A circuit-level analysis of third order intermodulation mechanisms in CMOS mixers using time-invariant power and Volterra series

P. Sakian, R. Mahmoudi, A.H.M. Roermund, van

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Abstract

An in-depth analysis is performed on the third-order intermodulation distortions (IMD3) in the switching pair of active CMOS mixers. The nonlinear time-varying switching pair is described by a hypothetical circuit composed of a nonlinear time-invariant circuit cascaded with a linear time-varying circuit. This allows us to apply power and Volterra series for nonlinearity analysis. The analysis reveals that the impedance in the common-source node of the switching pair along with the fractions of the LO period in which both transistors are simultaneously ON are responsible for IMD3 generation. Besides it is noted that the IMD3 is composed of several terms which may in some cases cancel out each other. The analysis is validated with simulations.
Original languageEnglish
Title of host publicationProceedings of the 2011 41st European Microwave Conference (EuMC), 10-13 October 2011, Manchester, United Kingdom
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages595-598
ISBN (Print)978-1-61284-235-6
Publication statusPublished - 2011
Event41st European Microwave Conference (EuMC 2011) - Manchester, United Kingdom
Duration: 10 Oct 201113 Oct 2011
Conference number: 41

Conference

Conference41st European Microwave Conference (EuMC 2011)
Abbreviated titleEuMC 2011
CountryUnited Kingdom
CityManchester
Period10/10/1113/10/11

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