A 1.2mW 0.02mm2 2GHz Current-Controlled PLL Based on a Self-Biased Voltage-to-Current Converter

A 0.5-to-2GHz frequency synthesizer PLL implemented in a 90nm CMOS technology uses a 1.0V supply and dissipates 0.6 and 1.2mW while operating at 1 and 2GHz, respectively. The PLL occupies an active die area of 0.02mm². The current-controlled method based on a self-biased voltage-to-current converter enables the use of a small size loop filter and makes the PLL bandwidth insensitive to PVT variations and multiplication factor.