TY - GEN
T1 - Feed-Back Active Control for Half-Bridge Class-D audio amplifiers
AU - Sala, V. M.
AU - Cusidó, J.
AU - Delgado, M.
AU - Ruiz, G.
AU - Ortega, J. A.
PY - 2008
Y1 - 2008
N2 - 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 Feed-Back Active Control (FBAC) is implemented. The FBAC 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 FBAC implemented control. Results show a clear reduction of generated distortion, which allows incremented audio amplifier efficiency.
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 Feed-Back Active Control (FBAC) is implemented. The FBAC 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 FBAC implemented control. Results show a clear reduction of generated distortion, which allows incremented audio amplifier efficiency.
UR - https://www.scopus.com/pages/publications/57849107317
U2 - 10.1109/ISIE.2008.4677214
DO - 10.1109/ISIE.2008.4677214
M3 - Conference contribution
AN - SCOPUS:57849107317
SN - 1424416655
SN - 9781424416653
T3 - IEEE International Symposium on Industrial Electronics
SP - 369
EP - 373
BT - 2008 IEEE International Symposium on Industrial Electronics, ISIE 2008
T2 - 2008 IEEE International Symposium on Industrial Electronics, ISIE 2008
Y2 - 30 June 2008 through 2 July 2008
ER -