Modeling Distortion Effects in Class-D Amplifier Filter Inductors

Arnold Knott; Tore Stegenborg-Andersen; Ole Cornelius Thomsen; Dominik Bortis; Johann W. Kolar; Gerhard Pfaffinger; Michael A. E. Andersen

Modeling Distortion Effects in Class-D Amplifier Filter Inductors

Arnold Knott
, Tore Stegenborg-Andersen
, Ole Cornelius Thomsen
, Dominik Bortis
, Johann W. Kolar
, Gerhard Pfaffinger
, Michael A. E. Andersen

Technical University of Denmark
Swiss Federal Institute of Technology Zurich
Harman/Becker Automotive Systems GmbH

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

Abstract

Distortion is generally accepted as a quantifier to judge the quality of audio power amplifiers. In switchmode power amplifiers various mechanisms influence this performance measure. After giving an overview of those, this paper focuses on the particular effect of the nonlinearity of the output filter components on the audio performance. While the physical reasons for both, the capacitor and the inductor induced distortion are given, the practical in depth demonstration is done for the inductor only. This includes measuring the inductors performance, modeling through fitting and resulting into simulation models. The fitted models achieve distortion values between 0.03 % and 0.2 % as a basis to enable the design of a 200 W amplifier.

Original language	English
Title of host publication	128th Audio Engineering Society Convention
Publisher	AES
Publication date	2010
Pages	7997
ISBN (Print)	978-0-937803-74-5
Publication status	Published - 2010
Event	128th Audio Engineering Society Convention - London, United Kingdom Duration: 22 May 2010 → 25 May 2010 Conference number: 128 http://www.aes.org/events/128/

Conference

Conference	128th Audio Engineering Society Convention
Number	128
Country/Territory	United Kingdom
City	London
Period	22/05/2010 → 25/05/2010
Internet address	http://www.aes.org/events/128/

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@inproceedings{1d7b4bfc92504d3aa4e326796fa890e9,

title = "Modeling Distortion Effects in Class-D Amplifier Filter Inductors",

abstract = "Distortion is generally accepted as a quantifier to judge the quality of audio power amplifiers. In switchmode power amplifiers various mechanisms influence this performance measure. After giving an overview of those, this paper focuses on the particular effect of the nonlinearity of the output filter components on the audio performance. While the physical reasons for both, the capacitor and the inductor induced distortion are given, the practical in depth demonstration is done for the inductor only. This includes measuring the inductors performance, modeling through fitting and resulting into simulation models. The fitted models achieve distortion values between 0.03 \% and 0.2 \% as a basis to enable the design of a 200 W amplifier.",

author = "Arnold Knott and Tore Stegenborg-Andersen and Thomsen, \{Ole Cornelius\} and Dominik Bortis and Kolar, \{Johann W.\} and Gerhard Pfaffinger and Andersen, \{Michael A. E.\}",

year = "2010",

language = "English",

isbn = "978-0-937803-74-5",

pages = "7997",

booktitle = "128th Audio Engineering Society Convention",

publisher = "AES",

note = "128th Audio Engineering Society Convention, AES'10 ; Conference date: 22-05-2010 Through 25-05-2010",

url = "http://www.aes.org/events/128/",

}

TY - GEN

T1 - Modeling Distortion Effects in Class-D Amplifier Filter Inductors

AU - Knott, Arnold

AU - Stegenborg-Andersen, Tore

AU - Thomsen, Ole Cornelius

AU - Bortis, Dominik

AU - Kolar, Johann W.

AU - Pfaffinger, Gerhard

AU - Andersen, Michael A. E.

N1 - Conference code: 128

PY - 2010

Y1 - 2010

N2 - Distortion is generally accepted as a quantifier to judge the quality of audio power amplifiers. In switchmode power amplifiers various mechanisms influence this performance measure. After giving an overview of those, this paper focuses on the particular effect of the nonlinearity of the output filter components on the audio performance. While the physical reasons for both, the capacitor and the inductor induced distortion are given, the practical in depth demonstration is done for the inductor only. This includes measuring the inductors performance, modeling through fitting and resulting into simulation models. The fitted models achieve distortion values between 0.03 % and 0.2 % as a basis to enable the design of a 200 W amplifier.

AB - Distortion is generally accepted as a quantifier to judge the quality of audio power amplifiers. In switchmode power amplifiers various mechanisms influence this performance measure. After giving an overview of those, this paper focuses on the particular effect of the nonlinearity of the output filter components on the audio performance. While the physical reasons for both, the capacitor and the inductor induced distortion are given, the practical in depth demonstration is done for the inductor only. This includes measuring the inductors performance, modeling through fitting and resulting into simulation models. The fitted models achieve distortion values between 0.03 % and 0.2 % as a basis to enable the design of a 200 W amplifier.

M3 - Article in proceedings

SN - 978-0-937803-74-5

SP - 7997

BT - 128th Audio Engineering Society Convention

PB - AES

T2 - 128th Audio Engineering Society Convention

Y2 - 22 May 2010 through 25 May 2010

ER -

Modeling Distortion Effects in Class-D Amplifier Filter Inductors

Abstract

Conference

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