A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation

Autores
Oliva, Alejandro Raul; Ang, Simon S.; Vo, Thuy V.
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Voltage feedback is frequently used in class-D switching audio power amplifiers. This paper discusses the design and implementation of a low-cost filterless class-D, unipolar pulse-width modulation switching audio amplifier having a multi-loop voltage feedback scheme. Classical frequency-compensation techniques are used to design and stabilize the three voltage feedback loops implemented in this application. This design method proves to be a cost-effective solution for designing high-fidelity (hi-fi) audio amplifiers. The cost is reduced because no output filter is used, the required switching frequency is half of the one needed if bipolar PWM was used, and no current sensor is needed for feedback purposes. The output impedance is extremely low due to the reduction of the successive voltage loops, making the amplifier less load dependent. Simulation results show that a total harmonic distortion (THD) of 0.005% can be achieved using this topology, as well as a flat frequency response, free of phase distortion in the audio band. Experimental results show the feasibility of this control scheme, since a THD of 0.05% was achieved with a laboratory prototyped amplifier. A comparison of the performance of this audio amplifier with that of some commercial class-D audio amplifiers, reveals that our design can seriously compete with some of the ICs leading the market at a lower cost.
Fil: Oliva, Alejandro Raul. University of Arkansas; Estados Unidos. Universidad Nacional del Sur. Departamento de Ingeniería Eléctrica y de Computadoras; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina
Fil: Ang, Simon S.. University of Arkansas; Estados Unidos
Fil: Vo, Thuy V.. University of Arkansas; Estados Unidos
Materia
AMPLIFIER DISTORTION
AUDIO AMPLIFIER
CLASS-D AMPLIFIER
FEEDBACK AMPLIFIERS
POWER AMPLIFIERS
SWITCHING AMPLIFIERS
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:11336/100978
Acceder
id CONICETDig_47b488fa3d88244a76a1522d732ce815
oai_identifier_str oai:ri.conicet.gov.ar:11336/100978
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulationOliva, Alejandro RaulAng, Simon S.Vo, Thuy V.AMPLIFIER DISTORTIONAUDIO AMPLIFIERCLASS-D AMPLIFIERFEEDBACK AMPLIFIERSPOWER AMPLIFIERSSWITCHING AMPLIFIERShttps://purl.org/becyt/ford/2.2https://purl.org/becyt/ford/2Voltage feedback is frequently used in class-D switching audio power amplifiers. This paper discusses the design and implementation of a low-cost filterless class-D, unipolar pulse-width modulation switching audio amplifier having a multi-loop voltage feedback scheme. Classical frequency-compensation techniques are used to design and stabilize the three voltage feedback loops implemented in this application. This design method proves to be a cost-effective solution for designing high-fidelity (hi-fi) audio amplifiers. The cost is reduced because no output filter is used, the required switching frequency is half of the one needed if bipolar PWM was used, and no current sensor is needed for feedback purposes. The output impedance is extremely low due to the reduction of the successive voltage loops, making the amplifier less load dependent. Simulation results show that a total harmonic distortion (THD) of 0.005% can be achieved using this topology, as well as a flat frequency response, free of phase distortion in the audio band. Experimental results show the feasibility of this control scheme, since a THD of 0.05% was achieved with a laboratory prototyped amplifier. A comparison of the performance of this audio amplifier with that of some commercial class-D audio amplifiers, reveals that our design can seriously compete with some of the ICs leading the market at a lower cost.Fil: Oliva, Alejandro Raul. University of Arkansas; Estados Unidos. Universidad Nacional del Sur. Departamento de Ingeniería Eléctrica y de Computadoras; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; ArgentinaFil: Ang, Simon S.. University of Arkansas; Estados UnidosFil: Vo, Thuy V.. University of Arkansas; Estados UnidosInstitute of Electrical and Electronics Engineers2004-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/100978Oliva, Alejandro Raul; Ang, Simon S.; Vo, Thuy V.; A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation; Institute of Electrical and Electronics Engineers; Ieee Transactions On Consumer Electronics; 50; 1; 2-2004; 312-3190098-30631558-4127CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1109/TCE.2004.1277879info:eu-repo/semantics/altIdentifier/url/https://ieeexplore.ieee.org/document/1277879info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:44:07Zoai:ri.conicet.gov.ar:11336/100978instacron: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 09:44:07.357CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation
title A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation
spellingShingle A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation
Oliva, Alejandro Raul
AMPLIFIER DISTORTION
AUDIO AMPLIFIER
CLASS-D AMPLIFIER
FEEDBACK AMPLIFIERS
POWER AMPLIFIERS
SWITCHING AMPLIFIERS
title_short A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation
title_full A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation
title_fullStr A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation
title_full_unstemmed A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation
title_sort A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation
dc.creator.none.fl_str_mv Oliva, Alejandro Raul
Ang, Simon S.
