Kyunghoon Moon, Jooseung Kim, Sangsu Jin, Byungjoon Park, Yunsung Cho, Min Park, Bumman Kim
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Highly linear envelope tracking power amplifier with simple correction circuit
In this paper, we propose an envelope tracking (ET) power amplifier (PA) with a simple correction circuit (SCC) for linear operation. The supply dependent AM-AM and AM-PM distortion of an ET PA is linearized by the SCC which is fabricated on chip. The PA and supply modulator are fabricated using I/O device of CMOS 40nm process. For the 9.35-dB peak-to-average-power ratio, 256-QAM IEEE 802.11ah signal, the ET PA delivers a power-added efficiency of 24%, an average output power of 19.4 dBm and an error vector magnitude of -30 dB.
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