Picture of UK Houses of Parliament

Leading national thinking on politics, government & public policy through Open Access research

Strathprints makes available scholarly Open Access content by researchers in the School of Government & Public Policy, based within the Faculty of Humanities & Social Sciences.

Research here is 1st in Scotland for research intensity and spans a wide range of domains. The Department of Politics demonstrates expertise in understanding parties, elections and public opinion, with additional emphases on political economy, institutions and international relations. This international angle is reflected in the European Policies Research Centre (EPRC) which conducts comparative research on public policy. Meanwhile, the Centre for Energy Policy provides independent expertise on energy, working across multidisciplinary groups to shape policy for a low carbon economy.

Explore the Open Access research of the School of Government & Public Policy. Or explore all of Strathclyde's Open Access research...

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.

Full text not available in this repository.Request a copy from the Strathclyde author

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.