An 80 GHz Wide Tuning Range Push-Push VCO With gm-Boosted Full-Wave Rectification Technique in 90 nm CMOS

In this letter, an 80 GHz push-push VCO with a g(m)-boosted full-wave rectification pair for W-band (75 to 110 GHz) applications is presented. Incorporating a g(m)-boosted push-push pair as a full-wave rectifier not only increases second-harmonic swing but also operates at low power consumption. Besides, the distributed LC-tank structure helps to further split the parasitic capacitances of buffers and then the push-push pair can extend the frequency tuning range effectively. The push-push VCO is implemented in 90 nm CMOS technology, and it achieves a tuning range of 3.4% and phase noise of -104.2 dBc/Hz at 10 MHz offset. The core area is 0.3 x 0.21 mm(2), and the power consumption is 2.66 mW from a 1.4 V supply voltage excluding buffers.