Ralph, Stephen and Farrell, Ronan
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.
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.
Conference or Workshop Item
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||Power amplifiers; Sigma-delta modulation; Class-s power amplifiers; High pass sigma-delta modulation; Switching frequency; Switching power amplifiers.
||Faculty of Science and Engineering > Electronic Engineering
Dr. Ronan Farrell
||25 May 2009 16:48
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