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Altera_Forum
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14 years ago

Sample synch. signal with unknown phase shift

Hi All, I have a following problem. I have two devices (Transmitter and receiver). Both devices have a synchronous clock with unknown phase. The distance of the devices is about 300m and they ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

I would use a phase-compensation FIFO. Since you have no idea what the phase is, they work quite well. You could probably make the offset 2 and have it work fine. Just make sure you release the reset once the clocks are stable. I've attached something I wrote up.

You could probably do something to detect the latency through and reduce it when it ends up being the high-end, or something like that, but I've never seen anyone do that.