Altera_Forum
Honored Contributor
Honored Contributorhow tooutput a high speed clock
I need a clock to control high speed AD.But I measure it with oscillograph finding it is very bad so that AD can't work. thank you very much
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Altera_ForumHonored Contributor
Honored Contributor------
This will of only work if you have a trigger to start the sampling at exactly the same instant every time. Oh yeah. the trigger needs to have low jitter ... I don't know why I need a trigger to start the sampling. I think I just need to count(assume the count value is N) in a period of the signal by 200M clock to get the period.Sample one point per N+1 cycle,and then I can get a 200M equivalent sampling rate(If I use 100M clock ,I can get a 100M equivalent). The trigger is a problem.Because I need to measure the period of signal(as I mentioned before,counting in a period of the signal by 200M clock ). I can't adjust the signal to a square wave with a low jitter. It confused me for a long time.
