Real-time circuitry simulation device for use as parallel digital logic to simulate e.g. power electronic circuit in hybrid car, has partial module defined by model, and correction matrix including values stored before simulation beginning

The device has a linear partial module defined by a discrete-time state space model through a transition matrix (Phi0), an input matrix (H0), an output matrix (C0) and a passage matrix (D0). A non-linear partial module is reversibly coupled by a variable conductance matrix (Gk) with an output variable (yk) of a state space model. A correction matrix includes values stored before beginning of simulation. A parallel calculation of output variables (yl, k) with a state variable in the sub-structure is implemented using a specific equation.