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Altera_Forum
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9 years ago

report_net_timing results values and units?

I've got various ring oscillator circuits that I'd like to get delay timing information for. report_net_timing on the delays in a ring gives results in a table like the one below: ;# ; No...
Altera_Forum's avatar
Altera_Forum
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9 years ago

nanoseconds. Note that there is large variation in delays, so your ring oscillator could have very large frequency differences over PVT(which is why ring oscillators are not recommended except for corner cases where you're doing some non-synchronous circuit). So if asked about ring oscillators, I lead off by saying, "Don't do it", but if you really want to, I put together the following document:

http://www.alterawiki.com/wiki/ring_oscillator