A 0 . 6 V , 4 . 32 mW , 68 GHz Low Phase - Noise VCO With Intrinsic - Tuned Technique in 0 . 13 m CMOS

An intrinsic-tuned, 68 GHz voltage controlled oscillator (VCO) without an extra on-chip accumulation-mode metal oxide semiconductor (MOS)-varactor is demonstrated in a standard, 0.13 m CMOS technology. This VCO exhibits phase noises of 98.4 dBc/Hz and 115.2 dBc/Hz at 1 and 10 MHz offset, respectively, along with a tuning range of 4.5% even under a small power consumption of 4.32 mW. Besides, the highest figure-of-merit (taking frequency tuning range into account) of 182 dBc/Hz under the 1 MHz offset condition is achieved among all previously reported 60 GHz CMOS-based VCOs, which is attributed to the proposed intrinsic tuning mechanism.