Patent ID: 7750787

Claim:
An impedance transformer comprises: a single-ended winding having a plurality of winding components on a first set of layers of a plurality of layers of a supporting substrate, wherein each layer of the first set of layers supports two winding components of the plurality of winding components, and wherein the plurality of winding components are coupled in series; and a differential winding on at least one other layer of the plurality of layers, wherein the at least one other layer is interleaved with the first set of layers and the differential winding includes a composite substantially encircling geometric shape such that from a perpendicular perspective with respect to the plurality of layers, the differential winding overlays the plurality of winding components of the single-ended winding, wherein the single-ended winding has a first impedance within a desired frequency range and the differential winding has a second impedance within the desired frequency range, and wherein the first and second impedances are based on at least one of spacing, trace width, and trace length of the single-ended and differential windings.