Patent ID: 8339757

Claim:
An ESD protection circuit with multiple domains, wherein the ESD protection circuit comprises: a first ESD protection device coupled between a first power supplying line and a first ground line; a first internal circuit, having a first terminal coupled to the first power supplying line; a first switch, coupled between a second terminal of the first internal circuit and a second ground line, wherein the second ground line is different from the first ground line, a first ESD detection circuit, coupled between a second power supplying line and the second ground line, coupled to the first switch, for detecting an ESD signal, and controls the first switch to be non-conductive when the ESD signal occurs, wherein the second power supplying line is different from the first power supplying line, a second internal circuit, coupled between the second power supplying line and the first ground line; and a second ESD protection device, coupled between the second power supplying line and the second ground line.