Conference Publication Details
Mandatory Fields
Ralph, S;Farrell, R
2007 EUROPEAN CONFERENCE ON CIRCUIT THEORY AND DESIGN, VOLS 1-3
Using high pass sigma-delta modulation for class-S power amplifiers
2007
January
Published
1
7 ()
Optional Fields
707
710
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.
Grant Details