VDDCORE to VSS ESD clamp made of core device

摘要

The present invention comprises an ESD clamp circuit used in an integrated circuit with plural power supply. The ESD clamp circuit, connected between core voltage source and low voltage source, is fabricated by a process which fabricates core circuit. The ESD clamp circuit has a low trigger voltage, so it can conduct large current to protect the core circuit before the core circuit is damaged.