An ultra-low noise fully-differential amplifier

Autores
Spinelli, Enrique Mario; Haberman, Marcelo Alejandro
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A general-purpose instrumentation amplifier must be dc-coupled and has a differential input to handle both differential and single-ended input signals. It must also exhibit low input noise in both voltage and current to accommodate a wide range of signal source impedances. Additionally, having a differential output is desirable to allow direct connection to current high-resolution analog-to-digital converters (ADCs), which have differential inputs. There are commercially available devices with en voltage noise spectral densities as low as 1 nV/Hz−−−√ but present high current noise spectral densities in of a few pA/Hz−−−√ . On the other hand, there are also devices with in as low as a few fA/Hz−−−√ but presenting en around 10 nV/Hz−−−√ . To obtain low values of both en and in , a fully differential circuit topology combining discrete junction field transistors (JFETs) and operational amplifiers (OAs) is proposed. Design equations, stability analysis, and experimental results are presented. As an example, a fully differential instrumentation amplifier has been designed, built, and tested showing en<1 nV/Hz−−−√ at 1 kHz and in<10 fA/Hz−−−√ at 1 kHz. The proposed topology finds applications, such as front ends for measuring and testing instruments, industrial instrumentation, and audio circuits.
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: 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
Materia
ultra-low noise amplifier
fully-differential circuit
instrumentation amplifier
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/262504
Acceder
id CONICETDig_5dc23d2d9bd7aff4152fa748c4efbf6b
oai_identifier_str oai:ri.conicet.gov.ar:11336/262504
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling An ultra-low noise fully-differential amplifierSpinelli, Enrique MarioHaberman, Marcelo Alejandroultra-low noise amplifierfully-differential circuitinstrumentation amplifierhttps://purl.org/becyt/ford/2.2https://purl.org/becyt/ford/2A general-purpose instrumentation amplifier must be dc-coupled and has a differential input to handle both differential and single-ended input signals. It must also exhibit low input noise in both voltage and current to accommodate a wide range of signal source impedances. Additionally, having a differential output is desirable to allow direct connection to current high-resolution analog-to-digital converters (ADCs), which have differential inputs. There are commercially available devices with en voltage noise spectral densities as low as 1 nV/Hz−−−√ but present high current noise spectral densities in of a few pA/Hz−−−√ . On the other hand, there are also devices with in as low as a few fA/Hz−−−√ but presenting en around 10 nV/Hz−−−√ . To obtain low values of both en and in , a fully differential circuit topology combining discrete junction field transistors (JFETs) and operational amplifiers (OAs) is proposed. Design equations, stability analysis, and experimental results are presented. As an example, a fully differential instrumentation amplifier has been designed, built, and tested showing en<1 nV/Hz−−−√ at 1 kHz and in<10 fA/Hz−−−√ at 1 kHz. The proposed topology finds applications, such as front ends for measuring and testing instruments, industrial instrumentation, and audio circuits.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; ArgentinaFil: 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; ArgentinaInstitute of Electrical and Electronics Engineers2024-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/262504Spinelli, Enrique Mario; Haberman, Marcelo Alejandro; An ultra-low noise fully-differential amplifier; Institute of Electrical and Electronics Engineers; Ieee Transactions on Instrumentation and Measurement; 73; 10-2024; 1-80018-9456CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://ieeexplore.ieee.org/document/10731870/info:eu-repo/semantics/altIdentifier/doi/10.1109/TIM.2024.3485398info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:57:51Zoai:ri.conicet.gov.ar:11336/262504instacron: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:34982025-09-03 09:57:51.897CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv An ultra-low noise fully-differential amplifier
title An ultra-low noise fully-differential amplifier
spellingShingle An ultra-low noise fully-differential amplifier
Spinelli, Enrique Mario
ultra-low noise amplifier
