A circuit for protecting a power amplifier from electrostatic discharge (ESD) that comprises a clamp circuit connected between a first power line and a connection line, and a detecting circuit connected between the connection line and a second power line for detecting whether an ESD event occurs at a conductive pad coupled to the power amplifier and activating the clamp circuit in response to an ESD event, wherein an ESD current due to the ESD event is conducted by the clamp circuit to the first power line.

 
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