Electricity: electrical systems and devices – Safety and protection of systems and devices – Transient responsive
Patent
1998-09-30
2000-05-16
Sherry, Michael J.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Transient responsive
361 56, 361 913, 361 915, H02H 322
Patent
active
060645563
ABSTRACT:
A protection circuit for a pulse type power supply line of an integrated circuit device. The protection circuit includes a switching circuit having a preset delay, and a first transistor that is connected between the pulse power supply line and ground. The gate terminal of the first transistor is coupled to ground through a first resistor, and to a second power supply line for a low DC voltage through the switching circuit. In a preferred embodiment, the switching circuit includes a second transistor that is connected between the gate terminal of the first transistor and ground. The gate terminal of the second transistor is coupled to the second power supply line through a current generator, and is also coupled to ground through a resistive element and a capacitive element that are connected in parallel.
REFERENCES:
patent: 4630162 (1986-12-01), Bell et al.
patent: 5852541 (1998-12-01), Lin et al.
European Search Report dated Feb. 19, 1998 with annex on European Application No. 97 830485.
Galanthay Theodore E.
Sherry Michael J.
STMicroelectronics S.r.l.
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