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Altera_Forum's avatar
Altera_Forum
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11 years ago

Delays and glitches in simulation

Hi, I wonder if I misunderstand something or the Qartus simulation is not able to consider state changes I want to display. I started with the Quartus demo program 'light'. I noticed that the...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

The simulator has a resolution limit, by default set to 100ps I think (maybe even 1 ns). So any glitches smaller than this will not show up. You can change the resolution limit in the modelsim.ini file or with the -t option to the vsim comand. It can be set as low as 1fs.