Analytical design equations for Class-E power amplifiers with finite DC-Feed inductance and switch on-resistance

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    Abstract

    Many critical design trade-offs of the Class-E poweramplifier (e.g power efficiency) are influenced by the switch onresistanceand the value of dc-feed drain inductance. In literature,the time-domain mathematical analyses of the Class-E poweramplifier with finite dc-feed inductance assume zero switch onresistancein order to alleviate the mathematical difficulties;resulting in non-optimum designs.We present analytical design equations in this paper forClass-E power amplifier taking into account both finite draininductance and switch on-resistance. The analysis indicates theexistence of infinitely many design equations; conclusions include:1) Class-E conditions (e.g. zero voltage and zero slope) can besatisfied in the presence of switch-on resistance.2) The drain-efficiency (η) of the Class-E power amplifier isupper limited for a certain operation frequency and transistortechnology.3) Using a finite dc-feed inductance instead of an RF-choke ina Class-E power amplifier can increase η by ≈ 30%.
    Original languageEnglish
    Title of host publicationThe IEEE International Symposium on Circuits and Systems (ISCAS)-2007.
    Place of PublicationPiscataway
    PublisherIEEE Computer Society Press
    Pages2818-2821
    Number of pages4
    ISBN (Print)1-4244-0921-7
    DOIs
    Publication statusPublished - 27 May 2007
    EventIEEE International Symposium on Circuits and Systems, ISCAS 2007 - New Orleans, United States
    Duration: 27 May 200730 May 2007
    http://www.iscas2007.org/

    Publication series

    Name
    PublisherIEEE

    Conference

    ConferenceIEEE International Symposium on Circuits and Systems, ISCAS 2007
    Abbreviated titleISCAS 2007
    CountryUnited States
    CityNew Orleans
    Period27/05/0730/05/07
    Internet address

    Keywords

    • EWI-9991
    • IR-58152
    • METIS-245717

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  • Cite this

    Acar, M., Annema, A. J., & Nauta, B. (2007). Analytical design equations for Class-E power amplifiers with finite DC-Feed inductance and switch on-resistance. In The IEEE International Symposium on Circuits and Systems (ISCAS)-2007. (pp. 2818-2821). Piscataway: IEEE Computer Society Press. https://doi.org/10.1109/ISCAS.2007.378758