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You're right about that. Andy

Well, there may be one caveat.? If I remember correctly, Mike Engelhardt said that parameter values do not descend infinitely far down into their subcircuits, like you think they ought to.? I think

It's been discussed and argued, and stated by Analog Devices's experts with the LTspice code, that LTspice should be entirely deterministic, with no randomness in simulations unless the user actually

Ok, by "bias voltages" you mean actually the mean value of the voltages averaged for instance over a time period of the source signal (e.g. averaged over a 1ms interval for a 1Khz source signal). Near

It should be obvious, but due to a typo, it might not be - it should have been: I don't believe that LTspice 24.1 should have complained, if VCC was assigned in the top-level schematic. -- Regards,

I don't believe that LTspice 24.1 shouldn't have complained, if VCC was assigned in the top-level schematic. It is not re-defined anywhere in the 74LVC1G library. That being so, it is perfectly legal

I thought I suggested small differences in (a) settings or (b) algorithms.? I do not suggest gremlins in the computer!? :-) Andy

Do you mean your .TRAN ITS solution (i.e. DC operating point) step returns 26V @ -166mA on the heater's pins ? A different timestep employed by .TRAN card for transient analysis can't explain that

(netlist code deleted for brevity) Yes, that is the heater's model.? But there is also a "connection" from inside that netlist code, to the triode.? Presumably, that connection brings the heater's

What I mean is, what do the steady-state DC voltages look like, and are they correct or incorrect for your circuit?? I was not referring to the INITIAL voltages at the start of the transient

That's exactly what happens. Nothing was changed.

Well, I have not much to tell. The simulation worked right from day one, with 5.8V on the heater. However, just right now, running the simulation gave the same erroneous results as mentioned by many,

This was never the case. "VCC" is the required top level parameter in 74LVC1G, just as with 74HC and 74HCT etc.. If it is not set, LTspice (all versions) will set an error. If a top level parameter is

Sorry, could you be more specific about your viable solution of .TRAN analysis (without UIC or Startup flag) ? I'm referring in particular to the ITS (aka DC operating point) solution (e.g. the DC

If you do this, could you ensure that all the changes are logged in the header of the library, so I can keep track of everything. Thanks. -- Regards, Tony

This has always worked. The keyword "WHEN" is always associated with the x-axis value. In .AC it is Hertz. In .TRAN it is time. "FIND <something>" should only really be used when <something> is

I have no problem understanding the possible multiple equilibrium possibilities. My question was why does my installation succeeds everytime in finding a viable solution when it seems all others have

This is not what "UIC" means or does. If you just want to start the DC sources at zero, use the "startup" switch instead. -- Regards, Tony

The advantage of the 0V voltage source method is that it can easily be used in the argument of B-sources. -- Regards, Tony

It might not be the "right" word, but as you say, there might not be another that exactly describes the process. "Re-entrant" is another word that is used for similar things. OED: