High-Order Analog Control of a Clocked Class-D Audio Amplifier with Global Feedback Using Z-Domain Methods

Kemp P, Mouton T, Putzeys B. High-Order Analog Control of a Clocked Class-D Audio Amplifier with Global Feedback Using Z-Domain Methods. In: AES Convention 131. Audio Engineering Society; 2011. Paper 8468. Available from: https://aes.org/publications/elibrary-page/?id=15994

@inproceedings{Kemp2011_15994,
  author = {Kemp, Pieter and Mouton, Toit and Putzeys, Bruno},
  title = {{High-Order Analog Control of a Clocked Class-D Audio Amplifier with Global Feedback Using Z-Domain Methods}},
  booktitle = {AES Convention 131},
  note = {Paper 8468},
  year = {2011},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15994}
}

TY  - CPAPER
TI  - High-Order Analog Control of a Clocked Class-D Audio Amplifier with Global Feedback Using Z-Domain Methods
AU  - Kemp, Pieter
AU  - Mouton, Toit
AU  - Putzeys, Bruno
T2  - AES Convention 131
M1  - Paper 8468
PY  - 2011
DA  - 2011/10/06
UR  - https://aes.org/publications/elibrary-page/?id=15994
PB  - Audio Engineering Society
LA  - en
AB  - The design of a clocked analog controlled pulse-width modulated class-D audio amplifier with global negative feedback is presented. The analog control loop is designed in the z-domain by modeling the comparator as a sampling operation. A method is presented to improve clip recovery and ensure stability during over-modulation. Loop gain is shaped to provide a high gain across the audio band, and ripple compensation is implemented to minimize the negative effect of ripple feedback. Experimental results are presented.
ER  -