Integrated Spiral Inductors

No. turns, n =    Turn spacing, s = µm
Turn width, w = µm Outer diameter, dout = µm

Modified Wheeler nH nH nH
Current Sheet nH nH nH
Monomial Fit nH nH nH

Reference:
S.S. Mohan, M. Hershenson, S.P. Boyd and T.H. Lee, "Simple Accurate Expressions for Planar Spiral Inductances, "IEEE Journal of Solid-State Circuits, Oct. 1999, pp. 1419-24.