A 4.6–5.9 GHz fully integrated 0.25-µm CMOS complementary LC VCO with buffer

Abstract

A new fully integrated 0.25-μm CMOS complementary LC VCO with buffer with low phase noise, wide tuning range, and high frequency of merit is reported. The developed VCO achieves a 25% tuning range across 4.6-5.9 GHz, phase noise of -117 dBc/Hz at 1-MHz offset, and frequency of merit of 183.7. The integrated VCO has a die size of 320μm×300μm.