Zener triggered overvoltage protection device

Details Zener triggered overvoltage protection device Zener triggered overvoltage protection device

2007-03-27

2007-03-27

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

C361S056000

Reexamination Certificate

active

10298134

ABSTRACT:
An overvoltage protection device is formed in a semiconductor substrate having a plurality of doped regions for forming semiconductor devices. The overvoltage protection device is adapted to draw current away from a device to be protected from excess voltage and has a switchable device having a terminal adapted to be coupled to a potential source of excess voltage and to the semiconductor substrate for drawing current away from the potential source of excess voltage when the switchable device is triggered, and for directing the current to the semiconductor substrate.A Zener diode is coupled to a second terminal of the switchable device to trigger the switchable device to a conducting state. The Zener diode is formed in the same doped region of the substrate as the trigger of the switchable device.

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