Lin Y.-CYI-JAN EMERY CHEN2021-09-022021-09-02202108858993https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097166122&doi=10.1109%2fTPEL.2020.3039786&partnerID=40&md5=58f1450e3f9446b82e537242432ee019https://scholars.lib.ntu.edu.tw/handle/123456789/581240An envelope tracking supply converter was presented for the RF power amplifiers of sub-6 GHz 5G NR mobile devices. The hybrid supply converter consisted of a linear, fast switching, and slow switching regulators connected in parallel. The two-phase hysteretic control was proposed for use in the fast switching regulator to track the fast-varying envelope of 40-MHz 5G NR signal. The 0.25-μm CMOS supply converter achieved a maximum efficiency of 79.1%. The power-added efficiency improvement of the RF power amplifier with the proposed supply converter was 3.1% when tested with a 40-MHz 256-QAM 5G NR signal. ? 1986-2012 IEEE.5G NR; envelope tracking (ET); mobile communication; power amplifier (PA); RF transmitter; supply converter[SDGs]SDG7CMOS integrated circuits; Efficiency; Power amplifiers; Power converters; Switching circuits; Envelope tracking; Fast switching; Hysteretic control; Maximum Efficiency; Mobile terminal; Power-added efficiency; RF power amplifiers; Switching regulator; 5G mobile communication systemsjournal article10.1109/TPEL.2020.30397862-s2.0-85097166122