Challenges in the RF design of highly integrated Direct Conversion Receivers for Multi-band, Multi-standard Applications
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Date: 02-03-2006
Start Time:
2:00pm
End Time: 3:00pm
Speaker: Prof. Francesco Svelto
From:
University of Pavia, Italy
Location: Interschool lab CEPSR
Hosted by:
Integrated System Laboratory
The demanding dynamic range required by receivers for wireless wide area networks still make the design of low-power highly integrated CMOS solutions a topic of intense research. This presentation starts discussing highly linear direct down-converters and low-power quadrature generators, based on injection locked dividers, tailored to fully integrated cell-phone receivers. Getting rid of external components is even more important in multi-standard applications, where several transceivers are likely to coexist on the same PCB. Reconfigurable front-ends, based on a voltage-voltage feedback LNA topology and the highly linear mixer, are introduced. Implementation examples include a 0.13mm CMOS DCS1800/UMTS/IEEE802.11b and g, and a 0.25mm BiCMOS 5-6GHz multi-standard WLAN. Finally, the potentials of a multi-resonance feedback LNA are exploited in a 0.18mm CMOS front-end for multi-band OFDM UWB applications, operating in the 3.1GHz-8GHz frequency range.