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Ultrasim Verilog simulation with ncvlog

Bardia B

I have a problem with Ultraim Verilog. The problem is that my verilog code is not supported by verilog -XL and gives error.

I was wondering if there is anyway to  use nc-vlog instead of Verilog -XL during ultrasim verilog simulation?

 Thank you,

Bardia 

  • You should use "ams" (AMS Designer) as the simulator. SpectreVerilog and UltrasimVerilog are obsolete technology and have been for many years. 

    Regards,

    Andrew 

  • Thanks Andrew for your quick reply. The problem with AMS is that I cannot use ultrasim for transient analysis using AMS. It uses only spectre for transient analysis. I don't know if this is the case only with my Cadence or it is always like this. Ultasim option is only provided for envelope detection. I would like to use ultrasim transient analysis in order to be able to do faster transient simulations. please correct me if I am wrong.

  • Er, no. You can use ultrasim as the solver for transient sims too. Did you try just setting Simulation->solver and setting it to Ultrasim?

    Ultrasim has been supported with AMS for years and years, and always for transient.

    Regards,

    Andrew 

  • OMG! what a rookie mistake! Thanks a lot for your help Anderw. I didn't know that option (solver) exists at all.

    So when i choose the ultrasim in solver, the conservative/moderate/liberal option will be ignored? (accuracy options during enabling the transient analysis)

    also I get an error like this when I run the simulation:

    No connection module found: Need an input port of discrete discipline logic, and an output port of continuous discipline electrical.

    Do i need to insert a connection betwenn digital (verilog) module and analog part to convert logic levels to voltage level, right? where I can find this connection module?

    Sorry if these are very basic  questions. But this is the first time I am running mixed-mode simulation. I would appreciate if you can introduce a good tutorial or user guide for this.

    Thanks again,
    Bardia.

  • The problem is solved and the ams designer is running perfectly.

     Thanks for your help Andrew. 

     

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