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Sub- μW Tow-Thomas Based Biquad Filter with Improved Gain for Biomedical Applications

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dc.contributor.authorPóvoa, R.
dc.contributor.authorArya, R.
dc.contributor.authorCanelas, A.
dc.contributor.authorPassos, F.
dc.contributor.authorMartins, R.
dc.contributor.authorLourenço, N.
dc.contributor.authorHorta, N.
dc.date.accessioned2025-04-23T13:29:54Z
dc.date.available2025-04-23T13:29:54Z
dc.date.issued2020-01
dc.description.abstractThis paper presents an innovative topology of a gm-C Operational Transconductance Amplifier (OTA), with improved gain and energy-efficiency and its corresponding implementation inside a second order Tow-Thomas based filter configuration, for biomedical and healthcare applications. The proposed OTA architecture takes advantage of a current division technique, as well as the usage of a pair of cross-coupled voltage-combiners in replacement of the static current source that traditionally bias the differential pair. The circuitry proposed in this paper is described at analytical level, fully-designed at sizing level and validated at simulation level compounded by Monte Carlo results, using a standard 130 ​nm technology node. Both the OTA and the biquad filter architecture are compared, in terms of performance indexes, with state-of-the-art bibliography, where the potential of both is demonstrated. The designed filter operates at weak inversion and sub-threshold, being supplied by a 0.9 ​V source, achieving a cut-off frequency of 15 ​Hz, a gain of 7 ​dB, hence improving the input-referred noise and consuming nearly 0.55 ​μW.eng
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPóvoa, R., Arya, R., Canelas, A., Passos, F., Martins, R., Lourenço, N., & Horta, N. (2020). Sub-μW Tow-Thomas based biquad filter with improved gain for biomedical applications. Microelectronics Journal, 95, 104675.
dc.identifier.doi10.1016/j.mejo.2019.104675
dc.identifier.urihttp://hdl.handle.net/10400.26/57723
dc.language.isoengpt_PT
dc.peerreviewedyes
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectgm-C
dc.subjectOTA
dc.subjectBiquad
dc.subjectTow-Thomas
dc.subjectBiomedical
dc.subjectEnergy-efficiency
dc.titleSub- μW Tow-Thomas Based Biquad Filter with Improved Gain for Biomedical Applicationspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleMicroelectronics Journalpt_PT
oaire.citation.volume95pt_PT
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
rcaap.typearticlept_PT

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