SDM Versus PWM Power Dgital-to-Analogue Converters (PDAC) in High-resolution Digital Audio Applications

Hawksford MJ. SDM Versus PWM Power Dgital-to-Analogue Converters (PDAC) in High-resolution Digital Audio Applications. In: AES Convention 118. Audio Engineering Society; 2005. Paper 6471. Available from: https://aes.org/publications/elibrary-page/?id=13187

@inproceedings{Hawksford2005_13187,
  author = {Hawksford, Malcolm J.},
  title = {{SDM Versus PWM Power Dgital-to-Analogue Converters (PDAC) in High-resolution Digital Audio Applications}},
  booktitle = {AES Convention 118},
  note = {Paper 6471},
  year = {2005},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13187}
}

TY  - CPAPER
TI  - SDM Versus PWM Power Dgital-to-Analogue Converters (PDAC) in High-resolution Digital Audio Applications
AU  - Hawksford, Malcolm J.
T2  - AES Convention 118
M1  - Paper 6471
PY  - 2005
DA  - 2005/05/06
UR  - https://aes.org/publications/elibrary-page/?id=13187
PB  - Audio Engineering Society
LA  - en
AB  - Sigma-delta modulation (SDM) and pulse-width modulation (PWM) are compared as a means of structuring power digital-to-analogue converters (PDAC) designed specifically for wide-band audio, low power loss and direct loudspeaker dive. Recent innovations in SDM coding and output-stage topologies using pulse shaping techniques are discussed with emphasis on achieving stable and low distortion operation especially under high-level signal excitation having a modulation index circa 0.7 necessary to process peak transients. A simplified variant of predictive SDM with step back is introduced that offers both low latency and probability of instability and structures for both analogue and digital input data reviewed.
ER  -