![]() Convenient in the above case but a trap for the unwary. In Spice you can exceed SOA limits with out penaty. A good example is finding the most appropriate resistor value(s) in a VI-limiting circuit. If you have a functioning amp and want to predict the effect of incrementally changing a component value Spice can be a time saver then hand calculating is tediouis or error prone. Spice treats power rails as having unlimited current available. ![]() With regard to active devices, Spice models seem to do a better job predicting voltages than currents - perhaps this is because the min-max range of beta for real-world BJT's is so broad. If it works in simulation, chances are good but not certain it will work in real life. If doesn't work in simulation, it will rarely work in real life. A few examples from my experience, which may not be consistent with that of more skilled (intelligent?) users. ![]() Sometimes very accurate and sometimes not even close. I agree with the comments above that the accuracy of the individual models is very important.Īs for how accurate Spice is for power amps, the answer is complicated. ![]() First a question: Which version of EWB and what price - on their website I only saw pricing for the student versions? I'm just curious.
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