Novel voltage Multiplier/Divider-based active square law detector for heartbeat measurement

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dc.contributor.authorŠotner, Romancs
dc.contributor.authorPolák, Ladislavcs
dc.contributor.authorJeřábek, Jancs
dc.contributor.authorLanghammer, Lukášcs
dc.contributor.authorFreeborn, Toddcs
dc.coverage.issue2cs
dc.coverage.volume226cs
dc.date.issued2024-02-28cs
dc.description.abstractThis paper describes a novel active voltage detector that is capable of processing analog signals with levels from units of mV up to 250 mV. An advantage of the proposed circuit is that the relationship between output voltage and input level is not linear but quadratic, which increases the sensitivity when processing low-level signals. The presented solution has tuning parameters for correction or intentional shift of internal DC offset and electronic control of the output signal gain level. The application example presents detection of beats per minute (BPM) in the range of 6-300 BPM, which corresponds to a frequency range of 0.1-5 Hz. The advantage of the presented solution is that the output of the circuit is directly a digital signal compatible with TTL levels, so there is no need for any analog to digital converter to produce a digital signal for further processing.en
dc.description.embargo2026-01-26cs
dc.formattextcs
dc.format.extent1-12cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMEASUREMENT, Journal of the International Measurement Confederation (IMEKO) . 2024, vol. 226, issue 2, p. 1-12.en
dc.identifier.doi10.1016/j.measurement.2024.114145cs
dc.identifier.issn0263-2241cs
dc.identifier.orcid0000-0002-2430-1815cs
dc.identifier.orcid0000-0001-7084-6210cs
dc.identifier.orcid0000-0001-9487-5024cs
dc.identifier.orcid0000-0002-2136-1601cs
dc.identifier.other188348cs
dc.identifier.researcheridG-4209-2017cs
dc.identifier.researcheridE-3929-2018cs
dc.identifier.researcheridG-6453-2018cs
dc.identifier.scopus21834721500cs
dc.identifier.scopus36167253100cs
dc.identifier.scopus23011945600cs
dc.identifier.scopus56857453900cs
dc.identifier.urihttp://hdl.handle.net/11012/249344
dc.language.isoencs
dc.publisherELSEVIER SCI LTDcs
dc.relation.ispartofMEASUREMENT, Journal of the International Measurement Confederation (IMEKO)cs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0263224124000290?via%3Dihubcs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessembargoedAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/0263-2241/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectAnalog multiplieren
dc.subjectBeats per minute (BPM)en
dc.subjectDetectoren
dc.subjectHeart rateen
dc.subjectSensing readouten
dc.subjectSchmitt comparatoren
dc.subjectVariable gain amplifieren
dc.titleNovel voltage Multiplier/Divider-based active square law detector for heartbeat measurementen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionacceptedVersionen
sync.item.dbidVAV-188348en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:41:52en
sync.item.modts2025.01.17 18:46:24en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav radioelektronikycs
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav telekomunikacícs
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