Increasing Precision of Impedance Measurements for ESD Protection's Frequency Models

Abstract

Achieving system level ESD robustness by simulation required the use of precise models that should take into account the triggering behavior of the protections. This article upgrades articles dealing with frequency measurement methods to get the equivalent impedance of ESD protections exposed to strong pulses (Escudié et al., 2022, Ruffat et al., 2022, Caignet et al., 2022). In this article, a two-port transmission measurement is used to increase the accuracy of measurement for very low or high impedance values of this type of protections. The pros and cons of one-port versus two-port measurements are presented, showing how the precision is increased. Some experimental results on commercial transient voltage suppressor are proposed and discussed. To conclude this article, different models also built from frequency measurements are introduced and compared.