An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive Sensors

Autores
Gelmini, Daniel; Haberman, Marcelo Alejandro; Ferrari, Vittorio; Spinelli, Enrique Mario; Reverter, Ferran
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A novel front-end circuit for capacitive sensors with one terminal grounded is proposed and evaluated in this article. For the first time, it is suggested to employ an isolation amplifier (IsoAmp) in the front-end circuit of a capacitive sensor. Thanks to this IsoAmp, a floating voltage source is generated that appropriately excites the capacitive sensor. In addition, the concept of active shielding is applied so as to be able to measure remote sensors that are interconnected through a shielded cable. The theoretical, simulation, and experimental results reported herein demonstrate that the sensitivity of the circuit does not depend on the parasitic capacitance of the cable. However, such a parasitic does alter the offset of the input-output characteristic mainly due to the non-idealities of the IsoAmp. In terms of linearity, the proposed front-end circuit offers remarkable values, with a maximum non-linearity error of around 0.1% Full-Scale Span (FSS) in the 1-10 pF range, and 0.01% FSS in the 10-100 pF range.
Fil: Gelmini, Daniel. University Of Brescia; Italia
Fil: Haberman, Marcelo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales. Universidad Nacional de La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales; Argentina
Fil: Ferrari, Vittorio. University Of Brescia; Italia
Fil: Spinelli, Enrique Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales. Universidad Nacional de La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales; Argentina
Fil: Reverter, Ferran. Universidad Politécnica de Catalunya; España
Materia
Active shielding
capacitive sensor
front-end circuit
grounded capacitive sensor
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/262275
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/262275
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive SensorsGelmini, DanielHaberman, Marcelo AlejandroFerrari, VittorioSpinelli, Enrique MarioReverter, FerranActive shieldingcapacitive sensorfront-end circuitgrounded capacitive sensorhttps://purl.org/becyt/ford/2.2https://purl.org/becyt/ford/2A novel front-end circuit for capacitive sensors with one terminal grounded is proposed and evaluated in this article. For the first time, it is suggested to employ an isolation amplifier (IsoAmp) in the front-end circuit of a capacitive sensor. Thanks to this IsoAmp, a floating voltage source is generated that appropriately excites the capacitive sensor. In addition, the concept of active shielding is applied so as to be able to measure remote sensors that are interconnected through a shielded cable. The theoretical, simulation, and experimental results reported herein demonstrate that the sensitivity of the circuit does not depend on the parasitic capacitance of the cable. However, such a parasitic does alter the offset of the input-output characteristic mainly due to the non-idealities of the IsoAmp. In terms of linearity, the proposed front-end circuit offers remarkable values, with a maximum non-linearity error of around 0.1% Full-Scale Span (FSS) in the 1-10 pF range, and 0.01% FSS in the 10-100 pF range.Fil: Gelmini, Daniel. University Of Brescia; ItaliaFil: Haberman, Marcelo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales. Universidad Nacional de La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales; ArgentinaFil: Ferrari, Vittorio. University Of Brescia; ItaliaFil: Spinelli, Enrique Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales. Universidad Nacional de La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales; ArgentinaFil: Reverter, Ferran. Universidad Politécnica de Catalunya; EspañaInstitute of Electrical and Electronics Engineers2024-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/262275Gelmini, Daniel; Haberman, Marcelo Alejandro; Ferrari, Vittorio; Spinelli, Enrique Mario; Reverter, Ferran; An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive Sensors; Institute of Electrical and Electronics Engineers; Ieee Transactions on Instrumentation and Measurement; 73; 6-2024; 1-100018-9456CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://ieeexplore.ieee.org/document/10555416/info:eu-repo/semantics/altIdentifier/doi/10.1109/TIM.2024.3413177info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:33:33Zoai:ri.conicet.gov.ar:11336/262275instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:33:33.87CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive Sensors
title An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive Sensors
spellingShingle An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive Sensors
Gelmini, Daniel
Active shielding
capacitive sensor
front-end circuit
grounded capacitive sensor
