Electronics > Beginners

What am I doing wrong in ltspice?

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Wimberleytech:
For whatever reason, it does not like the I(R1) expression.  Use a voltage source with zero volts instead.

<<update>>
It converges if there is no multiplier while using I(R1).
I have increased the iteration limit to 3000 (with gain of 100) and it still does not converge.
Hmmmmm...

iMo:
Try with current controlled current source.
F1 is the CCCS, controlled by the current flowing via V2, the gain=100.

Wimberleytech:

--- Quote from: imo on February 13, 2020, 07:16:52 pm ---Try with current controlled current source.
F1 is the CCCS, controlled by the current flowing via V2, the gain=100.

--- End quote ---

I concur.  The CCCS worked for me as well.  I suspect that a current source with the directive I=I(V1)*100 will instantiate in the matrix just like and F element would.

I am still puzzled why the original post does not work.

iMo:
@Wimberleytech: But you have got a typo in your schematics - the current is I(V2)*100.
I think the F converts differently..

Wimberleytech:

--- Quote from: imo on February 13, 2020, 08:28:23 pm ---@Wimberleytech: But you have got a typo in your schematics - the current is I(V2)*100.
I think the F converts differently..

--- End quote ---
|O oops you are right.  It still converges once I change it to V2.

As far as how the matrix is instantiated...that was just a guess, but an educated one.

When I run them together I get exactly the same result.

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