System Level ESD Coupling Analysis Using Coupling Transfer Impedance Function

Abstract

This paper proposes a novel way for the estimation of the system level electrostatic discharge (ESD) coupling using the frequency-domain measurements. ABCD parameters are calculated from the measured (simulated) S-parameters of the equipment under test (EUT). The transfer function of the system level ESD coupling is derived from the ABCD-parameters. The derived transfer function estimates the induced coupling to the EUT quite well for the input ESD stressing. For the ESD source modeling, a novel simple and efficient circuit model of ESD generator is also presented. A good agreement is obtained between the measured and simulated results based on derived coupling transfer impedance function. The proposed method permits the efficient ESD coupling analysis without the need of additional electromagnetic modeling of EUT and ESD generator for various ESD input voltage levels.