Patent ID: 7570144

Claim:
An integrated transformer structure, comprising: a first coil element associated with a transverse axis, wherein the transverse axis is generally normal to at least first and second lateral levels mutually spaced apart along the transverse axis, the first coil element having at least one turn, the first coil element comprising a first portion provided on the first lateral level, and a second portion provided on the second lateral level, the first and second portions being displaced laterally from the axis by different respective distances; and at least one crossover element of the first coil element, the crossover element is disposed between the first and second lateral levels, wherein the crossover element is in a crossover plane which is parallel to planes of the first and second lateral levels, wherein the first coil element is configured to provide a conducting path through the first portion of the first coil element, through the crossover element and through the second portion of the first coil element, in which any change of flow direction along the path is less than 90° in a lateral direction.