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IQ Demodulator
EL71 RF Diagram I Channel
GSM LNA

BATT+
1 2
internal antenna external antenna
2 2
VDD_RF1


mechanical
IQ Demodulator 1/2
DC autocalibration VDD_RF2
antenna
antenna DCS LNA
matching
switch Q Channel

1 RF_BAND_SW
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
26MHz integr. 26MHz integr.
RF VCO IF VCO
2 RF PLL 3476-3980MHz IF PLL 640-656MHz 26MHz
to Bluetooth
PF_SIN26M
CP PFD R CP PFD R 26MHz
1 1
VCXO
2 D D
1 1 RF_AFC
postfilter postfilter
RF_FE_CTR_GSM
GSM 1/4 26MHz
XCS 1/2 Crystal
RF_FE_CTR_DCS 1/2
external external
TVCXO
RF loopfilter IF loopfilter
RF_BAND_SW




Baseband
TXLO State
TX_ON

BATT+




RF_STR
machine
1/2 RF_DAT

PA PARAMP
Serial RF_CLK

Agilent LDO Interface
Sub loop
QCPM8861 down converter
RF_QX

RF_Q
850/900 MHz
DIRCOUPLER RF_I

integr.
IQ Modulator RF_IX
TXVCOs PM Detectors
DIRCOUPLER
DPD 1 2

APD
1800/1900 MHz postfilter GMSK

external EDGE
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