8-GHz CMOS quadrature VCO using transformer-based LC tank

FREE-DOWNLOAD D Baek, T Song, E Yoon… – Microwave and Wireless …
Abstract—A fully integrated quadrature VCO at 8 GHz is presented. The VCO is implemented
using a transformer-based LC tank in 0.18 m CMOS technology, in which two VCOs are coupled
to generate IQ signals. The VCO is realized employing the drain-gate transformer .