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How to silence noise of different part of circuit by a parameter in Transient simulation?

Leo66

I want to evaluate the noise contribution of different part of the circuit in transient simulation. Currently, select the option "Noise Contribution" in Transient Noise will help, but it means I have to change the Instance List every time.

For example, I want to simulate the each noise of /I3 & /I555, I have to run the simulation twice, and choose /I3 & /I555 respectively every time. Is there any way can I run the two simulation simultaneously, and with different components of circuit silenced respectively in ADE_XL?

  • Andrew Beckett

    Yes, in ADE XL have two copies of the test - each with different settings of the Instance List. Then by setting the number of jobs in the ADE XL/Assembler job policy, you can run both simulations in parallel.

    Andrew

  • Leo66
    in reply to Andrew Beckett

    Hi Andrew

    I'm not sure whether I made the correct settings or have some misunderstanding. In ADE_XL, two Tests added with only transient noise option differs, Fig. 1. Also, in the results panel I can see two simulation results in paralell in each parameter sweep, as /Deci_1st or /IPRB8  has two results in Fig. 2.

    When I want to plot the two results, indeed, two windows came out, but all plots the same results of the first test. How to plot the results of the second test settings? Thanks

  • Andrew Beckett
    in reply to Leo66

    I just tried this (in case of some strange but unlikely problem), and it worked correctly (I too was enabling/disabling the noise for a subckt instance). I checked in Assembler (ADE XL is no longer supported), but I doubt it would be different in ADE XL.

    You didn't show how you are plotting the results.

    This would probably be easier to work through with customer support as then you could have a screen-sharing session to show what you're doing and maybe we can spot what is wrong. Knowing the IC and Spectre versions that you're using would be useful too.

    Andrew

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