A Digital Class D Audio Amplifier with Pulse Density Modulation and Distortion Suppression Feedback Loop

McKenzie R, Li X, Snelgrove M, Ng WT. A Digital Class D Audio Amplifier with Pulse Density Modulation and Distortion Suppression Feedback Loop. In: AES Convention 143. Audio Engineering Society; 2017.pp. 9859:1-6. Available from: https://aes.org/publications/elibrary-page/?id=19256

@inproceedings{McKenzie2017_19256,
  author = {McKenzie, Robert and Li, Xinchang and Snelgrove, Martin and Ng, Wai Tung},
  title = {{A Digital Class D Audio Amplifier with Pulse Density Modulation and Distortion Suppression Feedback Loop}},
  booktitle = {AES Convention 143},
  pages = {9859:1-6},
  url = {https://aes.org/publications/elibrary-page/?id=19256},
  year = {2017},
  month = oct,
  publisher = {Audio Engineering Society}
}

TY  - CPAPER
TI  - A Digital Class D Audio Amplifier with Pulse Density Modulation and Distortion Suppression Feedback Loop
AU  - McKenzie, Robert
AU  - Li, Xinchang
AU  - Snelgrove, Martin
AU  - Ng, Wai Tung
T2  - AES Convention 143
SP  - 1
EP  - 6
M1  - Paper 9859
PY  - 2017
DA  - 2017/10/06
UR  - https://aes.org/publications/elibrary-page/?id=19256
PB  - Audio Engineering Society
LA  - en
AB  - A novel fully digital Class D amplifier is presented in which the output stage error is digitized by a 10-bit ADC and fed back into the modulation path to suppress distortion. This technique attenuates the in-band noise introduced by the output stage, and can tolerate large latency. A fully digital Pulse Density Modulation (PDM) Class D amplifier with output stage noise shaping is implemented on a PCB prototype. Feedback loop functionality is verified experimentally, and a 10 dB improvement in Total Harmonic Distortion plus Noise (THD+N) is realized.
ER  -