Patent ID: 8169761

Claim:
A Electrostatic Discharge (ESD) clamp circuit, applied to a power amplifier, comprising: a first line, coupled to an output terminal of the power amplifier; a second line; a first circuit, having a first terminal coupled to the first line, and a second terminal; a second circuit, having a first terminal coupled to the second terminal of the first circuit, and a second terminal; an ESD detecting unit, having a first detection terminal coupled to the second terminal of the first circuit, and a second detection terminal coupled to the second line, and an output terminal; a buffer unit, having a first power terminal coupled to the second terminal of the second circuit, a second power terminal coupled to the second line, an output terminal, and an input terminal coupled to the output terminal of the ESD detecting unit; and an ESD clamp unit, having a control terminal coupled to the output terminal of the buffer unit, a first terminal directly connected to the first line, and a second terminal coupled to the second line.