Electrostatic discharge protection circuit and semiconductor circuit device
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United States of America Patent
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Sep 1, 2015
Grant Date -
Jul 10, 2014
app pub date -
Dec 19, 2013
filing date -
Jan 7, 2013
priority date (Note) -
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Abstract
The invention provides an electrostatic protection circuit that is effective in absorbing static electricity that is continuously input. The electrostatic protection circuit includes a circuit constituting a latch and a static electricity absorption circuit. When static electricity is input, the static electricity absorption circuit maintains its on state for a while at an output held by the latch circuit, and absorbs static electricity that is continuously input. When the static electricity has been absorbed, the output of the latch is inverted so as to turn off the static electricity absorption circuit, and the operation of absorbing static electricity ends. At this point in time, normal operation serving as an input terminal is performed.
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