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Dynamic paramters "temp" doesn't work? (Solver = Ultrasim, transient analysis)

SpiceMonkey

Hi,I am doing mixed signal AMS verification, when I use spectre as analog solver, dynamic paramters in transient analysis works.

While when I use ultrasim as analog solver, dynamic parameters doesn't work, is my software version too old? or I missed somewhat configuration, could anyone help? thank you!

[incisive152/xcelium1803 + spectre 19.1 + ultrasim 17.1]

  • Andrew Beckett

    Ultrasim doesn't support dynamic parameters in transient, so it's not supported in AMS Ultra either (note, AMS Ultra is deprecated - I believe the latest XCELIUM versions don't support it beyond XCELIUM1909.

    Andrew

  • SpiceMonkey
    in reply to Andrew Beckett

    Thank you Andrew. For a mixed signal verification system, "RTL digital block" and "analog veriloga/verilogams/macroModel", I have set "use ++aps" and "sampled", but APS is still much slower than Ultrasim, is any other configuration to improve simulating speed?

    For the case of "RTL" + "transistor level ADC", I tried XPS but always cant achieve enough accuracy. The digital blocks in analog are timing circuits such as non-overlaping / delay units, so these timming circuit is not supposed to be digital partition? Do you have any suggestion? thank you.

  • Andrew Beckett
    in reply to SpiceMonkey

    The best thing would be to contact customer support. There is control over forcing blocks to be analog or digital with XPS, but I think it would be best to talk to us about it.

    Andrew

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