High-voltage tolerant power rail electrostatic discharge...

Details High-voltage tolerant power rail electrostatic discharge... High-voltage tolerant power rail electrostatic discharge...

2007-10-16

2007-10-16

Sherry, Michael (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

C361S091100, C361S111000

Reexamination Certificate

active

11428571

ABSTRACT:
A high-voltage tolerant power-rail ESD clamp circuit is proposed, in which circuit devices can safely operate under the high power supply voltage that is three times larger than their process limitation without gate-oxide reliability issue. Moreover, an ESD detection circuit is used to effectively improve the whole ESD protection function by substrate-triggered technique. Because only low voltage (1*VDD) devices are used to achieve the object of high voltage (3*VDD) tolerance, the proposed design provides a cost effective power-rail ESD protection solution to chips with mixed-voltage interfaces.

REFERENCES:
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patent: 5719737 (1998-02-01), Maloney
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patent: 5930094 (1999-07-01), Amerasekera
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patent: 7203045 (2007-04-01), Chatty et al.
patent: 7230806 (2007-06-01), Poon et al.
Timothy J. Maloney, Novel Clamp Circuits for IC Power Supply Protection, IEEE Transactions on Components, and Manufacturing Technology, Part C, vol. 19, No. 3, Jul. 1996.

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