Bipolarity electrostatic discharge protection device and method

Details Bipolarity electrostatic discharge protection device and method Bipolarity electrostatic discharge protection device and method

1995-11-02

1997-07-01

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361111, H02H 900

Patent

active

056444591

ABSTRACT:
A circuit and method for protecting an integrated circuit during positive and negative ESD events. During both positive and negative ESD events, the circuit conducts ESD current through a turned on device. The circuit includes a pad, a voltage supply rail, a field effect transistor connected across the pad and the voltage supply rail, and an enabling circuit connected across the gate of the field effect transistor and the pad. During a positive ESD event, the field effect transistor is turned on to provide a conductive path between the pad and the voltage supply rail. During a negative ESD event, the bipolar transistor inherent in the field effect transistor is turned on to provide a conductive path between the pad and the voltage supply rail.

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