Variable gain active predistorter with linearity enhancement for a 2.4 GHz SiGe HBT power amplifier design

Kuei Cheng Lin, Hwann Kaeo Chiou, Po Chang Wu, Chu Jung Sha, Chun Lin Ko, Da Chiang Chang, Ying Zong Juang

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

3 Scopus citations

Abstract

This paper proposes a 2.4 GHz SiGe HBT differential power amplifier (PA) with a novel on-chip variable gain active predistorter (PD) for linearity enhancement. The fully differential active PD provides an open collector adaptive bias control which can effectively enhance the linearity while improve power added efficiency (PAE). The PA with active PD achieves an output 1-dB compression (OP1dB) of 20 dBm, a gain control range of 10 dB, a PAE of 30%, and an error vector magnitude (EVM) improvement of 2.4 % under OFDM/64-QAM modulation signal. The fabricated die size including pads is less than 0.74 mm 2 and suitable for highly integrated linear PA.

Original languageEnglish
Title of host publication2012 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2012 - Proceedings of Technical Papers
DOIs
StatePublished - 2012
Event2012 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2012 - Hsinchu, Taiwan
Duration: 23 Apr 201225 Apr 2012

Publication series

Name2012 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2012 - Proceedings of Technical Papers

Conference

Conference2012 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2012
Country/TerritoryTaiwan
CityHsinchu
Period23/04/1225/04/12

Keywords

  • Active predistorter
  • error vector magnitude (EVM)
  • power added efficiency (PAE)
  • power amplifier (PA)
  • SiGe HBT

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