Semiconductor device
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United States of America Patent
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Mar 18, 2014
Grant Date -
Feb 28, 2013
app pub date -
Aug 24, 2012
filing date -
Aug 26, 2011
priority date (Note) -
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Abstract
A semiconductor device includes a variable resistor that sets a resistance value as a first resistance value in an emphasis mode, and as a second resistance value smaller than the first resistance value in a de-emphasis mode, a first driver that sets an output impedance as a third resistance value in the emphasis mode, and as a fourth resistance value larger than the third resistance value in the de-emphasis mode, a second driver that sets the output impedance as a fifth resistance value in the emphasis mode, and as a sixth resistance value larger than the fifth resistance value in the de-emphasis mode, and a controller that controls conductive states of the first and second drivers according to an input signal, and switches the output impedances of the first and second drivers and the resistance value of the variable resistor between the emphasis mode and the de-emphasis mode.
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