V-I characteristics of Diode (Sweep analysis)

Schematic Simulation (Ngspice)
1

Hello guys,

I am trying to simulate the I-V characteristics using sweep analysis, unfortunately I can’t change the horizontal axis from the source voltage to the diode voltage, could I ask you for help?

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Thank you

2

Not a spice user but what you want (I think) is a I, V characteristic i.e. voltage as a function of current.

I would remove R1 and make V1 into a current source.

3

It makes sense, unfortunately it doesn’t work, but thanks for the effort :slight_smile:

I would still prefer to have the voltage on the diode as a variable.

4

Its been a long time but I think your sweep analysis assumes a linear function for the diode (not sure).

5

This feature is not (yet?) supported by the KiCads-ngspice interface.

You might want to create an issue (to be put on the wishlist) at Issues · KiCad / KiCad Source Code / kicad · GitLab.

6

OK, thank you for information and thank you for your´s simulation tutorials.

7

I have created ab issue at Simulation: Allow plotting of data versus another solution vector (including user defined signals) (#17822) · Issues · KiCad / KiCad Source Code / kicad · GitLab .

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