Based on the Si4210 Aero II GSM/GPRS transceiver, the Aero EDGE Radio provides acomplete turnkey reference design for a quad-band GSM/GPRS/EDGE radio. The AeroEDGE Radio has the smallest footprint and fewest components of any EDGE radio onthe market today, enabling customers to achieve high data rates while maintainingsmall form factors. The Si4210 receiver uses a digital low-IF architecture that supportsboth GMSK and 8-PSK modulation. The 8-PSK transmitter is formed with a companionchip that includes a direct upconversion mixer and a variable gain amplifier (VGA). Thetransmit SAW provides additional margin to filter unwanted phase noise produced bythe companion chip. The power amplifier (PA) is programmable to support eitherGMSK or 8-PSK mode and operates open loop with no external components requiredfor feedback.
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