Patent ID: 9685780
Date: 2017-06-20
CPC Classifications: H01L,H02H

Claim:
1. An ESD protection circuit, comprising: a clamping unit, coupled between a first power source and a second power source; a driving unit, coupled between the clamping device and a reference node; a resistance unit, coupled between the first power source and the reference node; a switch unit, coupled to the driving unit; and a capacitance unit, coupled between the switch unit and the second power source; wherein the switch unit is coupled between the resistance unit and the capacitance unit, and under a normal operation condition, the driving unit controls the switch unit to be in an un-conducting status, and under an ESD condition, the driving unit controls the switch unit to be in a conducting status; the switch unit is a transmission gate; and the switch unit is coupled between the reference node and the capacitance unit.