Performance comparison of high-order IFLF and LF linear phase lowpass OTA-C filters with and without gain boost

M. Hasan, Y. Sun

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Design and performance comparison of high-order operational transconductance amplifier and capacitor (OTA-C) filters using leapfrog (LF) and inverse-follow-the-leader-feedback (IFLF) structures are investigated. The filters are designed for a 125 MHz seventh-order equiripple group delay lowpass characteristic with and without gain boost and simulated in 0.25 μm 2-V CMOS. A fully differential highly linear OTA with cross-coupled input pairs and regulated cascode output is used for the simulation. Simulated results show that while the IFLF OTA-C filter can achieve a higher gain boost, the LF OTA-C filter has better other performances.
Original languageEnglish
Pages (from-to)451-463
JournalAnalog Integrated Circuits and Signal Processing
Volume63
Issue number3
DOIs
Publication statusPublished - 2010

Keywords

  • active filters
  • continuous-time filters
  • OTA-C filters
  • multiple loop feedback filters
  • linear phase filters

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