Gm-C biquad filter for low signal sensor applications

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Citations (Scopus)

Abstract

This paper presents a circuit topology for a Gm-C biquad filter, suitable for low frequency signals with low amplitude. The low cutoff frequencies are obtained reducing the transconductance Gm through a current division technique. Moreover, all the active devices are operating in weak inversion mode lowering the requirements for the level of the voltage power supply. A second and fourth order filter configuration, based on a Tow-Thomas biquad, is designed and simulated. The filter operates in weak inversion with a supply of 0.9V, achieves a cutoff frequency of 52Hz, and power consumption around 2.8μW. The integrated noise is 24.4μVrms, the dynamic range is 43dB, and the filter shows -40dB THD for 5mV input peak amplitude.

Original languageEnglish
Title of host publicationProceedings of the 23rd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2016
EditorsAndrzej Napieralski
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages207-210
Number of pages4
ISBN (Electronic)9788363578084
DOIs
Publication statusPublished - 2 Aug 2016
Event23rd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2016 - Lodz, Poland
Duration: 23 Jun 201625 Jun 2016

Conference

Conference23rd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2016
CountryPoland
CityLodz
Period23/06/1625/06/16

Keywords

  • biquad
  • gm-C filter
  • low cutoff frequency
  • weak inversion

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  • Cite this

    Arya, R., & Oliveira, J. P. A. D. (2016). Gm-C biquad filter for low signal sensor applications. In A. Napieralski (Ed.), Proceedings of the 23rd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2016 (pp. 207-210). [7529733] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MIXDES.2016.7529733