Recent trends in the automotive audio industry have shown the importance of active noise cancelation (ANC) for major improvements in mobile entertainment environments. These approaches target the acoustical noise in the cabin and superimpose an inverse noise signal to cancel disturbances. Electromagnetic interference between switch-mode audio power amplifiers and receivers show the same physical obstacle as the described ANC endeavors are targeting. The principle of active electromagnetic interference cancelation (AEC) is derived in this paper on a theoretical basis with verifications in simulation and experiment. The resulting switch-mode audio power amplifier of this experiment keeps its high efficiency and is able to deliver the signal with less than 0.1 % distortion, while improving the source of electromagnetic interference by 15 dB.
|Title of host publication||The Proceedings of the AES 36th International Conference : Automotive Audio - Sound in Motion|
|Publication status||Published - 2009|
|Event||AES 36th International Conference: Automotive Audio - Sound in Motion - Dearborn, MI, United States|
Duration: 2 Jun 2009 → 4 Jun 2009
Conference number: 36
|Conference||AES 36th International Conference|
|Period||02/06/2009 → 04/06/2009|