Patent 7397642 was granted and assigned to Silicon Integrated Systems on July, 2008 by the United States Patent and Trademark Office.
An ESD protection circuit is disclosed. The ESD protection circuit includes a stacked MOS circuit, and a trigger current generator. The object of the stacked MOS circuit is to be the first releasing path of the ESD current; the object of the trigger current generator is to generate the trigger current to turn on the stacked MOS circuit, and then the stacked MOS circuit would be the first releasing path of the ESD current.