A novel SiGe BiCMOS variable-gain active predistorter using current steering topologies

Jeng Han Tsai, Tian Wei Huang

Research output: Contribution to conferencePaper

5 Citations (Scopus)

Abstract

This paper presents a novel design of 2.4-GHz variable-gain active predistorter (PD) using a 0.35-μm SiGe BiCMOS technology. The current steering topologies are selected for this design to provide dual functions of (1) an active predistorter for power amplifier linearization, and (2) a variable gain amplifier (VGA) for transmitter power control. Unlike other traditional "passive" predistorters, this active predistorter does not need an additional buffer amplifier to compensate the loss. Furthermore, through the bias voltage control at low current region, the amount of gain expansion from this predistorter becomes programmable to compensate the PA non-linearity. Finally, this variable-gain predistorter could be used as a VGA in a multi-stage power amplifier design and it is well suitable for the RF-SOC applications. The PA experimental results of 16-QAM modulated signals show that the compressed constellation can be uniformly spread out into a "square", the spectral re-growth is suppressed by 7-9 dB, and the EVM can be reduced from 9.9 % to 5.7 %.

Original languageEnglish
Pages559-562
Number of pages4
Publication statusPublished - 2004 Sep 20
EventDigest of Papers - 2004 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium - Fort Worth, TX, United States
Duration: 2004 Jun 62004 Jun 8

Other

OtherDigest of Papers - 2004 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium
CountryUnited States
CityFort Worth, TX
Period04/6/604/6/8

Keywords

  • Linearization
  • Nonlinear
  • Power amplifier (PA)
  • Predistorter
  • Radio frequency integrated circuit (RFIC)

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Tsai, J. H., & Huang, T. W. (2004). A novel SiGe BiCMOS variable-gain active predistorter using current steering topologies. 559-562. Paper presented at Digest of Papers - 2004 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium, Fort Worth, TX, United States.