Gm-C biquad filter for low signal sensor applications

Richa Arya; João Pedro Abreu de Oliveira

doi:10.1109/MIXDES.2016.7529733

Gm-C biquad filter for low signal sensor applications

Richa Arya, João Pedro Abreu de Oliveira

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

20 Citations (Scopus)

Abstract

This paper presents a circuit topology for a G_m-C biquad filter, suitable for low frequency signals with low amplitude. The low cutoff frequencies are obtained reducing the transconductance G_m 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 24.4μV_rms, the dynamic range is 43dB, and the filter shows -40dB THD for 5mV input peak amplitude.

Original language	English
Title of host publication	Proceedings of the 23rd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2016
Editors	Andrzej Napieralski
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	207-210
Number of pages	4
ISBN (Electronic)	9788363578084
DOIs	https://doi.org/10.1109/MIXDES.2016.7529733
Publication status	Published - 2 Aug 2016
Event	23rd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2016 - Lodz, Poland Duration: 23 Jun 2016 → 25 Jun 2016

Conference

Conference	23rd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2016
Country/Territory	Poland
City	Lodz
Period	23/06/16 → 25/06/16

Keywords

biquad
gm-C filter
low cutoff frequency
weak inversion

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10.1109/MIXDES.2016.7529733

Cite this

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title = "Gm-C biquad filter for low signal sensor applications",

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.",

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author = "Richa Arya and Oliveira, {Jo{\~a}o Pedro Abreu de}",

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Arya, R & Oliveira, JPAD 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., 7529733, Institute of Electrical and Electronics Engineers (IEEE), pp. 207-210, 23rd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2016, Lodz, Poland, 23/06/16. https://doi.org/10.1109/MIXDES.2016.7529733

Gm-C biquad filter for low signal sensor applications. / Arya, Richa; Oliveira, João Pedro Abreu de.
Proceedings of the 23rd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2016. ed. / Andrzej Napieralski. Institute of Electrical and Electronics Engineers (IEEE), 2016. p. 207-210 7529733.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - 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.

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Gm-C biquad filter for low signal sensor applications

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Keywords

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