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How does Spice think?
Youâre an engineer. Spice doesn't think like you think.
Spice was written by a group of Professors and grad students at the University of California, Berkeley, over 45 years ago. So it thinks like most of your college professors did - it likes theory and ignores reality.
It simulates by solving matrixes of circuit equations. Circuit equations use ideal electrical elements: resistance, capacitance, inductance. Things we can't buy.
So it follows that we need to go back to college thinking to understand Spice. And that Spice depends totally on us to interpret the physical world into its theoretical world. This process is called modeling your circuit for simulation.