[maemo-users] Nokia device usage

From: Jean-Christian de Rivaz jc at eclis.ch
Date: Wed Mar 11 20:54:45 EET 2009
John Holmblad a écrit :
> http://www.smta.org/files/CTEA_High_Density_Pkg_Trends-Carey-Portelligent.pdf 
> You can see,  from viewing the iphone PCB discussed on pp 13-17 of that 
> presentation. that, in addition to having separate power amps for each 
> of 3 frequency band groupings (it is a quad band device). the device 
> also has a Multi-chip package (MCP) to handle both a GSM/EDGE chip as 
> well as a WCDMA chip needed for 3g baseband processing.  I could foresee 
> that another designer, with an application that did not require 2G 
> "backward compatibility", might :design out:   the 2G chip ( "hold the 
> 2g" if you will) in order to save space and power in the design. This, 
> however, would make the device un-useable in a network that was not 100% 
> 3G/UMTS, UNLESS the device was being used ONLY for non-voice data access 
> and not for "traditional" voice.


Nokia will more likely use this kind of integration:


The Quad-band GSM/GPRS/EDGE + Dual-band UMTS/HSPDA chain use 1 chip for 
the baseband, 1 chip for the transceiver and 1 chip for the amplifier.

Best Regards,
Jean-Christian de Rivaz

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