Data output circuit
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United States of America Patent
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Oct 11, 2016
Grant Date -
Mar 8, 2012
app pub date -
Sep 6, 2011
filing date -
Sep 7, 2010
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A data output circuit includes a main driver including a pull-up driver, coupled between a power supply terminal and a node coupled to the pad and a pull-down driver coupled between the node and a ground terminal, an impedance controller configured to control an output impedance at the node by sensing a voltage at the node and to generate pull-up control signals and pull-down control signals based on the sensed voltage, and a pre-driver configured to control driving strengths of the pull-up driver and the pull-down driver in response to the pull-up control signals, the pull-down control signals, and data.
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