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Using High Pass Sigma-Delta Modulation for Class-S Power Amplifiers

Ralph, Stephen and Farrell, Ronan (2007) Using High Pass Sigma-Delta Modulation for Class-S Power Amplifiers. In: Proceedings of 2007 European Conference on Circuit Theory and Design, 26th - 30th August 2007, Sevilla, Spain.

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Abstract

Switching power amplifiers offer the potential for superior efficiencies if used at radio frequencies. However many existing bandpass architectures require a switching frequency four times that of the signal, making implementation difficult. In this paper we propose to use a high-pass sigma-delta modulator to reduce the switching rate to only twice of the signal. We will present a solution to the problem of the reflected image and demonstrate it’s viability for use in mobile telephony.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Copyright Notice "©2007 IEEE. Reprinted from Proceedings of 2007 European Conference on Circuit Theory and Design Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE." http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4529694&isnumber=4529518
Keywords: Power amplifiers; Sigma-delta modulation; Class-s power amplifiers; High pass sigma-delta modulation; Switching frequency; Switching power amplifiers.
Subjects: Science & Engineering > Electronic Engineering
Item ID: 1342
Depositing User: Dr. Ronan Farrell
Date Deposited: 25 May 2009 16:48
Refereed: Yes
URI:

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