Active Control Based on an Estimator for the Bus-Pumping Cancellation in the Half-Bridge Class-D Audio Power Amplifiers

Sala V, Romeral L. Active Control Based on an Estimator for the Bus-Pumping Cancellation in the Half-Bridge Class-D Audio Power Amplifiers. In: AES Convention 127. Audio Engineering Society; 2009.pp. 7838:1-. Available from: https://aes.org/publications/elibrary-page/?id=15033

@inproceedings{Sala2009_15033,
  author = {Sala, Vicent and Romeral, Luis},
  title = {{Active Control Based on an Estimator for the Bus-Pumping Cancellation in the Half-Bridge Class-D Audio Power Amplifiers}},
  booktitle = {AES Convention 127},
  pages = {7838:1-},
  year = {2009},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15033}
}

TY  - CPAPER
TI  - Active Control Based on an Estimator for the Bus-Pumping Cancellation in the Half-Bridge Class-D Audio Power Amplifiers
AU  - Sala, Vicent
AU  - Romeral, Luis
T2  - AES Convention 127
SP  - 1
M1  - Paper 7838
PY  - 2009
DA  - 2009/10/06
UR  - https://aes.org/publications/elibrary-page/?id=15033
PB  - Audio Engineering Society
LA  - en
AB  - In this paper is presented a new technique to avoid the distortion generated due to mid point voltage variations on DC-Bus of Class-D Half Bridge audio amplifiers. An usual distortion source on Class-D amplifier is the Bus-Pumping effect. Bus-Pumping causes characteristic distortion and introduces attenuation on output gain. Due to this effect the amplifier efficiency decreases. By including distortion factors on the Half-Bridge amplifier model a new Hybrid Active Control (HAC) is implemented. The HAC minimizes distortion due to mid point DC-Bus voltage variations. Simulation and experimental results confirm the theoretical approach of parameter influence on Bus-Pumping, and the effectiveness of HAC implemented control. Results show a clear reduction of generated distortion, which allows incremented audio amplifier efficiency.
ER  -