE
PA_EN
PA_MODE
TXI/TXI
X
TXQ/TXQ
X
EN/DATA/CLK
PMB6952(SMARTi PM)
LNA
Switch
MODE
PGA
Polar
Modulator
/4
/2
3.8GHz
Fractional
N - PLL
ADC
Sigma - Delta
Modulato
r
Loop filte
r
RX
1800MHz
RX
1900MHz
TX
850/900MHz
TX
1800/1900MHz
PA_LEVEL
I/IX
Q/QX
TXON_PA
AFC
RF_EN
RF_DA
RF_CLK
PA_LEVEL
PA_BAND
TXON_PA
MODE
3- Wire
Bus
interface
26MHz_MCLK
BT_CLK
Decoder
ANT_SW2
RF Control
Unit
GSM
Timer Unit
26MHz
VBAT
PA
Control
Hardware
900MHz
3G BAND1
Rx RF SAW
3G LNA
3G PAM
Rx
Tx
PMB6821
(SM-Power)
RF2.85V
RF1.5V
VBAT
(SM-Power)
RF2.85V
RF1.5V
VBAT
PA_EN
PA_MODE
PA_EN
PA_MODE
TXI/TXI
X
TXQ/TXQ
X
EN/DATA/CLK
RX
850MHz
3G BAND8
4. RF Circuit Technical Brief