Noise and Nonlinearity Modeling of Active Mixers for Fast and Accurate Estimation

W. Cheng, Anne J. Annema, Jeroen A. Croon, Bram Nauta

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    Abstract This paper presents a model of active mixers for a fast and accurate estimation of noise and nonlinearity. Based on closed-form expressions, this model estimates the noise figure, IIP3, and IIP2 of the time-varying mixer by a limited number of time-invariant circuit calculations. The model shows that the decreasing transistor output resistance, together with the low supply voltage in deep-submicrometer technologies, significantly contributes to the flicker-noise leakage. Design insights for low flicker noise are then presented. The model also shows that the slope of the LO signal has a significant effect on IIP2, while it has a little effect on IIP3. A new IP2 calibration technique using slope tuning is presented.
    Original languageUndefined
    Pages (from-to)276-289
    Number of pages14
    JournalIEEE transactions on circuits and systems I: regular papers
    Issue number2
    Publication statusPublished - 1 Feb 2011


    • intermodulation
    • dc offset
    • mismatch
    • EWI-19776
    • METIS-279139
    • flicker noise
    • Active mixer
    • IIP2
    • IIP3
    • Nonlinearity
    • IR-76354

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