A General Theory of Phase Noise in Electrical Oscillators
A General Theory of Phase Noise in Electrical Oscillators
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DOI：
10.1109/9780470545492.ch20
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
B. Razavi
中科院分区：
文献类型：
--
作者：
B. Razavi
介绍了一种通用模型，通过承认所有振荡器的真实周期时变特性，该模型能够对不同类型的电振荡器的相位噪声做出准确、定量的预测。这种新的方法还阐明了几个以前未知的设计准则，通过识别本征器件噪声和外部噪声源对总相位噪声的影响机制来降低近距离相位噪声。特别是，它解释了设备中的1/f噪声如何上转换为接近相位噪声的细节，并确定了抑制这种上转换的方法。该理论还自然而然地适应了循环平稳噪声源，从而带来了额外的重要设计见解。作为特例，该模型简化为已有的相位噪声模型。观察到理论、模拟和测量之间有很好的一致性。
A general model is introduced which is capable of making accurate, quantitative predictions about the phase noise of different types of electrical oscillators by acknowledging the true periodically time-varying nature of all oscillators. This new approach also elucidates several previously unknown design criteria for reducing close-in phase noise by identifying the mechanisms by which intrinsic device noise and external noise sources contribute to the total phase noise. In particular, it explains the details of how 1/f noise in a device upconverts into close-in phase noise and identifies methods to suppress this upconversion. The theory also naturally accommodates cyclostationary noise sources, leading to additional important design insights. The model reduces to previously available phase noise models as special cases. Excellent agreement among theory, simulations, and measurements is observed.