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首页> 外文期刊>IEEE microwave magazine >How Low Can They Go?: Oscillator Phase Noise Model, Theoretical, Experimental Validation, and Phase Noise Measurements
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How Low Can They Go?: Oscillator Phase Noise Model, Theoretical, Experimental Validation, and Phase Noise Measurements

机译：它们能走多低？：振荡器相位噪声模型，理论，实验验证和相位噪声测量

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Noise is associated with all the components of the oscillator circuit; however, the major contribution of the noise in an oscillator is from the active device, which introduces amplitude modulation (AM) and phase modulation (PM) noise [1]-[103]. The conventional wisdom is to ignore AM component of the noise because the gain limiting effects of the active device operating under saturation, allowing only little variation in the output amplitude due to the noise in comparison to PM noise component, which directly affects the frequency stability of the oscillator and creates noise sidebands. But in reality, many oscillator topologies create significant AM noise, therefore effective noise contribution is the combination of 1/f spectrum with the 1/f 2 effect in all PM, makes the low_frequency noise much greater, and that's where the information in most modulated signals resides [1]-[3].
机译：噪声与振荡器电路的所有组件有关。然而，振荡器中噪声的主要贡献来自有源器件，有源器件引入了幅度调制（AM）和相位调制（PM）噪声[1]-[103]。传统的观点是忽略噪声的AM分量，因为有源器件在饱和下工作的增益限制效应，与PM噪声分量相比，由于噪声而导致的输出幅度变化很小，这直接影响了PM的频率稳定性。振荡器并产生噪声边带。但实际上，许多振荡器拓扑会产生大量的AM噪声，因此有效的噪声贡献是所有PM中1 / f频谱与1 / f 2效应的结合，使低频噪声更大，而这正是调制频率最高的信息所在。信号驻留在[1]-[3]中。

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