DETERMINING A LOCKED STATUS OF A CLOCK TRACKING CIRCUIT
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United States of America Patent
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Issued Date -
Mar 14, 2024
app pub date -
Sep 12, 2023
filing date -
Sep 12, 2022
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Abstract
An example apparatus includes a phase detector, a digital discriminator, and a logic circuit. A status signal of the phase detector is at least partially based on a phase relationship between a reference clock and a feedback clock, the feedback clock generated by a clock tracking circuit to track the reference clock. The digital discriminator may sample the status signal of the phase detector. The logic circuit may determine a locked status of the clock tracking circuit at least partially based on samples of the status signal of the phase detector.
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