Figure 56 RF block diagram RM-313 using RF ASIC N7505
The RF block diagram for RM-313 uses RF ASIC N7505 that performs the RF back-end functions of receive and
transmit function of the cellular transceiver.
An analogue signal is received by the phone's antenna. The signal is converted to a digital signal and is then
transferred further to the baseband (eg. to the earpiece).
The receiver functions are implemented in the RF ASIC.
Signals with different frequencies take different paths, therefore being handled by different components.
The principle of GSM and WCDMA is the same.
Page 6 –28
Copyright © 2007 Nokia. All rights reserved.