fully-differential circuit
instrumentation amplifier
title_short An ultra-low noise fully-differential amplifier
title_full An ultra-low noise fully-differential amplifier
title_fullStr An ultra-low noise fully-differential amplifier
title_full_unstemmed An ultra-low noise fully-differential amplifier
title_sort An ultra-low noise fully-differential amplifier
dc.creator.none.fl_str_mv Spinelli, Enrique Mario
Haberman, Marcelo Alejandro
author Spinelli, Enrique Mario
author_facet Spinelli, Enrique Mario
Haberman, Marcelo Alejandro
author_role author
author2 Haberman, Marcelo Alejandro
author2_role author
dc.subject.none.fl_str_mv ultra-low noise amplifier
fully-differential circuit
instrumentation amplifier
topic ultra-low noise amplifier
fully-differential circuit
instrumentation amplifier
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 general-purpose instrumentation amplifier must be dc-coupled and has a differential input to handle both differential and single-ended input signals. It must also exhibit low input noise in both voltage and current to accommodate a wide range of signal source impedances. Additionally, having a differential output is desirable to allow direct connection to current high-resolution analog-to-digital converters (ADCs), which have differential inputs. There are commercially available devices with en voltage noise spectral densities as low as 1 nV/Hz−−−√ but present high current noise spectral densities in of a few pA/Hz−−−√ . On the other hand, there are also devices with in as low as a few fA/Hz−−−√ but presenting en around 10 nV/Hz−−−√ . To obtain low values of both en and in , a fully differential circuit topology combining discrete junction field transistors (JFETs) and operational amplifiers (OAs) is proposed. Design equations, stability analysis, and experimental results are presented. As an example, a fully differential instrumentation amplifier has been designed, built, and tested showing en<1 nV/Hz−−−√ at 1 kHz and in<10 fA/Hz−−−√ at 1 kHz. The proposed topology finds applications, such as front ends for measuring and testing instruments, industrial instrumentation, and audio circuits.
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: 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
description A general-purpose instrumentation amplifier must be dc-coupled and has a differential input to handle both differential and single-ended input signals. It must also exhibit low input noise in both voltage and current to accommodate a wide range of signal source impedances. Additionally, having a differential output is desirable to allow direct connection to current high-resolution analog-to-digital converters (ADCs), which have differential inputs. There are commercially available devices with en voltage noise spectral densities as low as 1 nV/Hz−−−√ but present high current noise spectral densities in of a few pA/Hz−−−√ . On the other hand, there are also devices with in as low as a few fA/Hz−−−√ but presenting en around 10 nV/Hz−−−√ . To obtain low values of both en and in , a fully differential circuit topology combining discrete junction field transistors (JFETs) and operational amplifiers (OAs) is proposed. Design equations, stability analysis, and experimental results are presented. As an example, a fully differential instrumentation amplifier has been designed, built, and tested showing en<1 nV/Hz−−−√ at 1 kHz and in<10 fA/Hz−−−√ at 1 kHz. The proposed topology finds applications, such as front ends for measuring and testing instruments, industrial instrumentation, and audio circuits.
publishDate 2024
dc.date.none.fl_str_mv 2024-10
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/11336/262504
Spinelli, Enrique Mario; Haberman, Marcelo Alejandro; An ultra-low noise fully-differential amplifier; Institute of Electrical and Electronics Engineers; Ieee Transactions on Instrumentation and Measurement; 73; 10-2024; 1-8
0018-9456
CONICET Digital
CONICET
url http://hdl.handle.net/11336/262504
identifier_str_mv Spinelli, Enrique Mario; Haberman, Marcelo Alejandro; An ultra-low noise fully-differential amplifier; Institute of Electrical and Electronics Engineers; Ieee Transactions on Instrumentation and Measurement; 73; 10-2024; 1-8
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/10731870/
info:eu-repo/semantics/altIdentifier/doi/10.1109/TIM.2024.3485398
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv 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_ 1842269488478683136
score 13.13397

Publicaciones similares