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PCB平面线圈电感值在线计算工具

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Single layer Planar spiral coil inductor calculator
Octagon spiral coil Hexagon spiral coil Square spiral coil Sircular spiral coil


The first approximation is based on a modification of an expression developed by Wheeler; the second is derived from electromagnetic principles by approximating the sides of the spirals as current-sheets; and the third is a monomial expression derived from fitting to a large database of inductors (and the exact inductance values).
All three expressions are accurate, with typical errors of 2 - 3%, and very simple, and are therefore excellent candidates for use in design and synthesis.The thickness of the inductor has only a very small effect on inductance and will therefore be ignored.

Number of turns (n): turns
Spacing between turns (s): um
Turn width (w): um
Outer Diameter (dout): um
Calculated Inner diameter um
Fill factor p=(Dout-Din)/(Dout+Din)
  Square Hexagonal Octagonal Circular
Modified Wheeler nH nH nH nH
Current Sheet nH nH nH nH
Monomial Fit nH 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.
For multilayer spiral pcb coils see her:A new calculation for designing multilayer planar spiral inductors

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