Vo, Thuy V.
author Oliva, Alejandro Raul
author_facet Oliva, Alejandro Raul
Ang, Simon S.
Vo, Thuy V.
author_role author
author2 Ang, Simon S.
Vo, Thuy V.
author2_role author
author
dc.subject.none.fl_str_mv AMPLIFIER DISTORTION
AUDIO AMPLIFIER
CLASS-D AMPLIFIER
FEEDBACK AMPLIFIERS
POWER AMPLIFIERS
SWITCHING AMPLIFIERS
topic AMPLIFIER DISTORTION
AUDIO AMPLIFIER
CLASS-D AMPLIFIER
FEEDBACK AMPLIFIERS
POWER AMPLIFIERS
SWITCHING AMPLIFIERS
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.2
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Voltage feedback is frequently used in class-D switching audio power amplifiers. This paper discusses the design and implementation of a low-cost filterless class-D, unipolar pulse-width modulation switching audio amplifier having a multi-loop voltage feedback scheme. Classical frequency-compensation techniques are used to design and stabilize the three voltage feedback loops implemented in this application. This design method proves to be a cost-effective solution for designing high-fidelity (hi-fi) audio amplifiers. The cost is reduced because no output filter is used, the required switching frequency is half of the one needed if bipolar PWM was used, and no current sensor is needed for feedback purposes. The output impedance is extremely low due to the reduction of the successive voltage loops, making the amplifier less load dependent. Simulation results show that a total harmonic distortion (THD) of 0.005% can be achieved using this topology, as well as a flat frequency response, free of phase distortion in the audio band. Experimental results show the feasibility of this control scheme, since a THD of 0.05% was achieved with a laboratory prototyped amplifier. A comparison of the performance of this audio amplifier with that of some commercial class-D audio amplifiers, reveals that our design can seriously compete with some of the ICs leading the market at a lower cost.
Fil: Oliva, Alejandro Raul. University of Arkansas; Estados Unidos. Universidad Nacional del Sur. Departamento de Ingeniería Eléctrica y de Computadoras; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina
Fil: Ang, Simon S.. University of Arkansas; Estados Unidos
Fil: Vo, Thuy V.. University of Arkansas; Estados Unidos
description Voltage feedback is frequently used in class-D switching audio power amplifiers. This paper discusses the design and implementation of a low-cost filterless class-D, unipolar pulse-width modulation switching audio amplifier having a multi-loop voltage feedback scheme. Classical frequency-compensation techniques are used to design and stabilize the three voltage feedback loops implemented in this application. This design method proves to be a cost-effective solution for designing high-fidelity (hi-fi) audio amplifiers. The cost is reduced because no output filter is used, the required switching frequency is half of the one needed if bipolar PWM was used, and no current sensor is needed for feedback purposes. The output impedance is extremely low due to the reduction of the successive voltage loops, making the amplifier less load dependent. Simulation results show that a total harmonic distortion (THD) of 0.005% can be achieved using this topology, as well as a flat frequency response, free of phase distortion in the audio band. Experimental results show the feasibility of this control scheme, since a THD of 0.05% was achieved with a laboratory prototyped amplifier. A comparison of the performance of this audio amplifier with that of some commercial class-D audio amplifiers, reveals that our design can seriously compete with some of the ICs leading the market at a lower cost.
publishDate 2004
dc.date.none.fl_str_mv 2004-02
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/11336/100978
Oliva, Alejandro Raul; Ang, Simon S.; Vo, Thuy V.; A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation; Institute of Electrical and Electronics Engineers; Ieee Transactions On Consumer Electronics; 50; 1; 2-2004; 312-319
0098-3063
1558-4127
CONICET Digital
CONICET
url http://hdl.handle.net/11336/100978
identifier_str_mv Oliva, Alejandro Raul; Ang, Simon S.; Vo, Thuy V.; A multi-loop voltage-feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation; Institute of Electrical and Electronics Engineers; Ieee Transactions On Consumer Electronics; 50; 1; 2-2004; 312-319
0098-3063
1558-4127
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1109/TCE.2004.1277879
info:eu-repo/semantics/altIdentifier/url/https://ieeexplore.ieee.org/document/1277879
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_ 1842268646354714624
score 13.13397

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