On Gm-boosting and cyclostationary noise mechanisms in low-voltage CMOS differential Colpitts VCOs

Koukab, AdilTalebi Amiri, Omid2012-05-152012-05-152012-05-15201210.1109/SiRF.2012.6160136https://infoscience.epfl.ch/handle/20.500.14299/80451WOS:000307348600017This paper presents a theoretical study of CMOS differential Colpitts VCOs. The objective is to provide a deep understanding of the different mechanisms that impact the performances of these VCOs, namely the Gm-boosting and cyclostationary noise. The developed methodology and expressions can be used to analyze, optimize and build new VCO topologies. A novel topology with an optimized gate to source (GS) feedback is proposed. It exhibits a figure of merit (FOM) better than -190 dBc/Hz/mW for all the frequency offsets.Phase noiseSwitching circuitsTopologyTransconductanceTransistorsVoltage-controlled oscillatorsOn Gm-boosting and cyclostationary noise mechanisms in low-voltage CMOS differential Colpitts VCOstext::conference output::conference proceedings::conference paper