Current-Driven Switch-Mode Audio Power Amplifiers

Arnold Knott, Niels Christian Buhl, Michael A. E. Andersen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


The conversion of electrical energy into sound waves by electromechanical transducers is proportional to the current through the coil of the transducer. However virtually all audio power amplifiers provide a controlled voltage through the interface to the transducer. This paper is presenting a switch-mode audio power amplifier not only providing controlled current but also being supplied by current. This results in an output filter size reduction by a factor of 6. The implemented prototype shows decent audio performance with THD + N below 0.1 %.
Original languageEnglish
Title of host publicationProceedings of 132nd AES Convention
Number of pages7
Publication date2012
Publication statusPublished - 2012
EventAES 132nd Convention - Budapest Congress & World Trade Center, Budapest, Hungary
Duration: 26 Apr 201229 Apr 2012


ConferenceAES 132nd Convention
LocationBudapest Congress & World Trade Center
Internet address

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