failure analysis of diode

I tried to design a problem for the analysis of the student - and tried two diodes in parallel - but with resistance

above and below of one of the diodes (diode therefore is not potential ground on each side).

Multisim failed to produce a DC solution.

LTSpice worked well.

Then... How Multisim to produce good results?

Oh my! I don't see that.

I know what your problem is. The two sons that you named N3 and N4 to LTSpice are all two appointed 2 in Multisim. These two wires will be behave as if they are connected. We call this a virtual connection. To see the name of the net, double click on the wire. I also recommend that you put on the visibility of all the names of net for debugging:

  1. Click Options > properties sheet
  2. In the Circuit tab, click Show all in the net option box

You're not the first person to be victims of this behavior is not so obvious. We addressed this issue in our last version, Multisim 11. Virtually connected nets are explicitly designed with connectors now and it's much more difficult to police this kind of problem.

In the meantime, if you don't want to upgrade to Multisim 11, it is worth your while to upgrade your Multisim at 10.1.0.1. There was a bug in 10.1, which fixed us for 10.1.0.1 which could cause this strange behavior. The 10.1.0.1 update is available free of charge via OR Update Service.

Hope that helps.

Tags: NI Software

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