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- W2149206063 abstract "A load-shared CMOS power amplifier (PA) for 1.8-GHz polar transmitter applications has been implemented in standard 0.18-mum CMOS technology and fully characterized to demonstrate its efficiency boosting technique in low power mode. With the aid of cascode amplifiers, the load-shared configuration achieves efficiency improvement at low supply voltage in a polar transmitter. A differential class-E amplifier with a parallel resonant circuit is analyzed and incorporated in the load-shared PA. The load-shared configuration is composed of driver amplifiers (DAs) and PAs whose output loads are shared. The DA has a constant gate voltage biasing of a cascode amplifier for efficiency boosting, whereas the PA has a self-biased cascode configuration to be turned on and off by a supply voltage. The measurement results of the load-shared configuration show a drain efficiency increase from 6% to 30% at 16-dBm output power compared with a conventional self-biased cascode amplifier. The load-shared PA is reported with 35.6% of power-added efficiency and 32.2 dBm of output power at 1.88 GHz." @default.
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- W2149206063 date "2008-07-01" @default.
- W2149206063 modified "2023-10-02" @default.
- W2149206063 title "A Load-Shared CMOS Power Amplifier With Efficiency Boosting at Low Power Mode for Polar Transmitters" @default.
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- W2149206063 doi "https://doi.org/10.1109/tmtt.2008.925220" @default.
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