High power digital audio amplifier (output stage)

Frioni, Victor (1999). High power digital audio amplifier (output stage) Honours Thesis, School of Computer Science and Electrical Engineering, The University of Queensland.

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Author Frioni, Victor
Thesis Title High power digital audio amplifier (output stage)
School, Centre or Institute School of Computer Science and Electrical Engineering
Institution The University of Queensland
Publication date 1999
Thesis type Honours Thesis
Supervisor Geoff Walker
Total pages 61
Language eng
Subjects 0906 Electrical and Electronic Engineering
Formatted abstract

This thesis presents the output stage for a true digital audio amplifier. A digital amplifier performs amplification of the signal directly from the CD. This offers the advantage of the entire input chain remaining in the digital domain, and reducing the production of noise. To show this concept working, a digitally produced PWM signal of a sine wave has been used to test the output stage constructed in this thesis. The output stage was designed using a full-bridge set of n-channel high power MOSFETs. A pulse referenced error correction (PEDEC) feedback network has been introduced that offers a simple solution to removing the inevitable errors introduced by the power stage. An output stage was built without feedback and tested. Results show the potential for high efficiency, but to realise high fidelity a feedback network will need to be deployed. Current technology and concepts exist that will allow the construction of a commercially viable digital audio amplifier in the near future.

Keyword Digital audio amplifier
Additional Notes * 4th year electrical engineering theses and information technology abstracts. 1999

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
Citation counts: Google Scholar Search Google Scholar
Created: Tue, 21 May 2013, 12:07:55 EST by Mr Yun Xiao on behalf of Scholarly Communication and Digitisation Service