A 0.082mm2 24.5-to-28.3GHz Multi-LC-Tank Fully-Differential VCO Using Two Separate Single-Turn Inductors and a 1D-Tuning Capacitor Achieving 189.4dBc/Hz FOM and 200±50kHz 1/f3 PN Corner

摘要

This paper reports a capacitive-coupling multi-LC-tank fully-differential VCO with wideband 1/f³ phase noise (PN) corner reduction. It features two separate single-turn inductors and a differential-mode 1D-tuning capacitor bank to realize high-quality-factor high-impedance resonances at the 1x-to-2x of the oscillation frequency. Prototyped in 65nm CMOS technology, the VCO occupies 0.082mm² and measures a tuning range (TR) of 24.5 to 28.3GHz. The FOM is 189.4dBc/Hz and the TR-insensitive 1/f³ PN corner is 200±50kHz.