Abstract
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 language | Undefined |
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Pages (from-to) | 276-289 |
Number of pages | 14 |
Journal | IEEE transactions on circuits and systems I: regular papers |
Volume | 58 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Feb 2011 |
Keywords
- intermodulation
- dc offset
- mismatch
- EWI-19776
- METIS-279139
- flicker noise
- Active mixer
- IIP2
- IIP3
- Nonlinearity
- IR-76354