HIGH EFFICIENCY ON-CHIP 3D TRANSFORMER STRUCTURE

摘要

An integrated circuit transformer structure includes at least two conductor groups stacked in parallel in different layers. A first spiral track is formed in the at least two conductor groups, the first spiral track includes first turns of a first radius within each of the at least two conductor groups, and second turns of a second radius within each of the at least two conductor groups, the first and second turns being electrically connected. A second spiral track is formed in the at least two conductor groups, the second spiral track including a plurality of adjacent turns of one or more radii within each of the at least two conductor groups and disposed in a same plane between the first and second turns in each of the at least two conductor groups.

主权项

1. An integrated circuit transformer structure, comprising:
at least two conductor groups, each conductor group forming a spiral, the spirals of the at least two conductor groups being stacked in parallel in different layers; the spirals including: turns of a first radius connected in series between the layers to form a first cylinder of turns within the at least two conductor groups; turns of a second radius connected in series between the layers to form a second cylinder of turns within the at least two conductor groups; and turns of a third radius connected in series between the layers to form a third cylinder of turns within the at least two conductor groups, wherein the first and the third cylinder are electrically connected to each other and electrically isolated from the second cylinder, the second cylinder including a plurality of adjacent turns of one or more radii in each of the at least two conductor groups and disposed in a same plane between turns of the first and third cylinders in each of the at least two conductor groups.