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A tunable PNP-based ESD clamp is designed for a 4.5V power IO in a foundry technology. Using Mixed-Mode TCAD simulations, we show that the clamp's trigger and holding voltage can be easily tuned by simple layout modifications. The fabricated clamp was characterized using an on-wafer TLP system, confirming the tunable Vt1=13.4−16.8V, with Vhold slightly above 10V and It2>1.2A. Finally, the clamp...
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