Dual-Band PWM for Filterless Class-D Audio Amplification

Kaleris K, Papadakos C, Mourjopoulos J. Dual-Band PWM for Filterless Class-D Audio Amplification. In: AES Convention 144. Audio Engineering Society; 2018. Paper 9937. Available from: https://aes.org/publications/elibrary-page/?id=19454

@inproceedings{Kaleris2018_19454,
  author = {Kaleris, Konstantinos and Papadakos, Charalampos and Mourjopoulos, John},
  title = {{Dual-Band PWM for Filterless Class-D Audio Amplification}},
  booktitle = {AES Convention 144},
  note = {Paper 9937},
  year = {2018},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=19454}
}

TY  - CPAPER
TI  - Dual-Band PWM for Filterless Class-D Audio Amplification
AU  - Kaleris, Konstantinos
AU  - Papadakos, Charalampos
AU  - Mourjopoulos, John
T2  - AES Convention 144
M1  - Paper 9937
PY  - 2018
DA  - 2018/05/06
UR  - https://aes.org/publications/elibrary-page/?id=19454
PB  - Audio Engineering Society
LA  - en
AB  - The benefits of Dual-Band Pulse Width Modulation (DBPWM) are demonstrated for filter-less audio class-D amplifier implementations. DBPWM is evaluated in terms of energy efficiency (thermal loading) and reproduction fidelity for direct driving of loudspeaker units by DBPWM signals. Detailed physical models of low-frequency (woofer) and high-frequency (tweeter) loudspeakers are employed for simulation of the coupling between the DBPWM signal and the electro-mechanical and acoustic properties of loudspeaker systems in the broadband PWM spectral range. Derived frequency responses are used to estimate the reproduced sound signal of the loudspeaker. Equivalent impedance of the speaker's voice coil is used to estimate thermal loading by the DBPWM signal's out-of-band spectral energy, comparing standard filtered PWM implementations to the proposed method.
ER  -