Planar coil and planar transformer

Details Planar coil and planar transformer Planar coil and planar transformer

2005-01-25

2005-01-25

Donovan, Lincoln (Department: 2832)

Inductor devices

Windings

Having conductor of particular shape

C336S200000, C336S232000, C336S192000, C336S083000

Reexamination Certificate

active

06847284

ABSTRACT:
A planar coil includes a winding of N turns (N is an integer greater than or equal to 2). Letting ri(n) be a radius of an inner circumference of a winding portion at the nthturn (n is an integer greater than or equal to 1 and less than or equal to N) from the inner side; ro(n) be a radius of an outer circumference of the same; rminbe a radius of an inner circumference of the innermost winding portion; Wtotalbe a difference between a radius of an outer circumference of the outermost winding portion and the radius of the inner circumference of the innermost winding portion; and D be a distance between winding portions at adjacent turns, the ri(n) and ro(n) are determined so as to minimize a value of A expressed by equation (1) when the rmin, Wtotlaand D are given.A=∑n=1N⁢(log⁢ro⁡(n)ri⁡(n))-1(1)

REFERENCES:
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patent: A 2001-85230 (2001-03-01), None
patent: 2001-85230 (2001-03-01), None

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