Electrical over stress robustness

Details Electrical over stress robustness Electrical over stress robustness

2004-04-12

2009-08-11

Fleming, Fritz M (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transient responsive

C361S056000, C361S091100, C361S117000, C361S118000, C361S119000

Reexamination Certificate

active

07573691

ABSTRACT:
Protection is provided against electrical surges resulting from Electrical Over Stress conditions, e.g., when interfacing circuits with powered connections. An EOS shunt is activated for as long as the EOS condition exists. EOS protection using an EOS shunt in accordance with the principles of the present invention remains activated by a voltage threshold trigger as long as necessary. In a disclosed embodiment, an EOS shunt includes a voltage threshold detector that detects a voltage on a power bus with respect to a ground rail exceeding a predetermined amount, e.g., 5 volts in a device powered at 3.3 volts. During the EOS event, a path between power and ground comprising a transistor is turned on.

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1991-079049, Feb. 1991, Derwent.

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