High performance analog VLSI computational circuits

Seyed R. Zarabadi*, Mohammed Ismail, Chung-Chih Hung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Simple linear voltage/current-controlled voltage-to-current (V-I) converters, which are to first-order insensitive to the threshold voltage variation, are introduced. The circuits can be used as basic building blocks to construct simple analog computational circuits, which can perform functions such as squarerooting, squaring, multiplication, sum of squares, difference of squares, etc. Some of the key features are: good linearity, floating inputs [high common-mode rejection ratio (CMRR)], simplicity, and good transconductance tuning range. The circuits can be realized with CMOS devices in saturation, however, BiCMOS devices extend their speed and input voltage range. Realistic simulations and experimental results clearly demonstrate the claims.

Original languageEnglish
Pages (from-to)644-649
Number of pages6
JournalIEEE Journal of Solid-State Circuits
Volume33
Issue number4
DOIs
StatePublished - 1 Apr 1998

Keywords

  • Analog biCMOS
  • Analog CMOS
  • Analog computational circuits
  • Analog multipliers
  • Analog signal processing
  • Communication circuits
  • Mixers

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