Circuit models for ESD-generator-cable field coupling configurations based on measurement data

Accurate and flexible modeling of field coupling from ESD sources to cables or PCB traces (indirect ESD) is important for immunity estimations. Accurate circuit models can be obtained by applying approximations techniques to measurement data in frequency domain. In this paper an accurate ESD generator model is extended to model ESD coupling behavior for the ESD generator to a cable setup. The new model can be used for simulation of arbitrary load conditions, for both direct and indirect discharge. The model represents the individual characteristics of an ESD generator without applying complex 3D field simulation. It allows computation of the coupled voltages over linear or nonlinear termination using a circuit simulator.