title_short An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive Sensors
title_full An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive Sensors
title_fullStr An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive Sensors
title_full_unstemmed An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive Sensors
title_sort An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive Sensors
dc.creator.none.fl_str_mv Gelmini, Daniel
Haberman, Marcelo Alejandro
Ferrari, Vittorio
Spinelli, Enrique Mario
Reverter, Ferran
author Gelmini, Daniel
author_facet Gelmini, Daniel
Haberman, Marcelo Alejandro
Ferrari, Vittorio
Spinelli, Enrique Mario
Reverter, Ferran
author_role author
author2 Haberman, Marcelo Alejandro
Ferrari, Vittorio
Spinelli, Enrique Mario
Reverter, Ferran
author2_role author
author
author
author
dc.subject.none.fl_str_mv Active shielding
capacitive sensor
front-end circuit
grounded capacitive sensor
topic Active shielding
capacitive sensor
front-end circuit
grounded capacitive sensor
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.2
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv A novel front-end circuit for capacitive sensors with one terminal grounded is proposed and evaluated in this article. For the first time, it is suggested to employ an isolation amplifier (IsoAmp) in the front-end circuit of a capacitive sensor. Thanks to this IsoAmp, a floating voltage source is generated that appropriately excites the capacitive sensor. In addition, the concept of active shielding is applied so as to be able to measure remote sensors that are interconnected through a shielded cable. The theoretical, simulation, and experimental results reported herein demonstrate that the sensitivity of the circuit does not depend on the parasitic capacitance of the cable. However, such a parasitic does alter the offset of the input-output characteristic mainly due to the non-idealities of the IsoAmp. In terms of linearity, the proposed front-end circuit offers remarkable values, with a maximum non-linearity error of around 0.1% Full-Scale Span (FSS) in the 1-10 pF range, and 0.01% FSS in the 10-100 pF range.
Fil: Gelmini, Daniel. University Of Brescia; Italia
Fil: Haberman, Marcelo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales. Universidad Nacional de La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales; Argentina
Fil: Ferrari, Vittorio. University Of Brescia; Italia
Fil: Spinelli, Enrique Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales. Universidad Nacional de La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales; Argentina
Fil: Reverter, Ferran. Universidad Politécnica de Catalunya; España
description A novel front-end circuit for capacitive sensors with one terminal grounded is proposed and evaluated in this article. For the first time, it is suggested to employ an isolation amplifier (IsoAmp) in the front-end circuit of a capacitive sensor. Thanks to this IsoAmp, a floating voltage source is generated that appropriately excites the capacitive sensor. In addition, the concept of active shielding is applied so as to be able to measure remote sensors that are interconnected through a shielded cable. The theoretical, simulation, and experimental results reported herein demonstrate that the sensitivity of the circuit does not depend on the parasitic capacitance of the cable. However, such a parasitic does alter the offset of the input-output characteristic mainly due to the non-idealities of the IsoAmp. In terms of linearity, the proposed front-end circuit offers remarkable values, with a maximum non-linearity error of around 0.1% Full-Scale Span (FSS) in the 1-10 pF range, and 0.01% FSS in the 10-100 pF range.
publishDate 2024
dc.date.none.fl_str_mv 2024-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/262275
Gelmini, Daniel; Haberman, Marcelo Alejandro; Ferrari, Vittorio; Spinelli, Enrique Mario; Reverter, Ferran; An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive Sensors; Institute of Electrical and Electronics Engineers; Ieee Transactions on Instrumentation and Measurement; 73; 6-2024; 1-10
0018-9456
CONICET Digital
CONICET
url http://hdl.handle.net/11336/262275
identifier_str_mv Gelmini, Daniel; Haberman, Marcelo Alejandro; Ferrari, Vittorio; Spinelli, Enrique Mario; Reverter, Ferran; An Isolation Amplifier-Based Front-End Circuit for Grounded Capacitive Sensors; Institute of Electrical and Electronics Engineers; Ieee Transactions on Instrumentation and Measurement; 73; 6-2024; 1-10
0018-9456
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ieeexplore.ieee.org/document/10555416/
info:eu-repo/semantics/altIdentifier/doi/10.1109/TIM.2024.3413177
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers
publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1844614351369011200
score 13.069144

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