Wide range ESD protection with fast POR transient time
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United States of America Patent
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Dec 19, 2017
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app pub date -
Aug 30, 2016
filing date -
Aug 30, 2016
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Abstract
A POR circuit includes a voltage divider coupleable between a supply voltage and a POR trace, including a first element coupled between the supply voltage and a node, and a second element coupled between the node and the POR trace. A switch is drain to source coupled between the POR trace and a reference voltage. A first decoupling capacitor is coupled between the POR trace and the reference voltage. A second decoupling capacitor is coupled between the node and the reference voltage. ESD protection for an integrated circuit includes charging a node of a voltage divider coupled between a supply voltage and a POR trace to a predetermined percentage of the supply voltage, decoupling high frequency noise with a first decoupling capacitor between the POR trace and a reference voltage, and decoupling low frequency noise with a second decoupling capacitor between the node and the reference voltage.
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