A 3.7-to-10 GHz Low Phase Noise Wideband LC-VCO Array in 55-nm CMOS Technology

This paper presents a four-core LC-VCO array in 55 nm CMOS technology. Based on the multi-core VCO technology and switched capacitor technology, tuning range is expanded, phase noise optimization wide achieved based second harmonic filtering Q value degeneration as well of switching transistors. The proposed array, occupying chip area 1.65 × 1.44 mm2, realizes measured oscillation frequency about 3.7−10 GHz with −127.5~−116.08 dBc/Hz at 1 MHz offset, achieves an output power 2.69 dBm from total consumption 52.8 mW.