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Feedback strategies in digitally controlled class-D amplifiers

Esslinger, R. and Gruhler, G. and Stewart, R.W. (2003) Feedback strategies in digitally controlled class-D amplifiers. In: 2003 AES Convention 114, 2003-03-01.

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Abstract

A fundamental problem in digitally controlled class-D power amplifiers is the distortion of the amplified pulse signal by imperfections of the power transistors and the analogue output circuitry. The only way to overcome this is to provide error correction by feedback. With a pulse-modulated signal (either PWM or Sigma-Delta-Modulation) this correction can be performed by changing the pulse edge timing, as it is done in some existing solutions. If error correction during the pulse generation inside of the digital system is desired, an Analogue- to Digital converter is needed. In this paper the most important solutions done so far are reviewed and further ideas based on feedback into the digital system are introduced.

Item type: Conference or Workshop Item (Paper)
ID code: 39202
Keywords: feedback strategies, digitally controlled, class-d amplifiers, Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
Depositing user: Pure Administrator
Date Deposited: 17 Apr 2012 14:19
Last modified: 17 Jul 2013 15:12
URI: http://strathprints.strath.ac.uk/id/eprint/39202

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