Distortions by Switching Errors in Digital Power Amplifiers Using Sigma Delta Coded Signals

Esslinger R, Gruhler G, Stewart RW. Distortions by Switching Errors in Digital Power Amplifiers Using Sigma Delta Coded Signals. In: AES Convention 112. Audio Engineering Society; 2002. Paper 5633. Available from: https://aes.org/publications/elibrary-page/?id=11429

@inproceedings{Esslinger2002_11429,
  author = {Esslinger, Rolf and Gruhler, Gerhard and Stewart, Robert W.},
  title = {{Distortions by Switching Errors in Digital Power Amplifiers Using Sigma Delta Coded Signals}},
  booktitle = {AES Convention 112},
  note = {Paper 5633},
  year = {2002},
  month = apr,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=11429}
}

TY  - CPAPER
TI  - Distortions by Switching Errors in Digital Power Amplifiers Using Sigma Delta Coded Signals
AU  - Esslinger, Rolf
AU  - Gruhler, Gerhard
AU  - Stewart, Robert W.
T2  - AES Convention 112
M1  - Paper 5633
PY  - 2002
DA  - 2002/04/06
UR  - https://aes.org/publications/elibrary-page/?id=11429
PB  - Audio Engineering Society
LA  - en
AB  - The development of a fully digital audio power amplifier based on PWM or Sigma Delta technologies still has many unsolved practical problems. The most problematic part of the amplifier system is the switching (class-D) power stage. It is extremely difficult to turn on or off the high power voltage impulses as required for a high performance signal quality (e.g. 16 bit CD quality). In this paper the typical switching errors introduced by the power transistors, the power supply voltage and the load will be analysed formally and with computer simulations. From the results it can be seen, that a degrading of the Signal-to-Noise quality by harmonic distortions and unwanted modulation products occur by the signal errors in the output stage.
ER  -