Hi Keith,
I have read the article. Thanks for it.
It however does not mention of the layout implementation of the multilayer inductor.
I would assume in the 4 layer spiral implementation, top layer (1) and 3rd layer (3) would be clockwise winding, and second (2) & bottom (4) layer would be counterclockwise winding because of the vias.
I find it surprising that no many articles in regards to this. I am not sure if these formula's on have been verified by others.
I will give it a try.
Any simulation tools that can do this that anybody can recommend prior to me making the PCB?