Patent ID: 7012307

Claim:
An electrostatic discharge protection circuit coupled between a first node and a second node, comprising: a substrate of a first conductivity type; a first doped region and a second doped region of a second conductivity type formed in the substrate, the first doped region and the second doped region being spaced apart enabling a channel region formed in between; a well region of the second conductivity type, formed in the substrate; and a fourth doped region and a fifth doped region of the second conductivity type formed in the well region, the fourth doped region coupled to the first node; and a third doped region of the first conductivity type disposed within the well region, wherein the third doped region is electrically floated and is spaced apart from the fourth doped region, the first node is electrically coupled to the first doped region through the fourth doped region, the well region, and the fifth doped region, and the second node is electrically coupled to the second doped region.