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Inconsistent initial conditions and/or Dirac impulses can appear in ne
tworks with ideal switches, and in such cases simulators may give wron
g results. To avoid errors, many simulators do not allow ideal switchi
ng, This paper presents simple CAD methods which can handle correctly,
and automatically, inconsistent initial conditions of linear as well
as nonlinear networks, For easy understanding, all explanations are do
ne on simple examples, with the minimum of mathematics.