Editing Electrical network (section)

===Linearization around operating point===
When faced with a new circuit, the software first tries to find a [[Steady state|steady state solution]], that is, one where all nodes conform to Kirchhoff's current law ''and'' the voltages across and through each element of the circuit conform to the voltage/current equations governing that element.

Once the steady state solution is found, the ''[[operating point]]s'' of each element in the circuit are known.  For a small signal analysis, every non-linear element can be linearized around its operation point to obtain the small-signal estimate of the voltages and currents.  This is an application of Ohm's Law.  The resulting linear circuit matrix can be solved with [[Gaussian elimination]].