A Fully Decoupled LC Tank VCO Topology for Amplitude Boosted Low Phase Noise Operation.

This paper describes a general technique for reducing oscillator phase noise in LC voltage-controlled oscillators (VCOs). Phase noise is reduced using a circuit topology that decouples the LC tank from the active devices using capacitive transformers, thereby achieving a higher amplitude of oscillation not limited by the transistor breakdown voltage. Moreover, the proposed VCO topology reduces act...