Multi Carrier Modulator for Switch-Mode Audio Power Amplifiers

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Abstract

While switch-mode audio power amplifiers allow compact implementations and high output power levels due to their high power efficiency, they are very well known for creating electromagnetic interference (EMI) with other electronic equipment, in particular radio receivers. Lowering the EMI of switch-mode audio power amplifiers while keeping the performance measures to excellent levels is therefore of high general interest. A modulator utilizing multiple carrier signals to generate a two level pulse train will be shown in this paper. The performance of the modulator will be compared in simulation to existing modulation topologies. The lower EMI as well as the preserved audio performance will be shown in simulation as well as in measurement results on a prototype.
Original languageEnglish
Title of host publication124th Audio Engineering Society Convention
VolumePreprint no. 7439
PublisherAES
Publication date2008
Pages7439
ISBN (Print)9780-937803-62-2
Publication statusPublished - 2008
Event124th Audio Engineering Society Convention - Amsterdam, Netherlands
Duration: 17 May 200820 May 2008
Conference number: 124
http://www.aes.org/events/124/

Conference

Conference124th Audio Engineering Society Convention
Number124
CountryNetherlands
CityAmsterdam
Period17/05/200820/05/2008
Internet address

Cite this

Knott, A., Pfaffinger, G., & Andersen, M. A. E. (2008). Multi Carrier Modulator for Switch-Mode Audio Power Amplifiers. In 124th Audio Engineering Society Convention (Vol. Preprint no. 7439, pp. 7439). AES. http://www.aes.org