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I have the following circuit and I want to varry V1 from 24V to 0v while keeping V2 = 5V, naturally I tried using DC sweep simulation with start value of 24V, end value of 0V and variation of -1, but that gave a variation from 0V to 24V, I've tried changing the variation to 1, that gave the same results.

So my question is : how can I make DC sweep simulation with negative variation? I am using pspice with orcad 16.4

enter image description here

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  • \$\begingroup\$ How can you tell which order the sweep was done? If you're just looking at a graph, of course 0 V is still on the left of the x-axis and 24 V is on the right, even if the sweep was done the other way. \$\endgroup\$ – The Photon May 21 '17 at 19:14
  • \$\begingroup\$ @ThePhoton I deduced from the current curve, since I'm using a thyristor it should switch to off once the current goes below the holding current (At 24v it's already turned on) \$\endgroup\$ – Ernest Dujo May 25 '17 at 11:14
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Try varying voltage V1 in Eg: -10 to 24 with the increment of 1. Since there is a increment it should always be increasing. This will increment form -10 in step of 1 till 24. Simulation Settings

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