Pspice simulation

Discussion in 'Electronics Resources' started by Logan4el, Nov 5, 2013.

  1. Logan4el

    Logan4el Thread Starter New Member

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    Hello, I have set a signal with the VPWL. I am using voltmeter to see what kind of signal I have set up in VPWL.

    If I am adding a 10k resistor under VPWL source, it is changing my signal which comes from VPWL source.

    Could somebody explain me why it is happening? If I change any other parts they dont affect my VPWL source.

    [​IMG]

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  2. MikeML

    MikeML Senior Member

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    Ohms law and Kirchoff. E=IR. The current that flows in the 10K resistor(pot) subtracts from the source voltage.

    Hint, it is called an IR drop.
  3. Logan4el

    Logan4el Thread Starter New Member

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    Just moved a ground to the correct place and everything is fine now.
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