A 2.3-mW 26.3-GHz Gm-Boosted Differential Colpitts VCO With 20% Tuning Range in 65-nm CMOS

This paper presents an architecture for differential Colpitts voltage-controlled oscillators (VCOs) in complementary metal-oxide-semiconductor (CMOS) that utilizes three design techniques to extend the tuning range (TR) of the VCO, while maintaining a low phase noise (PN) and a low power consumption. First, a switched-capacitor bank based on a variable capacitive feedback technique is introduced t...