Digitally assisted EMI-reduction techniques for Class-D amplifiers with digital control

Mario Auer; Timuçin Karaca

Digitally assisted EMI-reduction techniques for Class-D amplifiers with digital control

Mario Auer
, Timuçin Karaca

Institute of Electronics (4390)

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

Abstract

Class-D amplifiers are known for their excellent efficiency but also for their high potential to produce electromagnetic interference (EMI). Typically Class-D amplifiers operate in the analog domain, but there is a clear trend to replace some of the functionality by digital circuitry, requiring new approaches to reduce their emissions. In this paper a prototype of a digitally controlled Class-D amplifier is used to present digital techniques to reduce EMI with various methods. A new method is realized and the advantages of digitally assisted EMI reduction methods are demonstrated. Measurement results show that a considerable (up to 17.8 dB) reduction of EMI is possible taking advantage of digitally assisted EMI reduction techniques while delivering state-of-the art audio performance.

Original language	English
Title of host publication	Proceedings of the 2017 11th International Workshop on the Electromagnetic Compatibility of Integrated Circuits, EMCCompo 2017
Publisher	IEEE
Pages	33-38
Number of pages	6
ISBN (Electronic)	9781538626894
Publication status	Published - 31 Jul 2017
Event	11th International Workshop on the Electromagnetic Compatibility of Integrated Circuits: EMC Compo 2017 - St. Petersburg, Russian Federation Duration: 4 Jul 2017 → 8 Jul 2017 Conference number: 11

Conference

Conference	11th International Workshop on the Electromagnetic Compatibility of Integrated Circuits
Abbreviated title	EMC Compo 2017
Country/Territory	Russian Federation
City	St. Petersburg
Period	4/07/17 → 8/07/17

Keywords

Characterization
Class-D Audio Amplifier
Digital Class-D
EMC
EMI
Prototyping
Spread Spectrum Modulation

ASJC Scopus subject areas

Electrical and Electronic Engineering
Safety, Risk, Reliability and Quality
Electronic, Optical and Magnetic Materials

Fields of Expertise

Information, Communication & Computing

LEAD - LEAD-Low Emission Analog Design
Auer, M. (Project manager on research unit) & Auer, M. (Consortium manager resp. coordinator with external organisations)
1/08/14 → 31/07/17
Project: Research project

Cite this

Digitally assisted EMI-reduction techniques for Class-D amplifiers with digital control. / Auer, Mario; Karaca, Timuçin.
Proceedings of the 2017 11th International Workshop on the Electromagnetic Compatibility of Integrated Circuits, EMCCompo 2017. IEEE, 2017. p. 33-38 7998077.

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

Auer, M & Karaca, T 2017, Digitally assisted EMI-reduction techniques for Class-D amplifiers with digital control. in Proceedings of the 2017 11th International Workshop on the Electromagnetic Compatibility of Integrated Circuits, EMCCompo 2017., 7998077, IEEE, pp. 33-38, 11th International Workshop on the Electromagnetic Compatibility of Integrated Circuits, St. Petersburg, Russian Federation, 4/07/17.

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title = "Digitally assisted EMI-reduction techniques for Class-D amplifiers with digital control",

abstract = "Class-D amplifiers are known for their excellent efficiency but also for their high potential to produce electromagnetic interference (EMI). Typically Class-D amplifiers operate in the analog domain, but there is a clear trend to replace some of the functionality by digital circuitry, requiring new approaches to reduce their emissions. In this paper a prototype of a digitally controlled Class-D amplifier is used to present digital techniques to reduce EMI with various methods. A new method is realized and the advantages of digitally assisted EMI reduction methods are demonstrated. Measurement results show that a considerable (up to 17.8 dB) reduction of EMI is possible taking advantage of digitally assisted EMI reduction techniques while delivering state-of-the art audio performance.",

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AU - Karaca, Timuçin

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Y1 - 2017/7/31

N2 - Class-D amplifiers are known for their excellent efficiency but also for their high potential to produce electromagnetic interference (EMI). Typically Class-D amplifiers operate in the analog domain, but there is a clear trend to replace some of the functionality by digital circuitry, requiring new approaches to reduce their emissions. In this paper a prototype of a digitally controlled Class-D amplifier is used to present digital techniques to reduce EMI with various methods. A new method is realized and the advantages of digitally assisted EMI reduction methods are demonstrated. Measurement results show that a considerable (up to 17.8 dB) reduction of EMI is possible taking advantage of digitally assisted EMI reduction techniques while delivering state-of-the art audio performance.

AB - Class-D amplifiers are known for their excellent efficiency but also for their high potential to produce electromagnetic interference (EMI). Typically Class-D amplifiers operate in the analog domain, but there is a clear trend to replace some of the functionality by digital circuitry, requiring new approaches to reduce their emissions. In this paper a prototype of a digitally controlled Class-D amplifier is used to present digital techniques to reduce EMI with various methods. A new method is realized and the advantages of digitally assisted EMI reduction methods are demonstrated. Measurement results show that a considerable (up to 17.8 dB) reduction of EMI is possible taking advantage of digitally assisted EMI reduction techniques while delivering state-of-the art audio performance.

KW - Characterization

KW - Class-D Audio Amplifier

KW - Digital Class-D

KW - EMC

KW - EMI

KW - Prototyping

KW - Spread Spectrum Modulation

M3 - Conference paper

AN - SCOPUS:85028506447

SP - 33

EP - 38

BT - Proceedings of the 2017 11th International Workshop on the Electromagnetic Compatibility of Integrated Circuits, EMCCompo 2017

PB - IEEE

T2 - 11th International Workshop on the Electromagnetic Compatibility of Integrated Circuits

Y2 - 4 July 2017 through 8 July 2017

ER -

Digitally assisted EMI-reduction techniques for Class-D amplifiers with digital control

Abstract

Conference

Keywords

ASJC Scopus subject areas

Fields of Expertise

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Projects

LEAD - LEAD-Low Emission Analog Design

Cite this