3. If the circuit contains only current sources, apply Kirchhoff 's current law at each non-reference node. to obtain the conductance matrix if a circuit has only independent current sources, equate the total current leaving each node through all conductance to the total source current entering that node, and order the terms from v, to VN-1. For each dependent current source present, relate the source current and the controlling quantity to the variables vi, v2,..., VN-1, if they are not already in that form3. If the circuit contains only current sources, apply Kirchhoff 's current law at each non-reference node. To obtain the conductance matrix if a circuit has only independent current sources, equate the total current leaving each node through all conductance to the total source current entering that node, and order the terms from v1 to vN-1. For each dependent current source present, relate the source current and the controlling quantity to the variables v1 , v2 ,…,vN -1 , if they are not already in that form