Clock domain crossing
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United States of America Patent
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Sep 10, 2024
Grant Date -
Oct 12, 2023
app pub date -
Sep 8, 2021
filing date -
Sep 8, 2020
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Abstract
An electronic device comprises a synchronisation system that receives a signal clocked by a first clock signal having a first frequency and receives a second clock signal having said first frequency, but offset in phase from the first clock signal. The signal is delayed by an adjustable delay period. It is determined whether, following a logic transition in the delayed signal, the next clock edge received is an active edge or is a non-active edge. A calibration controller increases the delay period when the next clock edge is a non-active edge and maintains or decreases the delay period when the next clock edge is an active edge, or decreases the delay period when the next clock edge is an active edge and maintains or increases the delay period when the next clock edge is a non-active edge.
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