Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation

Bernd Deutschmann; Gunter Winkler; Timucin David Karaca

Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation

Bernd Deutschmann, Gunter Winkler, Timucin David Karaca

Institute of Electronics (4390)

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

Abstract

Due to their high efficiency compared to conventional Class AB amplifiers, Class D audio amplifiers have increasingly become the amplifier of choice especially for low power applications such as portable electronics. However, Class D amplifiers are still a major source of electromagnetic emission of the electronic applications in which they are used. In this paper the benefits of using spread spectrum techniques in order to reduce the emission of Class D audio amplifiers is highlighted. Based on IC-level measurement results of a 10W Mono Class D speaker amplifier, that allows to be synchronized to an external clock, it is shown how spread spectrum parameters like deviation, modulation frequency and modulation signal can be optimized in order to maximize the reduction of the emission.

Original language	English
Title of host publication	2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)
Publisher	Institute of Electrical and Electronics Engineers
Number of pages	6
ISBN (Electronic)	978-1-4673-7897-0
Publication status	Published - Nov 2015
Event	International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo) - Edinburgh, United Kingdom Duration: 10 Nov 2015 → 13 Nov 2015

Conference

Conference	International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)
Country/Territory	United Kingdom
City	Edinburgh
Period	10/11/15 → 13/11/15

Keywords

Class D Audio Amplifier
Common Mode Emission
IEC 61967
Spread Spectrum Technique
EMI

Fields of Expertise

Information, Communication & Computing

Treatment code (Nähere Zuordnung)

Experimental

LEAD - LEAD-Low Emission Analog Design
Auer, M.
1/08/14 → 31/07/17
Project: Research project

Cite this

Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation. / Deutschmann, Bernd ; Winkler, Gunter; Karaca, Timucin David.
2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo). Institute of Electrical and Electronics Engineers, 2015.

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

Deutschmann, B , Winkler, G & Karaca, TD 2015, Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation. in 2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo). Institute of Electrical and Electronics Engineers, International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo), Edinburgh, United Kingdom, 10/11/15.

@inproceedings{99ed89de1ecb480c8cc7905a1630d2bd,

title = "Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation",

abstract = "Due to their high efficiency compared to conventional Class AB amplifiers, Class D audio amplifiers have increasingly become the amplifier of choice especially for low power applications such as portable electronics. However, Class D amplifiers are still a major source of electromagnetic emission of the electronic applications in which they are used. In this paper the benefits of using spread spectrum techniques in order to reduce the emission of Class D audio amplifiers is highlighted. Based on IC-level measurement results of a 10W Mono Class D speaker amplifier, that allows to be synchronized to an external clock, it is shown how spread spectrum parameters like deviation, modulation frequency and modulation signal can be optimized in order to maximize the reduction of the emission.",

keywords = "Class D Audio Amplifier, Common Mode Emission, IEC 61967, Spread Spectrum Technique, EMI",

author = "Bernd Deutschmann and Gunter Winkler and Karaca, {Timucin David}",

year = "2015",

month = nov,

language = "English",

booktitle = "2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)",

publisher = "Institute of Electrical and Electronics Engineers",

address = "United States",

note = "International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo) ; Conference date: 10-11-2015 Through 13-11-2015",

}

TY - GEN

T1 - Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation

AU - Deutschmann, Bernd

AU - Winkler, Gunter

AU - Karaca, Timucin David

PY - 2015/11

Y1 - 2015/11

N2 - Due to their high efficiency compared to conventional Class AB amplifiers, Class D audio amplifiers have increasingly become the amplifier of choice especially for low power applications such as portable electronics. However, Class D amplifiers are still a major source of electromagnetic emission of the electronic applications in which they are used. In this paper the benefits of using spread spectrum techniques in order to reduce the emission of Class D audio amplifiers is highlighted. Based on IC-level measurement results of a 10W Mono Class D speaker amplifier, that allows to be synchronized to an external clock, it is shown how spread spectrum parameters like deviation, modulation frequency and modulation signal can be optimized in order to maximize the reduction of the emission.

AB - Due to their high efficiency compared to conventional Class AB amplifiers, Class D audio amplifiers have increasingly become the amplifier of choice especially for low power applications such as portable electronics. However, Class D amplifiers are still a major source of electromagnetic emission of the electronic applications in which they are used. In this paper the benefits of using spread spectrum techniques in order to reduce the emission of Class D audio amplifiers is highlighted. Based on IC-level measurement results of a 10W Mono Class D speaker amplifier, that allows to be synchronized to an external clock, it is shown how spread spectrum parameters like deviation, modulation frequency and modulation signal can be optimized in order to maximize the reduction of the emission.

KW - Class D Audio Amplifier

KW - Common Mode Emission

KW - IEC 61967

KW - Spread Spectrum Technique

KW - EMI

M3 - Conference paper

BT - 2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)

PB - Institute of Electrical and Electronics Engineers

T2 - International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)

Y2 - 10 November 2015 through 13 November 2015

ER -

Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation

Abstract

Conference

Keywords

Fields of Expertise

Treatment code (Nähere Zuordnung)

Projects

LEAD - LEAD-Low Emission Analog Design

Cite this