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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;
Subjects: Science & 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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