A 28-GHz, -187.4-dBc/Hz-FOM_T Low-Phase-Noise CMOS VCO Using an Amplitude-Redistribution Technique

摘要

An amplitude-redistribution technique - which improves phase-noise performance of millimeter (mm)-wave and quasi mm-wave cross-coupled VCOs by controlling the distribution of voltage swings on the oscillator nodes - is proposed. A 28-GHz VCO, fabricated in 0.13-μm CMOS technology, uses this technique and demonstrates low phase-noise performance of -112.9-dBc/Hz at 1-MHz offset and F0MT of -187.4-dBc/Hz, which is the highest FOM_T so far reported in regard to CMOS VCOs operating above 25 GHz.