Hello,
I am trying to simulate a circuit with newly developed custom device model but am facing DC convergence issues which I have not been able to resolve with the available online resource on the support website so far.
I am using IC-618 & Spectre-211 (Version 21.1.0.303.isr5 64bit) in ++APS mode in a schematic with just 2 devices a couple of DC voltage sources.
Below are some of the messages from output log so any suggestions on how to diagnose the model specific issues will be very helpful.
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Post-Simulation Summary
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Analysis Analysis ID CPU (s) Elapsed (s)
1 info checkNPN_asserts 2.01e-03 2.62e-03
2 dc dcOp 2.08e-02 2.14e-02
3 info dcOpInfo 1.55e-03 2.06e-03
4 info modelParameter 1.23e-03 1.70e-03
5 info element 4.15e-03 4.87e-03
6 info outputParameter 1.25e-03 2.09e-03
7 info designParamVals 1.00e-02 1.11e-02
8 info primitives 6.77e-04 1.66e-03
9 info subckts 1.66e-03 2.52e-03
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Total 4.33e-02 5.00e-02
Average 4.82e-03 5.56e-03
Elapsed Min info primitives 6.77e-04 1.66e-03
Elapsed Max dc dcOp 2.08e-02 2.14e-02
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Error found by spectre during DC analysis `dcOp'.
ERROR (SPECTRE-16385): There were 13 attempts to find the DC solution. In some of those attempts, a signal exceeded the blowup limit of its quantity. The last signal that failed is V(I26.BETA) = -1.15146 GV, for which the quantity is `V' and the blowup limit is (1 GV). It is possible that the circuit has no DC solution. If you really want signals this large, set the `blowup' parameter of this quantity to a larger value.
ERROR (SPECTRE-16080): Cannot print DC solution because DC did not converge. Resolve the convergence issue and rerun the simulation.
thanks