A CMOS Envelope Tracking Supply Converter for RF Power Amplifiers of 5G NR Mobile Terminals

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Abstract
An 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-um 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.
Funding Information
  • Ministry of Science and Technology, Taiwan (106-2221-E-002-212-MY3, 109-2622-8-002-010-TA, 109-2221-E-002-135 -MY3)
  • Center for Electronics Technology Integration of the Featured Areas Research Center
  • Ministry of Education in Taiwan

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