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Import Data to Cadence

Julinshah

Hello,

How can I import data file in to the cadence(.csv file)?

I am using Virtuoso spectre and I am doing transient analysis.

I am suppose to take input from matlab and that output file from matlab is generated in .csv file.

Thank you.

Julin

  • Andrew Beckett

    If you have a file with two columns, time and value, you could use a vsource or isource from analogLib with the type set to "pwl" and the input from the specified file, and generate a piece-wise-linear input that way.

    Regards,

    Andrew.

  • Rtookl
    Hello,

    This is perfect for transient, but what about other data like phase noise? Is there any way to import them into results brower?

    Regards,
    Armin
  • Andrew Beckett

    The port and vsource components in analogLib allow you to specify a noise file as SSB phase noise (versus frequency) pairs; this can then be used in an hbnoise/pnoise simulation. Is that what you want?

  • Rtookl
    Hello Andrew,

    Can it also be in CSV format? I tried with a simple two-column CSV file and it failed (first collumn frequenyc, second collomn phase noise). Is there a specific arrangement that is readable for Pnoise?

    Actually, I am more interested in plotting my measurements on top of my simulation results. The most common form of data that I measure/simulate are usually sweeps, like measured IMD, HD, PN vs some sweeping parameter like gain, bias, etc. I cannot think of any way to use a file-reading source to generate plots out of these measured results in CSV format. Is there something I can do with calculator maybe?

    Regards,
    Armin
  • Andrew Beckett

    Hi Armin,

    The file needs to be space separated, not comma-separated. Presumably you could edit the file.

    If you want to just plot the measurements on top of your simulation results, use the getAsciiWave function in the calculator to read the file (this will cope with CSV). Then use Right Mouse->Allow Any Units over the x-axis and y-axis of your simulated phase noise graph, and then you'll be able to plot the getAsciiWave results on the same graph. This way you don't need to read the file into the simulation.

    Regards,

    Andrew

  • Lyrad
    in reply to Andrew Beckett

    i don't have a lot of experience with Virtuoso spectre and i am facing the same difficulty. i want to create a Vsource having a gaussian distribution by varying the temperature. Could please tell me how to do it.

  • Andrew Beckett
    in reply to Lyrad
    Lyrad said:
    i don't have a lot of experience with Virtuoso spectre and i am facing the same difficulty. i want to create a Vsource having a gaussian distribution by varying the temperature. Could please tell me how to do it.

    First of all, please read the Guidelines for the Custom IC Design Forum - you've posted in the middle of a 7 year old thread (which the guidelines ask you not to do), without any version information (again, read the guidelines).

    However, I simply don't understand what you mean. This doesn't appear to be the same problem - what does a "vsource having a Gaussian distribution by varying the temperature" mean? I've no idea what you're asking for - so create a new post with clear details describing your objective, what you've tried and which software versions you're using.

    Regards,

    Andrew

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