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A novel autotransformer impedance transformation technique to improve the power efficiency of RF-to-DC power harvesting of passive transponders and wireless microsensors is proposed. The method utilizes a step-up autotransformer with a large turn ratio inserted between the antenna and the voltage multiplier to boost the signal prior to rectification while providing a matching impedance to the antenna...
Continuous scaling, necessary for enhanced performance and cost reduction, has pushed existing CMOS materials much closer to their intrinsic reliability limits, forcing reliability engineers to get a better understanding of circuit failure. This requires that designers will have to be very careful with phenomena such as high current densities or voltage overshoots. In addition to the reliability issues,...
Design and characterization of a new generation of single-photon avalanche diodes (SPAD) array, manufactured by ST-Microelectronics in Catania, Italy, are presented. Device performances, investigated in several experimental conditions and here reported, demonstrate their suitability in many applications. SPADs are thin p-n junctions operating above the breakdown condition in Geiger mode at low voltage...
A high intercept points, cost-effective, and power-efficient switching FET double balanced mixer (DBM) is reported. The Switching FET DBM demonstrated in this work offers input intercept points (IIP3) and conversion loss typically 44 dBm and 8.5 dB respectively with 15 dBm LO power for the frequency band (RF: 900-2150 MHz, LO: 850-1950 MHz, IF: 50-200 MHz). The measured interport isolation is typically...
CMOS diodes are evaluated in terms of figure-of-merit (It2/C) and quality factor. Five 5.25-GHz LNAs with ESD protection are designed and tested; all have high ESD protection levels. The LNA protected with a one-diode variant of the cancellation circuit has RF performance almost identical to that of a sixth, unprotected LNA.
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