Out-of-Band Immunity to Interference of Single-Ended Baseband Amplifiers Through IM 2 Cancellation

Emil Totev, Cong Huang, Leonardus de Vreede, John Long, Wouter Serdijn, Chris Verhoeven

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The effect of second-order intermodulation (IM2) distortion produced by out-of-band, high-frequency interference on baseband/IF amplifiers is analyzed using the Volterra series. It is shown that a compensation loop designed to trap nonlinear currents improves the immunity of differential stages to IM2 distortion generated by local feedback. Measurements of a single-ended amplifier example implementing the proposed method demonstrate an IP2 increase of more than 30 dB
Original languageEnglish
Pages (from-to)1785-1793
Number of pages9
JournalIEEE Transactions on Circuits and Systems Part 1: Regular Papers
Volume63
Issue number11
DOIs
Publication statusPublished - 2016

Keywords

  • RFI
  • Amplifiers
  • EMI
  • IM2 cancellation
  • nonlinear distortion

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