Determination of the Phase Noise Sources of CMOS-Integrated LC Oscillators

The classical Floquet perturbation theory can not provide a deeper observation on the phase noise of oscillation excited by the complicated noise source, and are limited to a particular circuit and the assumption of stationary noise sources. In this paper, the key steps for the novel technique based on the stochastic differential equations are studied to capture the noise-energy contribution of the interesting nodes in the circuits to the overall PSD. The numerical results illustrate the practicability of the presented method as expected by showing the quantitative analysis and comparison of contributors of phase noise between the standard LC oscillator and that in SOC.