Fractional Harmonic Distortion Calculation Using Simplified “Reconciliation” Model for a Most Operating in Moderate Inversion IEEE-MWCAS-2017-USA

Igor Filanovsky, Luis Oliveira, Nikolay Tchamov

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    2 Citations (Scopus)

    Abstract

    The paper describes evaluation of the first, second and (with most attention to) third harmonics of the drain current in a MOS transistor operating in moderate inversion. The dependence of this current on the gate-source voltage is approximated using a simplified “reconciliation” model developed by Y. Tsividis. Then, the drain current components depending exponentially on normalized signal voltage are calculated using modified Bessel functions. This approach indicates that the third harmonic has two “sweet spots” (zero values) but the location of that one corresponding to moderate inversion changes with the signal amplitude. This change makes impossible application of this point for circuit linearization. The second “sweet spot” is corresponding practically to the strong inversion, and may be used for this purpose. The results of proposed calculation method are compared with that using the traditional approach, for example, Taylor series expansion of the drain current expression for small signal. The traditional method misses the above described, for moderate inversion, detrimental effect of signal amplitude or even loses completely the presence of these spots.
    Original languageEnglish
    Title of host publicationIEEE International Midwest Symposium on Circuits and Systems, MWCAS-2017, Boston, USA, August 6th-9th, 2017
    PublisherIEEE
    ISBN (Electronic)978-1-5090-6389-5
    DOIs
    Publication statusPublished - 6 Aug 2017
    Publication typeA4 Article in conference proceedings
    EventInternational Midwest Symposium on Circuits and Systems - , United States
    Duration: 1 Jan 2000 → …

    Conference

    ConferenceInternational Midwest Symposium on Circuits and Systems
    Country/TerritoryUnited States
    Period1/01/00 → …

    Publication forum classification

    • Publication forum level 1

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