Power-rail ESD protection circuit without lock-on failure
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United States of America Patent
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Jul 27, 2010
Grant Date -
Apr 2, 2009
app pub date -
Jan 23, 2008
filing date -
Sep 27, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An ESD protection circuit including a discharge device, a first detection circuit, and a second detection circuit. The discharge device provides a discharge path between a first power rail and a second power rail when the discharge device is activated. The discharge device stops providing the discharge path when the discharge device is de-activated. The first detection circuit is coupled between the first and the second power rails. The first detection circuit activates the discharge device when an ESD event occurs in the first power rail. The second detection circuit de-activates the discharge device when the ESD event does not occur in the first power rail.
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