Comparative analysis of the impedances of key radio engineering devices with PWM based on a linear model and a closed loop method

The problem of comparative analysis of the impedances of switching mode devices with negative feedback by two methods is considered. The use of a linear injection model is justified, on the basis of which analytical expressions of impedances in Laplace form are obtained. The results of numerical modeling and spectral analysis of processes in a closed dynamic system with PWM are presented, confirming the correctness of the analytical model in the frequency range not exceeding half the clock frequency.