ESD protective circuit having low leakage current
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United States of America Patent
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Jun 29, 2010
Grant Date -
Feb 14, 2008
app pub date -
Aug 10, 2007
filing date -
Aug 10, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
An ESD protective circuit having a contact terminal, a first supply voltage terminal for a first supply potential, a second supply voltage terminal for a second supply potential, a transistor chain having several transistors, wherein drain terminals of the transistors are connected to one of the supply voltage terminals, wherein the control terminal of a first transistor of the transistor chain is connected to the other supply voltage terminal, wherein the source terminal of the last transistor of the transistor chain is connected to the contact terminal, and a current source which is connected to a source terminal of at least one of the transistors of the transistor chain and is able to provide a current which compensates, up to a maximum tolerable voltage deviation from the first or second supply potential at the contact terminal, a current flowing into or from the source terminal.
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