Unlock detector, unlock-detecting method and clock and data recovery circuit
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United States of America Patent
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Apr 10, 2018
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N/A
app pub date -
Mar 24, 2017
filing date -
Jul 11, 2016
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Abstract
An unlock detector includes a checker, an accumulator, and a comparator. The accumulator is electrically connected to the checker, and the comparator is electrically connected to the accumulator. The checker includes several checking units. The checker is configured to receive a sampled data signal and a sampled edge signal, and to check the sampled data signal and the sampled edge signal via the checking units to generate several checking results. The accumulator is configured to generate a counting value in a manner of counting according to the checking results. The comparator is configured to compare the counting value with a threshold to generate an unlock-detecting result.
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