loose-electron wrote on Dec 4th, 2011, 12:27pm:.............
6. A "switch on" is not the only thing that will start a device to oscillate.
7. Sufficient loop gain, will take anything (noise, offsets, injected glitches due to a switch flip) and cause a repetitive amplification of that which builds in amplitude as an oscillation.
Loose-electron,
thanks for the very detailed information.
However, as already indicated in my question: I am aware that the switch-on effect is not the only cause to start oscillations. But I think the switch-on is the most important and the most reliable "kick", is it not?
And - coming back to the original core of discussion - I still think that in case of simulation problems (false or unexpected results) the user will be the only cause and not the simulation program.
I think the circuit as mentioned in one of my former postings (opamp with positive resistive feedback) can serve as a good example:
The simulation results are correct by 100% - based on the assumptions and conditions that exist during the simulation. Problems can arise only if the user transfer the results to real-world conditions (noise, stable supply, no switch-on,...).