Complete noise analysis for CMOS switching mixers via stochastic differential equations

D. Ham, A. Hajimiri
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引用次数: 42

Abstract

A complete analysis of noise in CMOS switching mixers using stochastic differential equations (SDE) is presented. The noise figure is calculated using this analysis which takes both cyclostationary noise sources and capacitive high frequency effects into account. The analysis leads to important design implications for mixer design and shows that some commonly-used approximations for mixer noise calculations can be misleading in certain cases even at low frequencies. It is demonstrated that there is an optimum value for the load capacitor leading to minimum noise figure and maximum conversion gain for the mixer.
通过随机微分方程完成CMOS开关混频器的噪声分析
利用随机微分方程(SDE)对CMOS开关混频器中的噪声进行了完整的分析。利用这种分析方法计算噪声系数,同时考虑了循环平稳噪声源和电容高频效应。该分析为混频器设计提供了重要的设计启示,并表明在某些情况下,即使在低频情况下,一些常用的混频器噪声计算近似值也会产生误导。结果表明,负载电容存在一个最优值,可使混频器的噪声系数最小,转换增益最大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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