Binary stochastic time-to-digital converter and method
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United States of America Patent
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Mar 27, 2018
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Apr 1, 2017
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Apr 1, 2017
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Abstract
A method and apparatus for determining a difference between signal edges in two signals includes a multiple stage converter where each stage determines which of the two signals has an earlier signal edge, outputs a value corresponding to that determination, and then applies a delay to the earlier signal that is equal to half of the delay applied by the next previous stage. The stages examine smaller and smaller intervals to the sought-after signal edge. Each stage includes a plurality of logic elements. If all logic elements in the stage output the same signal, the edge position is clear. If some of the logic elements in the stage vote differently than others in the state due to differences in setup time for the different elements, the edge location has been found within the sensing band of the stage.
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