Periodic Time-Varying Noise in Current-Commutating Cmos Mixers

doi:10.2528/PIER11040706

PIER
Progress In Electromagnetics Research	ISSN: 1070-4698, E-ISSN: 1559-8985

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PERIODIC TIME-VARYING NOISE IN CURRENT-COMMUTATING CMOS MIXERS

By B. Guo and G. Wen

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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 effect 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 unified noise expression considering both the thermal noise and the flicker noise is proposed. It enables the noise analysis of the mixers particularly for a high LO frequency with different IF characteristics, and is verified by measurements.

Citation:
B. Guo and G. Wen, "Periodic time-varying noise in current-commutating cmos mixers," Progress In Electromagnetics Research, Vol. 117, 283-298, 2011.
doi:10.2528/PIER11040706
http://www.jpier.org/pier/pier.php?paper=11040706

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