Abstract
We report a new challenge to IEC protection of high-speed devices caused by current filamentation due to voltage-overshoot effects in forward-biased diodes. While well understood in reverse-biased junctions, filamentation has never been reported in forward-biased junctions, which are often used in high-speed designs such as USB3 and HDMI. An analytical model is presented to estimate the voltage overshoot as a function of rise-time and bias conditions to predict the trade-offs inherent in low-capacitance ESD diodes.
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