Feedback Strategies in Digitally Controlled Class-D Amplifiers

Esslinger R, Gruhler G, Stewart RW. Feedback Strategies in Digitally Controlled Class-D Amplifiers. In: AES Convention 114. Audio Engineering Society; 2003. Paper 5828. Available from: https://aes.org/publications/elibrary-page/?id=12570

@inproceedings{Esslinger2003_12570,
  author = {Esslinger, Rolf and Gruhler, Gerhard and Stewart, R. W.},
  title = {{Feedback Strategies in Digitally Controlled Class-D Amplifiers}},
  booktitle = {AES Convention 114},
  note = {Paper 5828},
  year = {2003},
  month = mar,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=12570}
}

TY  - CPAPER
TI  - Feedback Strategies in Digitally Controlled Class-D Amplifiers
AU  - Esslinger, Rolf
AU  - Gruhler, Gerhard
AU  - Stewart, R. W.
T2  - AES Convention 114
M1  - Paper 5828
PY  - 2003
DA  - 2003/03/06
UR  - https://aes.org/publications/elibrary-page/?id=12570
PB  - Audio Engineering Society
LA  - en
AB  - 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.
ER  -