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A triple-band SiGe HBT differential VCO has been developed for the next generation multi-band and/or multi-mode wireless radios. It utilizes a reconfigurable multi-band resonator which is based on a dual-band resonator but can achieve a triple-band resonation by using a band-selective switch. The band-selective switch is comprised of a two-terminal SiGe HBT with base and collector short-circuited...
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