Method and system of synchronizing data to reference time signal with data resampling

摘要

A device receives a data signal and a reference timing signal provided from a first clock. The device includes a sample clock that operates independently from the first clock, wherein the sample clock outputs a sample clock signal that is asynchronous with the reference timing signal; a sampler for sampling a data signal in accordance with the sample clock signal and outputting a sampled data signal; and a resampler for resampling the sampled data signal according to a resampling ratio and outputting a resampled data signal such that a number of data samples in the resampled data signal within a synchronization time interval defined with respect to the reference timing signal equals a nominal number of data samples that would occur in the sampled data signal within the synchronization time interval when the sample clock signal was synchronized to the reference timing signal.

主权项

1. A device, comprising:
an input configured to provide a reference timing signal generated from a first clock; a sample clock that operates independently from the first clock, wherein the sample clock outputs a sample clock signal that is asynchronous with the reference timing signal; a sampler configured to sample a data signal in accordance with the sample clock signal and outputting a sampled data signal; a resampler configured to resample the sampled data signal according to a resampling ratio and outputting a resampled data signal such that a number of data samples in the resampled data signal within a synchronization time interval defined with respect to the reference timing signal equals a nominal number of data samples that would occur in the sampled data signal within the synchronization time interval when the sample clock signal was synchronized to the reference timing signal; and a time stamper configured to periodically insert time stamps within the resampled data signal at fixed time intervals as measured with respect to the reference timing signal.