RF description
Block diagram
Figure 81 RF block diagram using RF ASIC N7505
The RF block diagram uses RF ASIC N7505 that performs the RF back-end functions of receive and transmit
function of the cellular transceiver.
Receiver (RX)
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 routes, being handled by different components. The principle
of GSM and WCDMA is the same.
RM-356
System Module and User Interface
Issue 1 COMPANY CONFIDENTIAL Page 6 –39
Copyright © 2008 Nokia. All rights reserved.
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