Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
Reexamination Certificate
2006-12-07
2008-11-25
Jackson, Stephen W (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific voltage responsive fault sensor
Reexamination Certificate
active
07457091
ABSTRACT:
A protection circuit with a positive field effect transistor coupled to a power source, a negative field effect transistor connected to a pass-gate and a circuit ground, a circuit input terminal, a multi-level source of protection voltage coupled to an external circuit and at least three additional field effect transistors. A drain of the negative field effect transistor couples to a gate of the positive field effect transistor. When the circuit input terminal is low the pass-gate is on; when the circuit input terminal is high the pass-gate is off. Embodiments of the invention also include stacks of three or more field effect transistors.
REFERENCES:
patent: 5654663 (1997-08-01), McClure et al.
Bernard Dan P.
Schiff John C.
Wiedemeier Glen A.
Cantor & Colburn LLP
International Business Machines - Corporation
Jackson Stephen W
Salys Cas
Willoughby Terrence R
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