PAPER SESSION 2: POWER STAGE TOPOLOGIES AND IMPLEMENTATION



Accurate Characterization of Pulse Timing Errors in Class D Audio Amplifier Output Stages


Francois Koeslag, Toit Mouton
University of Stellenbosch, Western Cape, South Africa


This paper contains a detailed investigation of three sources contributing to pulse timing errors during switching within a half-bridge or full-bridge configuration, i.e., dead time, the switching device’s turn-on and turn-off delays as well as the nonlinear rise and fall switching transitions. The analysis is based on a novel simulation strategy that makes use of Newton’s numerical method. The separate effect of each pulse timing error on harmonic distortion is established, after which a combination model is introduced describing the interaction between these timing errors.


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