Zhenhua Shao and Richard Abbott
Frequency response, state space modelling, singular perturbation,switching power supply, Bode plot, analog filter
The measured performance of analog circuits is at some level im- pacted by a broad array of unintended real-world parameters in the form of: printed circuit board parasitic, component value variations, and non-idealities associated with cabling and connectors. Simulation of these types of systems can rapidly become computationally intractable when more variables are considered. In this paper, analytic methods are developed and compared to measured data in order to predict the impact of parasitic on the performance of a switching power supply output filter. The filter is first described using state space methods, and then converted to a standard linear singularly perturbed system for the inclusion of parasitic parameters. The techniques presented in this paper are readily scalable to more complicated electronic circuits yielding computationally compact methods to accurately predict system performance.
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