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Hi,

In my circuit "Problem with Simulation", as soon as I connect R6 to R7, V1 Square Generator stops oscillating.

I expected this circuit to work as a Smith Trigger, depending on Value of R2.

Best Thanks for your Ideas. Alexandre

and here is the Schematic:

I tried using the TL082 CL model but that gave the same crazy result as the LM358.

I think there's a rather bizarre problem with the CL opamp model because if I replace it with a very simple behavioural opamp model then the circuit all works fine!

Hi,

Thanks for this. No it seems to work like it should.

Best Regards,

Be aware that the behavioural opamp model is very basic. It has a fixed 0 to +24V output.

Thanks, fixed 0-24V Output is what I needed.

Yep, I played with this simple circuit and it sure acts funny. I changed it a bit to try to better demo the schmitt action, but no joy. As soon as you add the feedback resistor the sim slows to a crawl and the output makes no sense: