A Power Efficient Audio Amplifier Combining Switching and Linear Techniques

Zee van der, R.A.R. and Tuijl van, A.J.M. (1998) A Power Efficient Audio Amplifier Combining Switching and Linear Techniques. In: 24th European Solid-State Circuits Conference, ESSCIRC 1998, Sept. 22-24, 1998, The Hague The Netherlands.

Preview

PDF
394Kb

Abstract:	Integrated Class D audio amplifiers are very power efficient, but require an external filter which prevents further integration. Also due to this filter, large feedback factors are hard to realise, so that the load influences the distortion- and transfer characteristics. The amplifier presented in this paper consists of a switching part that contains a much simpler filter, and a linear part that ensures a low distortion and flat frequency response. A 30W version was realised. The switching part of the amplifier was integrated in a BCD process. Together with a linear part and with a loudspeaker as load, it has a flat frequency response +/- 0.3dB, a dissipation that is up to 5 times lower than a traditional class AB audio amplifier, and a distortion of <0.02% over power and frequency range.
Item Type:	Conference or Workshop Item
Copyright:	©1998 IEEE
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Integrated Circuit Design (ICD)
Link to this item:	http://purl.utwente.nl/publications/15956
Export this item as:	BibTeX EndNote HTML Citation Reference Manager

Show download statistics for this publication

Repository Staff Only: item control page

Metis ID: 112838