中文摘要：

从描述振荡器的非线性微分方程出发，提出将噪声作为非线性微分方程的一项，通过建立随机非线性微分方程来分析振荡器的相位噪声．并用这种方法，在相同强度下，针对分别为白噪声和混沌噪声的情形，分析了VanderPol振荡器产生的相位噪声，发现混沌噪声产生的相位噪声要远大于白噪声所产生的相位噪声．通过分析其原因，提出了一些低相位噪声振荡器设计所应考虑的问题．

英文摘要：

A new analysis approach for phase noise is proposed based on nonlinear stochastic differential equation. Using this method to get numerical solution of Van der Pol oscillator＇s phase noise produced by chaos noise and that of by white noise, by carefully compared these phase noises, which indicates that phase noise produced by chaos noise larger than that of by white noise under the same intensity condi- tions. By analyzing the cause of this result, some advices for guiding minimized phase noise in an oscilla- tor design is proposed.