Integrated circuit inductors
AssigneeNXP B. V.
InventorAlexe Nazarian
Life of this patent
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Abstract
In order to reduce the inter-path capacitance of an inductor, an integrated circuit inductor design is provided in which the path crossings are designed such that the voltage differences between the adjacent paths in the loops are (in total) minimised.
Claims13
An inductor comprising a conducting track arranged in loops, each loop comprising at least two concentric paths, wherein the track length comprises tap regions at the ends of the tracks and a central track region which comprises the concentric paths of the loops, wherein the central track region comprises a sequence of track sections, each comprising a loop half turn, and crossings between tracks sections, with the crossings spaced along the central track region by one or two track sections, wherein the central track section has a parameter p defined as:
- p=the sum of squares of normalised differences in track section sequence number for all adjacent pairs of track sections in each loop,
- wherein the path crossings are at locations such that the parameter p is the minimum possible value of p.
A method of designing the layout of an inductor comprising a conducting track arranged in loops, each loop comprising at least two concentric paths, wherein the track length comprises tap regions at the ends of the tracks and a central track region which comprises the concentric paths of the loops, wherein the central track region comprises a sequence of track sections, each comprising a loop half turn, and crossings between tracks sections, with the crossings spaced along the central track region by one or two track sections,
- wherein the method comprises defining a parameter p:
- p=the sum of squares of normalised differences in track section sequence number for all adjacent pairs of track sections in each loop;
- and
- selecting the path crossings at locations such that the parameter p is the minimum possible value of p.
Dependencies are inferred from the claim text.