VCO Design Guide
PLLs, VCOs, and Dividers
A Low-Voltage Low-Power Wide-Tuning-Range Hybrid Class-AB/Class-B VCO With Robust Start-Up and High-Performance ${\rm FOM}_{ T}$
A low-noise, 900-MHz VCO in 0.6-μm CMOS
Monolithic CMOS LC-VCOs