Patent ID: 7679870

Claim:
An on-chip ESD protection circuit using enhancement mode high electron mobility transistor (E-mode HEMT)/metal semiconductor FET (MESFET) technology, for using between a pad point to main RF circuit input and a ground point to ground, comprising: a triggering diode string connected between the pad point and the ground pint; and a plurality of E-mode HEMT/MESFET having gates coupled to the triggering diode string connected between the pad point and the ground point in parallel to the triggering diode string, wherein the plurality of E-mode HEMT/MESFET triggered by the triggering diode string to shunt the voltage spike between the pad point and the ground point, wherein the plurality of E-mode HEMT/MESFET having dual gates capable of reducing parasitic capacitance for implement of RF circuits and optoelectronic integrated circuits (OEIC), a first gate of the plurality of E-mode HEMT/MESFET coupled to the triggering diode string for switch configuration and a second gate of the plurality of E-mode HEMT/MESFET coupled to drain.