TRANSIENT-TRIGGERED DC VOLTAGE-SUSTAINED POWER-RAIL ESD CLAMP CIRCUIT

摘要

A transient-triggered DC voltage-sustained power-rail ESD clamp circuit comprises: a transient-triggered module, a DC voltage-triggered module and a discharge device, wherein the transient-triggered module is connected with the DC voltage-triggered module and the discharge device respectively. When an ESD event is approaching, the ESD protection circuit can be turned on well and quickly, and can effectively avoid the problems of erroneous triggering and latching-up caused by quick power-on and high-frequency noise at the same time.

主权项

1. A transient-triggered DC voltage-sustained power-rail ESD clamp circuit, comprising a transient-triggered module, a DC voltage-triggered module and a discharge device;
the transient-triggered module is connected with the discharge device, and used for judging whether a obtained pulse meets transient judgement condition of an ESD event according to rise time of the pulse, and if so, then a first response signal is sent to the discharge device, and the first response signal is used for turning on the discharge device; the DC voltage-triggered module is connected with the transient-triggered module, and used for judging whether the pulse meets DC voltage judgement condition of the ESD event according to amplitude of the pulse, and if so, then a second response signal is sent to the transient-triggered module, and the transient-triggered module controls the discharge device to keep in a turn-on state according to the second response signal; the discharge device is used for discharging static charges brought by the pulse.