Oversampled phase lock loop in a read channel
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United States of America
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May 7, 2024
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N/A
app pub date -
Oct 3, 2022
filing date -
Oct 3, 2022
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Abstract
Example systems, read channels, and methods provide an oversampled digital phase lock loop for use in a read channel. The phase lock loop receives a digital data signal comprised of oversampled digital signal values with a sample rate that is a multiple of the baud rate of the channel. A set of oversampled digital signal values is selected for each iteration of the phase lock loop to correct the phase of an analog-to-digital converter. The phase lock loop determines a phase gradient, based on an iterative detector, and feeds back a phase correction for the next iteration of the phase lock loop. A baud rate digital data signal is provided to the rest of the channel based on down sampling or interpolated based on the phase gradient.
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