Simple, Ultralow Distortion Digital Pulse Width Modulator

Putzeys B. Simple, Ultralow Distortion Digital Pulse Width Modulator. In: AES Convention 120. Audio Engineering Society; 2006. Paper 6694. Available from: https://aes.org/publications/elibrary-page/?id=13498

@inproceedings{Putzeys2006_13498,
  author = {Putzeys, Bruno},
  title = {{Simple, Ultralow Distortion Digital Pulse Width Modulator}},
  booktitle = {AES Convention 120},
  note = {Paper 6694},
  year = {2006},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13498}
}

TY  - CPAPER
TI  - Simple, Ultralow Distortion Digital Pulse Width Modulator
AU  - Putzeys, Bruno
T2  - AES Convention 120
M1  - Paper 6694
PY  - 2006
DA  - 2006/05/06
UR  - https://aes.org/publications/elibrary-page/?id=13498
PB  - Audio Engineering Society
LA  - en
AB  - A core problem with digital Pulse Width Modulators is that effective sampling occurs at signal-dependent intervals, falsifying the z-transform on which the input signal and the noise shaping process are based. In a first step the noise shaper is reformulated to operate at the timer clock rate instead of the pulse repetition frequency. This solves the uniform/natural sampling problem, but gives rise to new non-linearities akin to ripple feedback in analogue modulators. By modifying the feedback signal such that it reflects only the modulated edge of the pulse train this effect is practically eliminated, yielding vastly reduced distortion without increasing complexity.
ER  -