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    Reconfigurable Class S Power Amplifiers at RF and Microwave Frequencies


    Dooley, John and Podsiadlik, Tomasz and Canniff, Alan and Farrell, Ronan (2008) Reconfigurable Class S Power Amplifiers at RF and Microwave Frequencies. In: Workshop On Integrated Nonlinear Microwave And Milimetre-Wave Circuits, 24th November - 25th November 2008, Malaga, Spain.

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    Abstract

    When a delta-sigma modulator (DSM) is placed before a class D switching stage the combination can be used to amplify time varying envelope signals. However a bandpass DSM is commonly employed and is required to have a sampling frequency approximately four times the carrier frequency. At RF or microwave frequencies proprietary hardware was previously needed to implement the DSM. However, it is shown here in simulation and from experimental measurement that a suitable DSM for class S power amplifiers can be implemented at RF and microwave frequencies using mid-range FPGA technology. Index Terms- Class S, efficiency, power amplifiers, sigma-delta modulation

    Item Type: Conference or Workshop Item (Paper)
    Keywords: Class S; efficiency; power amplifiers; sigma-delta modulation;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Item ID: 1398
    Depositing User: Dr. Ronan Farrell
    Date Deposited: 26 May 2009 13:34
    Refereed: Yes
    URI:

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