Electrostatic discharge protection circuit

Details Electrostatic discharge protection circuit Electrostatic discharge protection circuit

2006-10-03

2006-10-03

Leja, Ronald W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

C361S056000

Reexamination Certificate

active

07116536

ABSTRACT:
An ESD protection circuit includes a detection circuit for detecting an ESD current and a bypass circuit for bypassing the ESD. The detection circuit and bypass circuit are connected to a first pad and a second pad. The bypass circuit is connected to an output terminal of the detection circuit. The bypass circuit comprises a MOS transistor, a first bipolar transistor and a second bipolar transistor. The drain of the MOS transistor, the collectors of the first bipolar transistor and the collector of the second bipolar transistor are connected to the first pad. The source and the substrate of the MOS transistor and the emitter of the second bipolar transistor are connected to the second pad. The base of the first bipolar transistor is connected to the gate of the MOS transistor and the emitter of the first bipolar transistor is connected to the base of the second bipolar transistor.

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