Patent ID: 7405915
Filing Date: 2008-07-29
Classification: H01L

Abstract:
1. An electrostatic discharge protection circuit for use in a semiconductor device, comprising: an electrostatic signal discharge unit for discharging an electrostatic signal, the electrostatic signal discharge unit including a first NMOS transistor receiving an electrostatic detection voltage through its gate; a first electrostatic detection voltage supplying unit for generating the electrostatic detection voltage in response to an alternating current component of the electrostatic signal; a driving unit for generating a driving voltage in response to the electrostatic detection voltage in order to drive the electrostatic signal discharge unit; and a second electrostatic detection voltage supplying unit enabled in response to the driving voltage for continuously supplying the electrostatic detection voltage to the driving unit in response to a direct current component of the electrostatic signal, the second electrostatic detection voltage supplying unit including a second NMOS transistor; wherein the driving unit includes: