27th International AES Conference
Program Papers by session


Program


Friday, September 2

10.00-12.30

REGISTRATION

14.00-14.10

OPENING CEREMONY

Conference Chair Jan Abildgaard Pedersen

14.10-14.50

KEYNOTE ADDRESS. EFFICIENT AUDIO POWER AMPLIFICATION CHALLENGES.

Michael A. E. Andersen, 27th Conference Papers Chair

For more than a decade efficient audio power amplification has evolved and today switch-mode audio power amplification in various forms are the state-of-the-art. The technical steps that lead to this evolution are described and in addition many of the challenges still to be faced and where extensive research and development are needed is covered.
15.00-16.00

PAPER SESSION 1

The Industrial Dynamics of Open Innovation: Evidence from the Transformation of Sound Amplification from Linear Solid-State to Class D Technology[Invited paper]

Jens Frøslev Christensen, Michael Holm Olesen, Jonas Sorth Kjær. Copenhagen Business School, Frederiksberg, Denmark.

16.30-18.00

PAPER SESSION 2: POWER STAGE TOPOLOGIES

A 97 Percent Efficiency Power Stage Design for High Performance Class D Audio Amplification

René Lambruschi, Nicola Lomuto, Frédérik Dezé. CL3, Pontoise, France.

Digital Audio Power Amplifier Based on Multilevel Power Converters

Victor M. E. Antunes(1), Vitor Fernao Pires(2), Jose Fernando Silva(3). (1) Instituto Politécnico de Setúbal, Portugal. (2) Instituto Superior Técnico (IST), UTL, Lisbon, Portugal. (3) Centro Automática Universidade Técnica Lisboa (CAUTL), Lisbon, Portugal.

Self-Oscillating Modulators for Direct Energy Conversion Audio Power Amplifiers

Petar Ljusev, Michael A. E. Andersen. Technical University of Denmark, Lyngby, Denmark.

20.30-21.30

TABLE-TOP DEMONSTRATIONS

Technology demonstrations by participants/inventors. Space for table-top demonstrations is free of charge and demo rooms are available at a cost of DKK 5000(Sponsors DKK 2500) for the duration of the conference. Both space for table-top demonstrations and demo rooms must be reserved in advance. For reservations please contact the secretariat.

Saturday, September 3

10.00-12.00

PAPER SESSION 3: MODULATION AND CONTROL

Due to unforeseen circumstances, Skip Taylor is unable to attend the conference.

Real-Time Power Supply Feedback Reduces Power Conversion Requirements for Digital Class D Amplifiers

Randy Boudreaux. Cirrus Logic, Inc., Austin, TX, USA.

Distortion and Error Reduction in a Class D Power Stage Using Feedback

Michael Pate(1), Lars Risbo(2), Pietro Andreani(3), Kwong Chao(1). (1) Texas Tech University, Lubbock, TX, USA. (2) Texas Instruments, Lyngby, Denmark. (3) Technical University of Denmark, Lyngby, Denmark.

Derivation and Analysis of a Low-Cost, High- Performance Analog BPCM Control Scheme for Class D Audio Power Amplifiers

Mikkel C. W. Høyerby, Michael A. E. Andersen. Technical University of Denmark, Lyngby, Denmark.

Discrete-Time Modeling of Continuous-Time Pulse Width Modulator Loops

Lars Risbo. Texas Instruments Denmark, Lyngby, Denmark.

13.30-14:30

PAPER SESSION 4: ERRORS AND DISTORTION

Due to unforeseen circumstances, Brian Attwood is unable to attend the conference.

Harmonic Distortion Reduction with Output Capacitance in PWM Inverters

Gael Pillonnet(1,2), Nacer Abouchi(1), Philippe Marguery(2). (1) CPE Lyon, Lyon, France. (2) ST Microelectronics, Grenoble, France.

Time Domain Analysis of Open Loop Distortion in Class D Amplifier Output Stages

Flemming Nyboe(1,2), Lars Risbo(1), Pietro Andreant(2). (1) Texas Instruments, Lyngby, Denmark. (2) Technical University of Denmark, Lyngby, Denmark.

14.30-16.00

PAPER SESSION 5: IC AND INTEGRATION

An Integrated 40-W Analog Input Class D Amplifier with Improved Clipping Recovery and Reduced Turn-on Transients

Ronnie Bean, Ryan Lind. Texas Instruments, Ridgeland, MS, USA.

Commercializing Class D Amplifier Technologies

Paul Mathews, Philip R. Jeffs. Rane Corporation, Mukilteo, WA, USA.

A High Performance 8x150-W Digital Audio System

Kim Nordtorp Madsen, Thomas Morch, Lars Risbo. Texas Instruments Denmark A/S, Copenhagen, Denmark.

16.30-19.00

SOCIAL EVENT-EXCURSION

Guided Tour of Frederiksborg Castle – Busses leave at 16.45
20.00-22.00

BANQUET

To be defined

Sunday, September 4

09.00-10:30

PAPER SESSION 6: MEASUREMENTS AND TESTS

Measuring Distortion in Switching Amplifiers

Bruce Hofer. Audio Precision, Inc., Beaverton, OR, USA.

Comparison Between Different IDDQ Measurement Techniques on Class D Audio Amplifiers

Victor- Hugo Lopez de Nava. Texas Instruments, Dallas, TX, USA.

Click and Pop Measuring Technique

Tomas Bruunshuus Sørensen. Texas Instruments Denmark A/S, Copenhagen, Denmark.

11.00-13.00

MEASUREMENT AND INSTRUMENTATION WORKSHOP

AudioPrecision: Rene MørchTitle: "Measuring Switching Amplifiers".
AudioGraph: Lars OhlenTitle: "A stability test system for audio power amplifiers".
ICEPower: Kristian LundTitle: "Towards Filterless Topologies".
TI: Thomas MørchTitle: "Modular test platforms for IC developement"
20min. each and 40 min. discussion.
14.00-15.30

EMI/EMC TUTORIAL AND WORKSHOP

Delta: Specialist Viggo Brøndegaard NielsenTitle: "Introduction to EMC".
Pulsus: 'President and CEO' John OhTitle: "Tutorial session on practical application of full digital amplifier solution for multi-channel and hi-fi audio systems".
ICEPower: Lars PetersenTitle: "Audio SMPS topologies & EMC"
20min. each and 40 min. discussion.



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