ESD protection for inputs requiring operation beyond supply volt

Details ESD protection for inputs requiring operation beyond supply volt ESD protection for inputs requiring operation beyond supply volt

1992-09-11

1994-03-01

Ngo, Ngan

Active solid-state devices (e.g., transistors, solid-state diode

Field effect device

Having insulated electrode

257355, 257356, 257361, 257378, 257653, 361 91, 361100, 361101, H01L 2702, H01L 2906, H01L 2978

Patent

active

052910512

ABSTRACT:
A circuit utilizable for protecting an integrated circuit feature from electrostatic discharge is disclosed. A first bipolar transistor has its emitter connected to the IC feature and its collector connected to ground. A second bipolar transistor has its emitter connected to the IC feature and its collector connected to its base and to the base of the first bipolar transistor. A field effect transistor has its gate and drain connected to the IC feature and its body connected to its source and to the collector and base of the second bipolar transistor and to the base of the first bipolar transistor. A diode has its cathode connected to the body and the source of the field effect transistor and to the collector and base of the second bipolar transistor and to the base of the first bipolar transistor.

REFERENCES:
patent: 4633283 (1986-12-01), Avery
patent: 4819047 (1989-04-01), Gilfeather et al.

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