Short circuit and over-voltage protection for a data bus

Details Short circuit and over-voltage protection for a data bus Short circuit and over-voltage protection for a data bus

2007-12-12

2010-11-16

Nguyen, Danny (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

C361S111000

Reexamination Certificate

active

07835124

ABSTRACT:
An apparatus for protecting a device against an over-voltage condition that is in excess of its breakdown voltage includes a detector for detecting the over-voltage condition and a protection circuit for protecting the device in response to detection of the over-voltage condition. The protection circuit may include a transmission gate and a PMOS transistor for producing a protection signal. The protection signal may be applied to a gate and/or a drain and/or a source and/or a well of the device such that a voltage across the device does not exceed the breakdown voltage. The protection signal may be derived from the over-voltage condition independent of whether a supply of power to the device is present.

REFERENCES:
patent: 5654858 (1997-08-01), Martin et al.
patent: 6049445 (2000-04-01), Gauthier et al.
patent: 6400546 (2002-06-01), Drapkin et al.
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patent: 7259614 (2007-08-01), Baker et al.
patent: 7667939 (2010-02-01), Kiuchi
patent: 2007/0047164 (2007-03-01), Biagi

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