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I am quite new to PSPICE, and I am using Capture to design my circuit. To explain what I am trying to do, I have two circuits that I want to connect via a voltage in the following manner:

In circuit 1 I have a certain voltage, let us call it V1.

In circuit 2 I have a resistor (R1), with a value that I want to be dependent on V1. So that basically, R1 = f(V1), where f is a function. The function, f, is not necessarily linear.

Is there any easy way to do this in SPICE/PSPICE?

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Yep, there is a way to do this in pspice:

enter image description here

Or this way:

.SUBCKT RES_10K 1 2
ERES   1  3  VALUE = { I(VSENSE)*10K }
VSENSE 3  2  DC 0
.ENDS

Sources: E circuit center

Just a side note, this and other functions are accomplished much easier in LT spice, the package is free and I believe the solver is better and it's easier to use and accomplish special functions like this

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  • \$\begingroup\$ +1 for the LTspice reference. Some time ago I went to a friend and tried to use OrCad, the last time was in college. I found it very clunky compared to LTspice. Of course, it's just an opinion. \$\endgroup\$
    – a concerned citizen
    Commented Apr 6, 2018 at 6:08
  • \$\begingroup\$ It is difficult to use, and much more difficult when you want to do custom functions, you can simulate almost anything with B-sources including ADC's \$\endgroup\$
    – Voltage Spike ♦
    Commented Apr 6, 2018 at 15:26
  • \$\begingroup\$ I am quite new, so I am not able to implement the circuit above using OrCAD capture. The problem is setting the value of ERES to { I(VSENSE)*10k }, how do I do that. I have tried to double right click on the voltage value of ERES and write the expression, but that does not work. \$\endgroup\$
    – camzor00
    Commented Apr 9, 2018 at 13:33
  • \$\begingroup\$ Its been a while, but I believe this is done through the property editor. pspice.com/… \$\endgroup\$
    – Voltage Spike ♦
    Commented Apr 9, 2018 at 16:49

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