Accurate prediction of EMI-induced rectification effects in nonlinear analog circuits using behavioral modeling

The effects of Electromagnetic Interference (EMI) on the DC quiescent point of a circuit require expensive transient simulations due the settling of large time constants of the circuit combined with high frequency interference signals. This paper applies behavioral modeling to accurately predict EMI-induced rectification on a wide range of analog circuits. Analytical models are derived for predicting the DC voltage shifts, introduced by the interaction with EMI, over a large range of amplitudes and frequencies. The proposed methodology can be applied to numerous analog circuits that need exhaustive EM susceptibility verification using a minimal amount of measurements to extract the model parameters. The approach is validated on some basic analog building blocks.