Node Equations

The node equations are shown to be Kirchhoff´s current equations expressed in terms of circuit admittances and voltages from all network junctions or nodes to the reference node (node at which a current equation is not written). A method of writing these node equations directly from a network is presented. This method is given in such a form that it applies to any network, even though mutual magnetic induction, regulated generator voltages, and given input currents are included.