Assign currents for each loop as I1, I2 and I3 and the power supplied by the source is 10*I1 as we can see from the circuit. As we know, the loop is used to compute the power supplied by the source. We will write a small piece of MATLAB code to compute all Loop. A loop is a non-linear circuit to implement the control of the input and output. A loop can be seen as an order of magnitude increase in both power density and switching frequency, which gives the great advantage of high power density (constant current) without requiring an additional inductor or capacitor.