Pspice simulation

Discussion in 'Homework Help' started by JasonL, Apr 9, 2013.

  1. JasonL

    Thread Starter Active Member

    Jul 1, 2011
    47
    0
    I'm using version 9.2 for Orcad but I doubt it makes a huge difference for newer versions.
    The problem is attached.

    I am able to draw the schematic on pspice. I create an AC Sweep simulation with
    starting frequency: .01
    ending frequency:1,000,000
    Logarithmic Decade:100.

    I run the simulation and I can do part(a) easily because the resistor is connected to ground. I add trace DB(V(R1:1)). Plot a new y-axis and then add trace VP(V(R1:1)).

    My problem is, I don't know what the expression is for part(b) and part(c).

    Is VDB across the inductor,
    DB(V(L1:1) -V(L1:2))
    or is it
    [DB(V(1:1)) - DB(V(L1:2))]
    or am I doing everything wrong?
     
  2. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    657
    Think about what happens when you add (or subtract) the logs of two voltages.
     
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  3. JasonL

    Thread Starter Active Member

    Jul 1, 2011
    47
    0
    you will get the log of the two voltages divided if you subtract the log of two voltages.

    So, I think the correct traces should be
    DB[V(L1:1) - V(L1:2)]
    P[V(L1:1) - V(L1:2)]

    is this correct?
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    657
    Sounds good to me.:)
     
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