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#1
11-05-2013, 09:08 PM
 Logan4el New Member Join Date: Nov 2013 Posts: 2
Pspice simulation

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.

#2
11-05-2013, 09:46 PM
 MikeML Senior Member Join Date: Oct 2009 Location: AZ27 Posts: 1,539

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.
__________________
Mike ML.

I am an engineer and academic. When I talk about current it flows from positive to negative.
#3
11-05-2013, 11:02 PM
 Logan4el New Member Join Date: Nov 2013 Posts: 2

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

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