Hot-pluggable over-voltage tolerant input/output circuit

Details Hot-pluggable over-voltage tolerant input/output circuit Hot-pluggable over-voltage tolerant input/output circuit

2005-01-11

2005-01-11

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

C361S090000

Reexamination Certificate

active

06842320

ABSTRACT:
Embodiments of the present invention provide a drive and biasing circuit for an input/output stage of a device. Embodiments of the present invention provide live-insertion protection by driving and biasing various nodes in the input/output stage. Embodiments of the present invention also provide over-voltage protection by biasing various nodes in the input/output stage during normal and live-insertion operating conditions. Embodiments of the present invention utilize the voltage on the supply and/or voltage present on the input/output terminal to provide the drive and bias voltage levels. Embodiments of the present invention are thus able to turn off current paths and protect various junctions against breakdown during over-voltage and live-insertion operating conditions.

REFERENCES:
patent: 6005413 (1999-12-01), Schmitt
patent: 6018257 (2000-01-01), Hung et al.
patent: 6130556 (2000-10-01), Schmitt et al.
patent: 6201428 (2001-03-01), Clark
patent: 6300800 (2001-10-01), Schmitt et al.

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