Is there anyway of disabling the feature that uses extrapolated information from the last DC convergence for the next Analysis/datapoint. It is preventing convergence in many of my simulations
Example. I run an AC and TRAN analysis together. It runs the AC first and DC converges at a particular set of conditions. Then when it runs TRAN is trys to use an extrapolated/interpolated guess from the AC's DC convergence conditions as a starting point for the TRAN. When it does this I get no DC convergence in TRAN, but when I run just TRAN under the exact same conditions, the DC converges instantly. This same problem is seen occasionally in corner and parameter sweeps under any single analysis tool where it will converge just fine if a particular simulation is run alone, but when run in a sweeped simulation it will not converge.
Can I disable the feature which uses the prior convergence data for the next datapoints initial guess??? I am looking for something similar the the HB's restart command.
???
Example. I run an AC and TRAN analysis together. It runs the AC first and DC converges at a particular set of conditions. Then when it runs TRAN is trys to use an extrapolated/interpolated guess from the AC's DC convergence conditions as a starting point for the TRAN. When it does this I get no DC convergence in TRAN, but when I run just TRAN under the exact same conditions, the DC converges instantly. This same problem is seen occasionally in corner and parameter sweeps under any single analysis tool where it will converge just fine if a particular simulation is run alone, but when run in a sweeped simulation it will not converge.
Can I disable the feature which uses the prior convergence data for the next datapoints initial guess??? I am looking for something similar the the HB's restart command.
???
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Run DC analysis and write the solution into a file. This can be found on the "Options" Controller (Write DC solution to file).
When simulating AC, Tran, and HB - Read that DC solution on the Options card as well.
In HB, you can also read in the DC solution on the HB Controller under Parameters set menu.
In Transient analysis, make sure that the tolerances are set the same as they were set when running the DC solution on the Options card.-- If they are not set the same, transient could result with non-convergence.
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