Dynamic Dithering of Delta-Sigma Modulators

Norsworthy SR. Dynamic Dithering of Delta-Sigma Modulators. In: AES Convention 99. Audio Engineering Society; 1995. Paper 4103. Available from: https://aes.org/publications/elibrary-page/?id=7663

@inproceedings{Norsworthy1995_7663,
  author = {Norsworthy, Steven R.},
  title = {{Dynamic Dithering of Delta-Sigma Modulators}},
  booktitle = {AES Convention 99},
  note = {Paper 4103},
  year = {1995},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=7663}
}

TY  - CPAPER
TI  - Dynamic Dithering of Delta-Sigma Modulators
AU  - Norsworthy, Steven R.
T2  - AES Convention 99
M1  - Paper 4103
PY  - 1995
DA  - 1995/10/06
UR  - https://aes.org/publications/elibrary-page/?id=7663
PB  - Audio Engineering Society
LA  - en
AB  - The author has previously demonstrated the concept of noise-shaped dithering to a delta-sigma modulator. While such dithering successfully whitens the noise floor of the modulator, it is not without its faults. It will diminish the usable dynamic range by several decibels for large-magnitude inputs near full scale. For higher-order, single-stage modulators, it will also cause the threshold of instability to occur a few decibels sooner. These problems are ameliorated with dynamic noise-shaped dithering. This entails modulating the dither with a nonlinear function of the input signal in a manner that produces no additional distortion and is perceptually inaudible. This enables virtually all of the potential dynamic range and stability to be realized from the modulator while still whitening the quantization noise.
ER  -