Parabolic differential-algebraic models in electrical network design

In refined network analysis, a compact network model is combined with distributed models for semiconductor devices in a multidimensional approach. For linear RLC networks containing diodes as distributed devices, we construct a mathematical model that joins the differential-algebraic initial-value problem for the electric circuit with parabolic-elliptic boundary value problems modeling the diodes. For this mixed initial-boundary value problem of partial differential-algebraic equations a first existence and uniqueness result is given and its asymptotic behavior is discussed.