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V. Sala, and L. Romeral, "Active Control Based on an Estimator for the Bus-Pumping Cancellation in the Half-Bridge Class-D Audio Power Amplifiers," Paper 7838, (2009 October.). doi: V. Sala, and L. Romeral, "Active Control Based on an Estimator for the Bus-Pumping Cancellation in the Half-Bridge Class-D Audio Power Amplifiers," Paper 7838, (2009 October.). doi:
Abstract: 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.

@article{sala2009active,
author={sala, vicent and romeral, luis},
journal={journal of the audio engineering society},
title={active control based on an estimator for the bus-pumping cancellation in the half-bridge class-d audio power amplifiers},
year={2009},
volume={},
number={},
pages={},
doi={},
month={october},} @article{sala2009active,
author={sala, vicent and romeral, luis},
journal={journal of the audio engineering society},
title={active control based on an estimator for the bus-pumping cancellation in the half-bridge class-d audio power amplifiers},
year={2009},
volume={},
number={},
pages={},
doi={},
month={october},
abstract={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.},}

TY - paper
TI - Active Control Based on an Estimator for the Bus-Pumping Cancellation in the Half-Bridge Class-D Audio Power Amplifiers
SP - EP -
AU - Sala, Vicent
AU - Romeral, Luis
PY - 2009
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2009 TY - paper
TI - Active Control Based on an Estimator for the Bus-Pumping Cancellation in the Half-Bridge Class-D Audio Power Amplifiers
SP - EP -
AU - Sala, Vicent
AU - Romeral, Luis
PY - 2009
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2009
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.