Patent ID: 7545614
Filing Date: 2009-06-09
Classification: H01L,H02H

Abstract:
1. An electrostatic discharge protection device for limiting the effects of electrostatic discharge, comprising: a first resistor connected in series with a first capacitor between an input voltage rail and a substrate voltage rail; a mosfet transistor having a gate terminal connected to a node between the first resistor and the first capacitor, and a source terminal connected to the input voltage rail; a second resistor and a second capacitor connected in parallel to one another between the drain terminal of the mosfet transistor and the substrate voltage rail; a blocking device connected to the second resistor and the second capacitor; and a second transistor having its drain terminal and source terminal connected between the voltage rails and its gate terminal connected to the cathode of the blocking device, wherein the blocking device is connected in series with the drain of the mosfet transistor and the gate terminal of the second transistor.