Abstract:This paper presents a sigma delta modulator (ƩΔM) based transmitter that is suitable for digital multi-standard wireless applications especially for software defined radio (SDR) systems. The proposed transmitter mainly consists of a sigma-delta modulator and a switching-mode power amplifier. In the proposed design, a third order low-pass ƩΔM is implemented to produce a high frequency digital-like signals that is used to drive a high efficient class-E switching mode power amplifier. The target technology for fa… Show more
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