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Plotting gain vs potentiometer position?

Jonathan9420
Expert 2056 points
Other Parts Discussed in Thread: TINA-TI

It's possible to plot gain vs frequency as the pot position is varied, but is there a way to plot the gain of a circuit vs the Setting % of the pot?

  • 0
    TI__Mastermind 41310 points

    Jonathan9420,

    I do not think that you can do this with a percentage setting of the pot, however, you could do this using a swept resistance value. Replace the pot with a simple resistor and use the Select control object by clicking on the icon:

    When the mouse cursor changes, click on the resistor that you want to vary and then click on the ellipsis next to the resistor value. The another screen will appear:

    Choose the type of sweep you desire or use the list function. Remember, if you choose 100 cases, the simulation will be run 100 times, so choose your values wisely.

    The simulations will plot the same waveforms that were plotted for the single run of the circuit. Use the Legend feature to display all of the values for the simulations in the Diagram Window.

    Britt

  • 0 in reply to Britt Brooks - Online Design Tools
    Expert 2056 points

    You can do the same Control Object thing with the "Setting %" of the pot, but I don't want to make multiple frequency response plots at different settings, I would like to make a plot of gain on the Y axis and setting% on the X axis.

  • 0 in reply to Jonathan9420
    TI__Mastermind 41310 points

    Jonathan9420,

    I do not know of a way to do that in TINA-TI. Would you just pick a single frequency value? You can probably export the data from the Diagram Window and use Excel to re-format the data and plot it. You would have to get the swept parameter information from the diagram, however, since that value is not exported into the file. Also, pay attention to the order of the data exported. The output may not be in the swept order (1-10) as the 10th case showed before the first case in my simple test. You will have to take the log and multiply by 20 as well to convert to DB.

    To simplfy, you could reduce the number of frequency points, however, you must have a start and stop frequency, meaning that you would have a minimum of two points required.

    Britt

  • 0 in reply to Britt Brooks - Online Design Tools
    Expert 2056 points

    Do you know of other software that could do it?  I vaguely recall you could plot arbitrary things against each other in PSpice, but it's been a long time since I've used it.