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- W2000519181 abstract "This paper presents a novel transmitter (Tx) architecture combining voltage-mode class-D power amplifiers (PAs) with an efficient 1-bit envelope delta-sigma modulation scheme for the 800 MHz band. By digitally processing the input 1-bit codes, the proposed Tx operates as a digital Doherty Tx. The proposed Tx architecture is realized with a GaN H-bridge class-D PA module and CMOS modulator ICs and delivers a CW power of 35.9 dBm at 860 MHz with a final-stage drain efficiency of 75.6% at the saturation point. The drain efficiency at 6-dB BO is still 73.4% which corresponds to an improvement of 23.9 points compared to balanced operation. Using a CDMA signal of 1-MHz bandwidth and 6.5-dB peak-to-average power ratio, the digital Doherty Tx achieves an average output power of 28.6 dBm with a drain efficiency of 56.5%." @default.
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- W2000519181 date "2014-06-01" @default.
- W2000519181 modified "2023-09-25" @default.
- W2000519181 title "Digital doherty transmitter with envelope ΔΣ modulated class-D GaN power amplifier for 800 MHz band" @default.
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- W2000519181 doi "https://doi.org/10.1109/mwsym.2014.6848280" @default.
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