A 30-dBm class-D power amplifier with on/off logic for an integrated tri-phasing transmitter in 28-nm CMOS

Mikko Martelius*, Kari Stadius, Jerry Lemberg, Enrico Roverato, Tero Nieminen, Yury Antonov, Lauri Anttila, Mikko Valkama, Marko Kosunen, Jussi Ryynanen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

4 Citations (Scopus)
178 Downloads (Pure)

Abstract

This paper presents an eight-unit class-D power amplifier (PA), implemented in 28-nm CMOS. The PA is designed to utilize tri-phasing modulation, which combines coarse-amplitude polar modulation with fine-resolution outphasing components. This new technique enables achieving the back-off efficiency of multilevel outphasing without linearity-degrading discontinuities in the output waveform. Each PA unit contains a cascoded output stage with a 3.6-V supply voltage, and on/off logic enabling multilevel operation controlled by low-voltage signals. The PA achieves a peak output power of 29.7 dBm with a 34.7% efficiency, and is verified to operate with aggregated LTE signals at bandwidths up to 60 MHz at 1.7-GHz carrier frequency.

Original languageEnglish
Title of host publicationProceedings of the 2018 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2018
PublisherIEEE
Pages136-139
Number of pages4
Volume2018-June
ISBN (Print)9781538645451
DOIs
Publication statusPublished - 7 Aug 2018
MoE publication typeA4 Article in a conference publication
EventIEEE Radio Frequency Integrated Circuits Symposium - Philadelphia, United States
Duration: 10 Jun 201812 Jun 2018

Publication series

NameIEEE Radio Frequency Integrated Circuits Symposium
ISSN (Electronic)2375-0995

Conference

ConferenceIEEE Radio Frequency Integrated Circuits Symposium
Abbreviated titleRFIC
CountryUnited States
CityPhiladelphia
Period10/06/201812/06/2018

Keywords

  • CMOS integrated circuits
  • outphasing
  • power amplifiers
  • radio transmitters
  • tri-phasing

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