Abstract
In this paper, a new architecture of an all-digital RF transmitter is proposed. It makes use of delta-sigma modulators for signal synthesizing followed by a dual-input Doherty power amplifier with an efficient design approach. Delta-sigma modulator produces two out-of-phase signals, each of these signals is fed separately into the main and auxiliary power amplifiers of the dual-input Doherty power amplifier, and thereby, the transmitter overcomes the linearity issues. It demonstrates quiet comparable performances: more than 75% of power-added efficiency at a maximum output power of 48.3 dBm, with an overall efficiency greater than 80% for a frequency range from 0.9 to 1.1 GHz.
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Acknowledgements
The authors would like to acknowledge Dr. J. Manjula, Dr. J. Selvakumar, N. Saraswathi, and all the faculties of SRM University, Kattankulathur, Tamil Nadu, India, for their technical support during this work.
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Pradeep, D., Ananda Venkatesan, B. (2018). All-Digital RF Transmitter with Highly Power-Efficient Doherty Power Amplifier. In: Li, J., Sankar, A., Beulet, P. (eds) VLSI Design: Circuits, Systems and Applications . Lecture Notes in Electrical Engineering, vol 469. Springer, Singapore. https://doi.org/10.1007/978-981-10-7251-2_3
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DOI: https://doi.org/10.1007/978-981-10-7251-2_3
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