31.3 nW, 0.5 V Bulk-Driven OTA for Biosignal Processing

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dc.contributor.authorKumngern, Montreecs
dc.contributor.authorKulej, Tomaszcs
dc.contributor.authorKhateb, Fabiancs
dc.coverage.issue1cs
dc.coverage.volume11cs
dc.date.issued2023-05-24cs
dc.description.abstractThis paper presents a new extremely low-voltage low-power bulk-driven (BD) operational transconductance amplifier (OTA) realized for low frequency biosignal processing. The CMOS structure of the OTA utilizes bulk-driven and self-cascode techniques in the subthreshold region, supporting the operation with the supply voltage (V-DD) as the threshold voltage (V-TH) of a single MOS transistor, i.e., V-DD = V-TH = 0.5 V, while offering nano power consumption (31.3 nW for 15 nA nominal setting current). Using the extremely low-voltage and low-power OTA in biosignal processing enables extending the lifetime of applications that are powered by battery or energy harvesting sources. The OTA has a 54.7 dB low frequency gain, 6.18 kHz gain bandwidth and 75 degrees phase margin at 15 pF load capacitance. The proposed OTA has been used to realize a bandpass filter (BPF) with adjustable gain for electrocardiogram (ECG) signal processing. The higher cutoff frequency of the BPF is adjustable electronically by a setting current and the BPF's gain can be adjusted by capacitors value. The total harmonic distortion (THD) of the BPF is -53.56 dB, the input integrated input-referred voltage noise is 17.9 mu V-rms, the common mode rejection ratio (CMRR) is 75 dB and the power supply rejection ratio (PSRR) is 87.7 dB. The BPF was designed in the Cadence program using 0.18 mu m CMOS technology from TSMC. The simulation results agree with the presented theory.en
dc.formattextcs
dc.format.extent56516-56525cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationIEEE Access. 2023, vol. 11, issue 1, p. 56516-56525.en
dc.identifier.doi10.1109/ACCESS.2023.3279727cs
dc.identifier.issn2169-3536cs
dc.identifier.orcid0000-0002-9864-9830cs
dc.identifier.other183973cs
dc.identifier.researcheridO-6465-2014cs
dc.identifier.scopus36185268100cs
dc.identifier.urihttp://hdl.handle.net/11012/213551
dc.language.isoencs
dc.publisherIEEEcs
dc.relation.ispartofIEEE Accesscs
dc.relation.urihttps://ieeexplore.ieee.org/document/10132880cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2169-3536/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectOperational transconductance amplifier (OTA)en
dc.subjectbulk-drivenen
dc.subjectband-pass filteren
dc.subjectlow-voltageen
dc.subjectlow-power CMOSen
dc.title31.3 nW, 0.5 V Bulk-Driven OTA for Biosignal Processingen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-183973en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:41:13en
sync.item.modts2025.01.17 16:50:53en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav mikroelektronikycs
thesis.grantorVysoké učení technické v Brně. Ústav soudního inženýrství. Ústav soudního inženýrstvícs
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