The manuscript discusses the design of an integrated DC-DC power converter in a digital 0.18 lm CMOS technology for fuel cells and portable applications. By means of a combined boost and switched-capacitor architecture and design optimization a suitable efficiency has been achieved without resorting to special process options and with a limited number of passive external components. The achieved results enable the implementation of a power-converter system for fuel-cell featuring low-cost and small size, as required by the market of portable devices.
An integrated 13-GHz VCO for a single-chip radiometer is presented. The VCO exhibits a large tuning range which thus allows to compensate for the tolerance affecting the free-running frequency without resorting to trimming or mixed analog-digital architecture. The VCO provides a direct 13GHz and, thus, avoids frequency doubling.
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