Timeline for What's wrong with my RC circuit transient simulation in Cadence Virtuoso?
Current License: CC BY-SA 4.0
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| Jun 11, 2020 at 15:10 | history | edited | CommunityBot |
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| Apr 16, 2019 at 19:00 | vote | accept | Leey | ||
| Apr 15, 2019 at 17:11 | answer | added | jonk | timeline score: 0 | |
| Apr 15, 2019 at 14:02 | comment | added | Leey | Thanks for help Jonk! This is exactly what I expect, I consulted Cadence forum, and I learnt that to do such a transient simulation with a DC source, the 'initial state' of capacitor has to be set to 0V, otherwise, the initial state of capacitor will have 20V by default. | |
| Apr 12, 2019 at 19:47 | comment | added | jonk | I can't actually help you with Cadence Virtuoso. I simply don't have nor use it. However, I can show you an image from LTspice. Is that what you are looking for? Note the UIC parameter to the .TRAN that I used? Maybe something there helps. | |
| Apr 12, 2019 at 19:32 | comment | added | Leey | Thank you Jonk. It's weird because the voltage already converge to 20V at <0.1us. But I tried 1ms as well, I still cannot see the expected curve. | |
| Apr 12, 2019 at 19:24 | comment | added | jonk | One thing I see is that your .TRAN time appears to be limited to \$3\:\mu\text{s}\$, which is far from the RC time constant of \$200\:\mu\text{s}\$. Are you looking to see the typical RC exponential curves for voltage and current? If so, you may want to set the .TRAN simulation time to about \$1\:\text{ms}\$ or so. (I've no idea if this will help your situation. It's just that the time period seems so short that perhaps your simulator is behaving badly, numerically.) LTspice has no problem showing the exponential curves, by the way. | |
| Apr 12, 2019 at 19:15 | review | First posts | |||
| Apr 12, 2019 at 21:34 | |||||
| Apr 12, 2019 at 19:11 | history | asked | Leey | CC BY-SA 4.0 |
