Back when I was in semiconductors, we used a circuit simulator called SPICE.
It has enormous libraries of models for semiconductor components that you
can plug in. You can use it to do both small-signal and large-signal
analysis. Has no one ever come up with tube models for SPICE? It seems like
it would be really useful for testing some of our ideas. With today's PCs,
large-signal nonlinear simulations would seem quite feasible.
Carl WS7L
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