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


Cheng, Wei and Annema, Anne Johan and Croon, Jeroen A. and Nauta, Bram (2011) Noise and Nonlinearity Modeling of Active Mixers for Fast and Accurate Estimation. IEEE transactions on circuits and systems I: regular papers, 58 (2). pp. 276-289. ISSN 1549-8328

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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.

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Copyright:© 2011 IEEE
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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