Stats

  • Locked Locked
  • Replies 3
  • Subscribers 124
  • Views 16458
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

How we can use the single VCVS file containing N waveforms for generating the N voltage waveform sources in ADE-XL ?

RFStuff

Dear All,

I thought to create a new thread for this post instead of adding to an old but related thread.

We can save N voltage waveforms in a vcvs file by using the thread community.cadence.com/.../1285946

But, how we can use the single VCVS file for generating the N voltage waveforms  in ADE-XL ?

Kind Regards

Parents
  • Andrew Beckett

    It's not really ADE XL that is the issue here - the spectre vsource does not provide a means to specify which column to read from the file, so it only supports one time and one voltage column.

    The only alternative would be to write a Verilog A model which could read the data in the file and then you would specify the column to use.

    So in general, there's not really support to do this.

    Andrew.

Reply
  • Andrew Beckett

    It's not really ADE XL that is the issue here - the spectre vsource does not provide a means to specify which column to read from the file, so it only supports one time and one voltage column.

    The only alternative would be to write a Verilog A model which could read the data in the file and then you would specify the column to use.

    So in general, there's not really support to do this.

    Andrew.

Children
  • RFStuff
    in reply to Andrew Beckett

    Dear Andrew,

    Can it work like vsource functionally ? How it will know the time instant of when the simulator need the time point of the waveform. The simulator uses dynamic time steps

  • Andrew Beckett
    in reply to RFStuff

    You'd need to read the file and store the points (probably) and then use @(timer(...)) to schedule a time point at the point in the waveform file. I don't have any code that does this for reading a file, but a similar approach is used in How to specify more than one region of time where strobeperiod is enabled in a transient analysis (this has an array used to specify start/stop times for strobing, and then needs to strobe at specific timepoints within those windows). You might be able to borrow some ideas from that.

    With a PWL source, normally it only forces the timepoints (i.e. adds breakpoints) if there are fewer than 20 points - otherwise it assumes the waveform is "smooth" (allbrkpts is used to override this behaviour) - so you may or may not need to force timepoints depending on how smooth the waveforms are.

    Regards,

    Andrew.

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.