Quasi-analytical spectrum of PWM signals with dead-time for multiple sinusoidal input

The analytical spectrum of pulse width modulated (PWM) signals with dead-time is derived in this paper. Previous results were based on the double Fourier series expansion and therefore they are only valid for a single tone modulating signal. In this work analytical expressions for finite bandwidth input signals are presented. Some simplifying assumptions are considered to derive manageable expressions; however, extensions to more general cases are straightforward. Theoretical results are compared with computer simulations.