Title :
Linearization of class D output stages for high-performance audio power amplifiers
Author :
Logan, S. ; Hawksford, M.O.J.
Author_Institution :
Essex Univ., Colchester, UK
Abstract :
A system is described which uses a quantized feedback technique to reduce the distortion generated by a class D PWM amplifier, thus making it more suitable for use in a high-performance audio system. The technique is applicable to digital PWM and applies local error correction in a noise shaping loop to reduce output-stage distortion and thus achieve a performance closer to that defined by the digitally defined PWM code
Keywords :
Hi-Fi equipment; audio-frequency amplifiers; digital-analogue conversion; electric distortion; error correction; feedback amplifiers; power amplifiers; pulse width modulation; quantisation (signal); PWM amplifier; audio power amplifiers; class D output stages; digital PWM; distortion reduction; linearization; local error correction; noise shaping loop; output-stage distortion; quantized feedback technique;
Conference_Titel :
Advanced A-D and D-A Conversion Techniques and their Applications, 1994. Second International Conference on
Conference_Location :
Cambridge
Print_ISBN :
0-85296-617-2
DOI :
10.1049/cp:19940556
