1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Circuit analysis with pspice

  1. Oct 31, 2013 #1
    Hello i need to show with pspice plot the point-contact of diode.
    this is the circuit and the values i need:

    the right solution should look like this plot

    but this is the plot i see


    thx in advance!
  2. jcsd
  3. Oct 31, 2013 #2


    User Avatar

    Staff: Mentor

    I'm not too familiar with PSpice's equation plotting details, but I do notice that there is a difference in the format of the expressions that your diagrams show. Do you need the parentheses to make the order of operations clear?


    Attached Files:

  4. Oct 31, 2013 #3
    im aware to this difference its not the case thx..
  5. Oct 31, 2013 #4


    User Avatar

    Staff: Mentor

    Okay. I noticed something else... The "good" plot has V(D1:1) on the x-axis. Your plot has V_V1. Presumably that means the good plot is plotting the other quantities against the diode junction voltage, whereas yours is plotting against the swept source voltage value.

    You need to figure out how to place the diode voltage on the x-axis of your plot.
  6. Nov 1, 2013 #5
    looks like you right!
  7. Nov 1, 2013 #6
    yea, the man is right you just need to change your x-variable... go to plot->axis settings->x axis->axis variable and put v(d1:1).
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted