User Guide

NMM-3 Company Confidential
7 - System Module & UI CCS Technical Documentation
Page 7-30 Copyright  2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
RF block diagram
General
The GSM and WCDMA RF engines are based on direct conversion architecture.
GSM TX/RX design is based around the HELGO RF ASIC.
The WCDMA RX design is based around the REX ASIC. The WCDMA TX design uses TEX
ASIC as the modulator and the 1st AGC stage with HEX ASIC as the driver amplifier
including the 2
nd
AGC stage.
TXC UEME HELGO,
WCDMA PA
SMPS
GSM transmitter power control,
WCDMA PA SMPS converter control
Table 3: Analog signals
Signal name From To Function
TXIQ
TEX
REX
VCTCXO
HELGO
TxPwrDet
IPA1
Antenna.
switch
module
LNA inputs
VCO
SMPS
VBAT
HEX
MUX
MUX
MOD
Synthesizer
DEMOD
VCO
Synthesizer
RXIQ
Synthesizer
Modulator
Demod
GRXIQ
GTXIQ
VCO
RFClk
AFC
RFBus