Abstract
An analytical approach based on linear periodic time- varying theory, is developed to analyze the noise characteristics of current-commutating CMOS mixers. Based on the derived transfer functions with memory efiect of tail capacitance, the frequency- dependent noise transforming factors for individual stages in the mixers are numerically computed to rigorously describe the noise output. A unifled noise expression considering both the thermal noise and the ∞icker noise is proposed. It enables the noise analysis of the mixers particularly for a high LO frequency with difierent IF characteristics, and is verifled by measurements.
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