IQ Demodulator
I Channel
EL71 RF Diagram
GSM LNA
BATT+
1
2
internal antenna external antenna
2 2
VDD_RF1
1/2
IQ Demodulator VDD_RF2
DC autocalibration
mechanical
antenna
antenna
DCS LNA
matching
switch
Q Channel
RF_BAND_SW
1
2
2
FEM RF_FE_CTR_GSM
Hitachi
RF_FE_CTR_DCS
HWXQ411/413
PCS LNA
26MHz
to Power Asic PM_SIN26M
26MHz
2
26MHz
BB_SIN26M
to Baseband
integr. integr.
26MHz 26MHz
RF VCO IF VCO
2 26MHz
RF PLL IF PLL
3476-3980MHz 640-656MHz
to Bluetooth
PF_SIN26M
CP PFD R CP PFD R
26MHz
1 1
VCXO
D D
2
RF_AFC
1 1
postfilter postfilter
RF_FE_CTR_GSM
GSM 1/4 26MHz
Crystal
XCS 1/2
RF_FE_CTR_DCS
1/2
external external
TVCXO
RF loopfilter IF loopfilter
TXLO
State
RF_STR
machine
1/2
RF_DAT
RF_CLK
PA Serial
PARAMP
Agilent LDO
Interface
Sub loop
QCPM8861 down converter
RF_QX
RF_Q
850/900 MHz
DIRCOUPLER RF_I
integr.
RF_IX
IQ Modulator
TXVCOs
PM Detectors
DIRCOUPLER
DPD 1
2
APD
1800/1900 MHz postfilter GMSK
EDGE
external
PM loopfilter
AM Detectors
VIC
postfilter
VID
external
AM loopfilter
RF_RAMP1
Gain controller
TXLO
ATT
Transceiver IC
&
Combiner
ATT
Renesas HD155153
50R
Main loop
down converter
BATT+
RF_BAND_SW
TX_ON
Baseband