ESD CLAMP CONTROL BY DETECTION OF POWER STATE

摘要

The present invention provides an improvement on ESD protection circuitry by controlling the trigger circuit to prevent the unwanted triggering of the device. The circuitry includes an ESD clamp with a trigger circuit coupled to the clamp. Both the clamp and the trigger circuit are coupled to a first reference potential. The circuitry also includes a control line coupled to the trigger circuit. The control line is coupled to a second reference potential to further control the behavior of the trigger circuit such that when the power is supplied to the second reference potential, the control line disables the trigger circuit, and when power is not supplied to the second reference potential, the control line enables the trigger circuit.