Pull-up devices
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United States of America Patent
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-
Jan 27, 2009
Grant Date -
Feb 21, 2008
app pub date -
Dec 14, 2006
filing date -
Jun 20, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pull-up device coupled between an input/output (I/O) pad and a core circuit and has a static pull-up circuit, an adjustment unit, and a control circuit. The static pull-up circuit is coupled to the core circuit and receives a supply voltage. The adjustment unit is coupled to the I/O pad and generates an adjustment signal according to an input voltage of the I/O pad. The control circuit is coupled to the adjustment unit and the static pull-up circuit and controls the static pull-up circuit according to the adjustment signal.
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