Power pin to power pin electro-static discharge (ESD) clamp

An ESD clamp circuit for use between separate power rails. An ESD clamp is based on a wide nMOSFET. A symmetrical circuit is designed vis-à-vis the two power rails, with respect to ground, allowing discharge of an ESD surge in both polarities of stress. An nMOSFET device drives the gate of a large n...

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Main Authors Bhattacharya, Dipankar, Kriz, John, Leung, Che Coi, Loeper, Duane J, Smooha, Yehuda
Format Patent
LanguageEnglish
Published 05.05.2009
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Abstract An ESD clamp circuit for use between separate power rails. An ESD clamp is based on a wide nMOSFET. A symmetrical circuit is designed vis-à-vis the two power rails, with respect to ground, allowing discharge of an ESD surge in both polarities of stress. An nMOSFET device drives the gate of a large nMOSFET (e.g., having a device width between 1000 and 10,000 microns). The large power rail-to-power rail nMOSFET has its gate controlled by the output inverter stage of either ESD detection circuit connected to a respective power supply rail. The gate is switched to a common ground during normal operation of the integrated circuit.
AbstractList An ESD clamp circuit for use between separate power rails. An ESD clamp is based on a wide nMOSFET. A symmetrical circuit is designed vis-à-vis the two power rails, with respect to ground, allowing discharge of an ESD surge in both polarities of stress. An nMOSFET device drives the gate of a large nMOSFET (e.g., having a device width between 1000 and 10,000 microns). The large power rail-to-power rail nMOSFET has its gate controlled by the output inverter stage of either ESD detection circuit connected to a respective power supply rail. The gate is switched to a common ground during normal operation of the integrated circuit.
Author Bhattacharya, Dipankar
Leung, Che Coi
Loeper, Duane J
Kriz, John
Smooha, Yehuda
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References Pianka (5345357) 19940900
Voldman (6455902) 20020900
Ker et al. (5631793) 19970500
Merrill (5239440) 19930800
Saleh (5991135) 19991100
Ker et al. (6249410) 20010600
Kwong (6118640) 20000900
Hatzilambrou et al. (2003/0039084) 20030200
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Snippet An ESD clamp circuit for use between separate power rails. An ESD clamp is based on a wide nMOSFET. A symmetrical circuit is designed vis-à-vis the two power...
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Title Power pin to power pin electro-static discharge (ESD) clamp
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