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internal
AL21 - RF Diagram frontend
antenna GSM 850 LNA
external
antenna
1 BATT+
869-894 MHz 2
antenna
mechanical
matching DC autocalibration
antenna GSM 900 LNA IQ demodulator
switch 1/2
925-960 MHz
VDD_RF1
1 VDD_RF2
GSM 1800 LNA 2
IQ demodulator
BANDSW
1805 - 1880 MHz
PA_RAMP
RF_FE_DCR_GSM
1930 - 1990 MHz State RF_FE_DCR_DCS
machine TXONPA
GSM 1900 LNA
Basebend
Serial
RFCLK
Interface
RFSTR
FEM incl. RFDATA
SAW &
1/2
PIN-diode integr. RF VCO 1/4 26_MHz_BB
switch and RF_FE_DCR_GSM 3476 - 3980
matching MHz RF PLL CP PFD
+
D integr. IF VCO 26_MHz_BT
1
1/2 640 - 656 MHz TVCXO
R
CP PFD D
RF_FE_DCR_DCS VCXO 1 + 1
Crystal 26 MHz AFC_PNM
R
AFC_PNM 26MHz PCN GSM 1
TXONPA
26MHz
PA Varicap
Analogue /
Hitachi Digital Phase -
Internal power to Baseband frequency
control using to Bluetooth detector IQ modulator
PA_RAMP
"current sensing" 3rd output
RF_I
Feedback filter RF_IX
Vapc
850/900 + 1
PD
1/2 2
charge phase
1/2 pump detector RF_Q
RF_QX
1800/1900
Integrated 4 GHz Transceiver IC
TX-VCO Bright 6 E
BATT+
radio part base band