Methods and apparatus for determining threshold of one or more DFE transition latches based on incoming data eye
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United States of America Patent
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Dec 2, 2014
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app pub date -
Sep 28, 2007
filing date -
Sep 28, 2007
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Abstract
Methods and apparatus are provided for determining the threshold position of one or mote DFE latches using an evaluation of the incoming data eye. A threshold position is determined for one or more transition latches employed by a decision-feedback equalizer by obtaining a plurality of samples of a data eye using a data eye monitor; obtaining a vertical eye opening metric from the data eye monitor; and determining the threshold position for the one or more transition latches based on the vertical eye opening metric. A decision-feedback equalizer is also disclosed that comprises at least one data latch having a data threshold; and at least one transition latching having a transition threshold, wherein the transition threshold and the data threshold ate unequal.
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