Two-stage post driver circuit
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United States of America Patent
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Jan 13, 2015
Issued Date -
N/A
app pub date -
Dec 16, 2013
filing date -
Mar 2, 2011
priority date (Note) -
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Abstract
A two-stage post driver circuit includes a controlling circuit, a pull-up unit and a pull-down unit. A first N-type transistor of the pull-down unit and a first P-type transistor of the pull-up unit are both connected to an output pad. The controlling circuit is used for controlling the first N-type transistor and the first P-type transistor. Consequently, when the pull-up unit or the pull-down unit is turned on, the voltage difference between the drain terminal and the source terminal of the first N-type transistor or the first P-type transistor is lower than a voltage stress.
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