Class D CMOS power amplifier with on/off logic for a multilevel outphasing transmitter

Mikko Martelius, Kari Stadius, Jerry Lemberg, Tero Nieminen, Enrico Roverato, Marko Kosunen, Jussi Ryynänen, Lauri Anttila, Mikko Valkama

    Tutkimustuotos: KonferenssiartikkeliScientificvertaisarvioitu

    9 Sitaatiot (Scopus)

    Abstrakti

    In this paper, we present a class D power amplifier (PA) design in 28 nm CMOS for a multilevel outphasing transmitter. For increased output power, the design consists of eight unit PAs with cascoded output stages. In order to improve back-off efficiency from conventional outphasing, the PAs are switched on and off in pairs for different amplitude levels, which is challenging to implement with cascoded class D. As a solution, we introduce a new on/off switching method based on logic gates utilizing two square wave voltages to produce either a similar square wave or a constant voltage. This method enables a higher level of integration by using low-voltage digital signals for on/off control, while eliminating the timing mismatch between output transistors caused by a level shifter. The simulated peak output power of the PA is 32.4 dBm, and its peak efficiency is 34.1%.

    AlkuperäiskieliEnglanti
    OtsikkoISCAS 2016 - IEEE International Symposium on Circuits and Systems
    KustantajaIEEE
    Sivut710-713
    Sivumäärä4
    ISBN (elektroninen)9781479953400
    DOI - pysyväislinkit
    TilaJulkaistu - 29 heinäk. 2016
    OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
    TapahtumaIEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS -
    Kesto: 1 tammik. 1900 → …

    Julkaisusarja

    Nimi
    ISSN (elektroninen)2379-447X

    Conference

    ConferenceIEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS
    Ajanjakso1/01/00 → …

    Julkaisufoorumi-taso

    • Jufo-taso 1

    !!ASJC Scopus subject areas

    • Electrical and Electronic Engineering

    Sormenjälki

    Sukella tutkimusaiheisiin 'Class D CMOS power amplifier with on/off logic for a multilevel outphasing transmitter'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.

    Siteeraa tätä