A novel ring-based triple-push 0.2-to-34 GHz VCO in 0.13μm CMOS technology

A novel ring-based triple-push voltage-controlled oscillator (VCO) with a continuous range from 0.2 to 34 GHz is proposed and realized using a commercial 0.13-μm 1P8M CMOS process. The output power of the VCO is −18 dBm with only ±2 dB variation in the full band. The fundamental rejection is more than 15 dB, and the second harmonic rejection is more than 25 dB. This VCO achieves the widest continuous tuning range reported to date.