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It's not the model that's missing, it the symbol: IR2110.asy. -- Regards, Tony

Please read carefully.? You did not upload the SYMBOL file, which is *IR2110.asy*.? That file is missing from the .zip that you uploaded.? Having the model file does no good when the symbol file

No you can't use the normal op-amp symbol directly, because of that extra pin.? The normal op-amp symbol is "opamp2", and it works for the majority of op-amps.? But not this one. Here is something

Yes, you can take a standard symbol, edit the attributes, and save it as a "new" *.asy file. Easy peasy.

The model is obviously seriously wrong. I really can't see why a simple formula Rhot = Rcold*(1 +aT + bT^2)? could not be used. That can't possibly 'blow up'. T = Thot - Tcold.

Hi Andy! I am still checking this thread. I did include *IR2110.sub* in the zip file. I just downloaded my zip, extracted it to a folder and was able to run the simulation without any issues. You are

Hmm.? Define "zero ohms".? :-) The current through the G-source can become zero, which it does when the voltage across it is zero.? It isn't zero ohms in that case. I suppose it could become zero

I see; the notation is confusing. But is the synthetic resistor then allowed to be zero ohms? -- This email has been checked for viruses by AVG antivirus software. www.avg.com

Hello, In ltspice there are many modles and I like to use the standart symbols to represent the model. When I create model from a netlist at worst I use a recrangle with pins? and at best I try to

Carlo, In your latest uploaded file (12AU7heater.zip), try this:? Plot V(n001)/I(I1), which shows the effective resistance of the Heater.? Change the .DC sweep past 160m, to 200m.? (.dc I1 120m

Ah ok. The point is that, by removing both the independent current source I1 and the G-source Ghot from the overall topology, the topology check realizes that there is the series/string of R:U1:cool

If you're interested, I have a new tool, which is somewhat faster than the Analyser you mentioned and just as accurate. I don't know for sure whether using (maximum) timesteps of binary fractions of

It is in the numerator. There are no parentheses around " (42 - 6.2)*v(u1:hb,0) ".? Only " (42 - 6.2) " is in the denominator. Andy

I think you are confused about nodenames. There is no U1:H2 node. U1:H2 is a portion of the names of elements R:U1:H2 and C:U1:H2.? There is nothing named U1:H2, neither a node nor an element. In the

The term v(u1:hb,0) is in the denominator of the function and I think it is zero at startup.

Hmm.? That is a necessary requirement to get anything resembling the right frequency in the simulated waveforms.? But it does not get you a good spectrum from which you can estimate distortion.?

In my opinion, those are good choices.? I prefer to keep the timestep smaller than 1% of the period, and sometimes I make it 0.1% or smaller.? It depends on how low I want the artifacts to be, and

The function for G appears to have a divide by zero term at startup.

Looking at the complete circuit topology, U1:H2 node is the node where the subckt G-source Ghot joins the external DC independent current source (I1). In the overall circuit this U1:H2 node is

Time step: Set to half (or less) the period of the highest harmonic you are interested in. Interval: The longer you make it, the lower is the frequency that appears as the fundamental, and the