Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Reexamination Certificate
2007-07-10
2007-07-10
Jackson, Stephen W. (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Load shunting by fault responsive means
Reexamination Certificate
active
10858798
ABSTRACT:
An electrostatic discharge protection (ESD) circuit is disclosed for protecting a pad of an integrated circuit from ESD events. The ESD circuit has an ESD trigger module having a first and second transistors connected in series, between the pad and a first common node, at least one ESD protection module having a third and fourth transistors connected in series between the pad and a second common node, and a current limiting resistor in the ESD trigger module connected between the first and second common nodes, wherein the first and second transistors have a shorter channel length than that of the third and fourth transistors so that the ESD trigger module is turned on before the ESD protection module when an ESD event happens on the pad.
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Benenson Boris
Jackson Stephen W.
Taiwan Semiconductor Co., Ltd.
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