Semiconductor circuit with protective circuit

Details Semiconductor circuit with protective circuit Semiconductor circuit with protective circuit

2006-09-19

2006-09-19

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

Reexamination Certificate

active

07110232

ABSTRACT:
A semiconductor circuit in a semiconductor substrate includes a first input for feeding a first supply potential, a second input for feeding a second supply potential higher than the first supply potential, a device, an output and a parasitic pn-junction between the device and the semiconductor substrate, which is conductive at a first polarizing potential at the output smaller than the first supply potential or at a second polarizing potential at the output greater than the second supply potential. A protective circuit whose electric resistance at the first polarizing potential at the output and at the second polarizing potential at the output, respectively, is higher than at a normal operation potential at the output lying between the first supply potential and the second supply potential is connected between the output and the parasitic pn-junction.

REFERENCES:
patent: 5182470 (1993-01-01), Gariboldi et al.
patent: 5270565 (1993-12-01), Lee et al.
patent: 5608259 (1997-03-01), DeShazo et al.
patent: 5648739 (1997-07-01), Walther et al.
patent: 197 17 527 (1998-10-01), None
patent: 197 33 707 (1999-02-01), None

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