Operation point calculation

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tzg6sa

Member level 2
I have noticed, that the operating point is calculated as many times as many analysis need it. For example if one run a dc, an ac and a stb simulation, the operating point will be calculated 3 times. Sometimes the calculations take a while. How can I force the Simulator to use the result of the dc simulation?

I have checked the prevopppoint radio box in the options of AC and STB analysis.
SPECTRE was used with Analog Design Enviroment from Cadence.

LvW

tzg6sa said:
I have noticed, that the operating point is calculated as many times as many analysis need it. For example if one run a dc, an ac and a stb simulation, the operating point will be calculated 3 times. ........
An operating point is one specific point within the dc analysis.
Thus, it is NOT calculated in advance because it makes no sense.

tzg6sa

Member level 2
LvW said:
Thus, it is NOT calculated in advance because it makes no sense.
It is. That's why I have asked the question.
LvW said:
An operating point is one specific point within the dc analysis.
Right.

The OP was calculated many times, since the dc analysis has run last and thus the OP was not present when the other analysis have run.

Solution:
Set the simulation order in Setup->Enviroment->Analysis Order field. The DC analysis should be the first.

chevron_guy

points: 2