Stats

  • Locked Locked
  • Replies 10
  • Subscribers 128
  • Views 19667
  • 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

DC bias operating point, IC6.14, MMSIM10

Kabal

 Im trying to figure out how can i obtain DC biased operating point when doing different type of simulation in MMSIM10, under IC6.14?

 

Lets say i have some complicated circuit, and i put specific nodes for plotting (either in ac,dc,tran...and so on).

 But at the same time, i want to have a quick access to a list of table or something, which would tell me DC operating point at each node, as well as all transistor important voltages and currents, like Vgs,Vds...IDs and so on.

 (i always used to do that in free Spice software LTSpice, but i really want to know how could i do something like that in cadence?)

  • Hi Kabal

    You can do it as follows:

    a. In ADE-L, go to "Analysis->Choose"
    b. Select "dc" and enable "Save DC operating point"
    c. Run simulation
    d. Go to "Results->Print->DC operating point" and select any device
    e. Results will be displayed in a table

    Best regards
    Quek

  •  Ok, i chose to save DC operating point.

    But i didnt find  Results->Print->DC operating point  ?

     

    what i did is, i went to Schematics XL, then:

    ADE XL->Tools->Results Browser, 

     and then i can see it all.. Also, it turns out that i can run AC and DC analysis at same time, and see my AC response, and as well as DC op on all points.

      Thanks for the idea though.

  • You didn't mention you were using ADE-XL, so we have to guess how you're running the simulation.

    In ADE XL, over one of the outputs in the outputs pane - e.g. Nominal, or a corner, you can do Right Mouse->Print->DC Operating point - which is the same functionality as in ADE L.

    Andrew

  •  Yeah, sorry Andrew i forgot to mention about ADE XL.

    By the way, i tried the way you said and what happens is:

    I see the Results Display Window popping out quickly and then disappears in the back of the window (i.e. gets minimized), and when i click on that window on my pane, i see its Empty.

    Have no idea what that could be? Maybe a bug?

  •  When you do this, it should have opened the schematic in a tab, as well as opening the "Results Display Window". Initially the Results Display Window will be blank, but the schematic window should be prompting you to click on nodes (if it's for DC Node Voltages) or click on devices (if it's for DC Operating Point). Your window manager may be misconfigured and that may be what is preventing the window from appearing at the front (sometimes this is due to "focus stealing prevention behavior" in the window manager settings).

    So was there a prompt (such as "Select instances for the OP output...") in the bar at the bottom of the schematic window?

    Regards,

    Andrew.

  •  yeah, grea, thank you Andrew. I click on a device after that and it keeps adding info in the Results Window.But what is not convenient is the fact that i still have to scroll for each transistor,

     So i have 2 questions now:

     1) Is it possible to see the outputs in tabular form?

    For example, on the left i have long column: vgs, vds, vdssat .....etc. etc.

    And on the right there are columns with transistors TN0,TN1,TP0,TP1... and then at the same time i can see same parameters for each transistor?

     

    2) Is there any way to show the most important parameters (or the parameters which I want to choose) right on the schematic next to the transistors? For example, after i run the simulation, on the schematic near the transistors i can select which DC parameters to see?

     

    If #2 would be possible, it would be totally Awesome! So what do you think?

  • You can do control-A to select all the components in one go.

    You can also annotate the operating points to the schematic (use the Annotate menu in the same place as print), and also you can use the Edit Component Display form to change what parameters get annotated.

    This is well covered in the documentation, so I'd suggest you read that.

    Regards,

    Andrew.

  •  yes, i will go through docs.

    thanks alot Andrew, it worked, i appreciate!

  • Hello quek,
    I have saved DC operating point,and seen results in results->print->Dc operating point.
    I am using verilog ams and created test bench in schematic,to simulate a cell i have created a config view for test bench.I could do transient analysis for config view using ams simulator, but may i know how to plot resistance on y-axis versus voltage on x-axis curve using ams simulator in cadence (i.e. DC simulation plot for config view)

    Thank you in advance.

  • Hi Pandurangaiah

    As this thread has already ended in Mar 2012, would you please kindly create a new post for your issue? Please kindly review the forum rules.


    Best regards
    Quek

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.