Self-powered timer apparatus
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United States of America Patent
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Feb 24, 2015
Grant Date -
Aug 21, 2014
app pub date -
Feb 20, 2013
filing date -
Feb 20, 2013
priority date (Note) -
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Abstract
A method is provided for implementing a timer using a floating-gate transistor. The method includes: injecting a charge into a floating-gate transistor at an initial time, where a gate terminal of the floating-gate transistor is comprised of polysilicon encased by an insulating material; creating lattice imperfections at boundary of the polysilicon to cause leakage from the floating-gate transistor; measuring current read out from the floating-gate transistor at a time subsequent to the initial time; and determining an amount of time between the initial time and the subsequent time using the measured current.
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