Design of on-chip power-rail ESD clamp circuit with ultra-small capacitance to detect ESD transition

A power-rail ESD clamp circuit with a new proposed ESD-transient detection circuit which adopts a ultra small capacitor to achieve the required functions has been presented and substantiated to own a long turn-on duration and high turn-on efficiency. In addition, the power-rail ESD clamp circuits with the new proposed ESD-transient detection circuit also presented an excellent immunity against the mis-trigger and the latch-on event under the fast power-on condition.