CMOS Current Feedback Operational Amplifier-Based Relaxation Generator for Capacity to Voltage Sensor Interface

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dc.contributor.authorPolák, Ladislavcs
dc.contributor.authorŠotner, Romancs
dc.contributor.authorPetržela, Jiřícs
dc.contributor.authorJeřábek, Jancs
dc.coverage.issue12cs
dc.coverage.volume18cs
dc.date.issued2018-12-18cs
dc.description.abstractThis paper presents a simple relaxation generator, suitable for a sensor interface, operating as a transducer of capacitance to frequency/period. The proposed circuit employs a current feedback operational amplifier, fabricated in I3T25 0.35 m ON Semiconductor CMOS process, and four passive elements including a grounded capacitor (the sensed parameter). It offers a low-impedance voltage output of the generated square wave. Additional frequency to DC voltage converter offers output information in the form of voltage. The experimental capacitance variation from 6.8 nF to 100 nF yields voltage change in the range from 21 mV to 106 mV with error below 5% and sensitivity 0.912 mV/nF evaluated over the full range of change. These values are in good agreement with simulation results obtained from the Mathcad model of frequency to DC voltage transducer passive circuit.en
dc.formattextcs
dc.format.extent1-15cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationSENSORS. 2018, vol. 18, issue 12, p. 1-15.en
dc.identifier.doi10.3390/s18124488cs
dc.identifier.issn1424-8220cs
dc.identifier.orcid0000-0001-7084-6210cs
dc.identifier.orcid0000-0002-2430-1815cs
dc.identifier.orcid0000-0001-5286-9574cs
dc.identifier.orcid0000-0001-9487-5024cs
dc.identifier.other151967cs
dc.identifier.researcheridG-4209-2017cs
dc.identifier.researcheridDZG-2188-2022cs
dc.identifier.researcheridE-3929-2018cs
dc.identifier.scopus36167253100cs
dc.identifier.scopus21834721500cs
dc.identifier.scopus9333762000cs
dc.identifier.scopus23011945600cs
dc.identifier.urihttp://hdl.handle.net/11012/179678
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofSENSORScs
dc.relation.urihttps://www.mdpi.com/1424-8220/18/12/4488cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1424-8220/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectcapacity sensor interfaceen
dc.subjectcapacity measurementen
dc.subjectcurrent feedback operational amplifieren
dc.subjectrelaxation generatoren
dc.subjectsquare wave generatoren
dc.titleCMOS Current Feedback Operational Amplifier-Based Relaxation Generator for Capacity to Voltage Sensor Interfaceen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-151967en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:41:29en
sync.item.modts2025.01.17 18:35:24en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav radioelektronikycs
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