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Really Simple PSPICE simulation, need somebody to double check me

  1. Mar 14, 2012 #1
    Hi,

    I am working on a prelab for my electronics laboratory course. It's really simple (or at least should be. Basically he wants us to simulate the I-V characteristics of a D1N4002 diode. There is no resistor in the circuit we are to simulate (basically we're shorting it if you consider the resistance of the diode negligible). The circuit is below:

    29uvgjo.png

    My problem is that whenever I simulate it, I get something that looks rather linear rather than exponentially increasing after the turn-on voltage like it should. I am doing a DC sweep from 0 to 5V with .1 increment and linear scale. No clue what I'm doing wrong here. Thanks
     
  2. jcsd
  3. Mar 14, 2012 #2

    vk6kro

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    Science Advisor

    Try sweeping from 0 to 0.8 volts and in steps of 0.01 volts.

    The program will try to fit the data onto the graph and because the current gets enormous above 1 volt, the curve of the diode characteristic, as it turns on, gets lost.
     
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