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Functional Description
Txin
Txip
Txqn
Txqp
Transceiver
Rxin
Rxip
Rxqn
Rxqp
U341
TxGSM
Tx-VCO
TxDCS/PCS
Fref
LO
26 MHz
U342
LE
CLK
Data
LNA
Figure 5.3. Functional block diagram
Switch Mode
VC1
0.0 V − 0.2 V
GSM-TX
2.4 V − 2.8 V
DCS-TX
0.0 V − 0.2 V
GSM/DCS-RX
– 5-4 –
TxGSM
Quad-band
PA
TxDCS/PCS
PA module
U301
F321
GSM
RF SAW
F322
DCS/PCS
RF SAW
VC2
2.4 V − 2.8 V
0.0 V − 0.2 V
0.0 V − 0.2 V
ANT
Quad-band
TR switch
U321
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