Patent ID: 7751790

Claim:
A hybrid on-chip-off-chip transformer comprising: an off-chip winding section coupled to produce a first electromagnetic signal from a reference source; and an on-chip winding section coupled to derive a second electromagnetic signal from the first electromagnetic signal when the on-chip winding section is within a proximal coupling distance of the off-chip winding section, in which the on-chip winding section is integrated on a multiple layer integrated circuit (IC) die that also contains integrated circuitry to respond to the second electromagnetic signal; the on-chip winding section including a first plurality of multiple turn coils on a first layer of the multiple layer IC die, wherein the proximal coupling distance provides a substantially perpendicular, with respect to the first layer of the multiple layer IC die, electromagnetic field of the first electromagnetic signal to the first plurality of multiple turn coils and a second plurality of multiple turn coils on a second layer of the multiple layer IC die, wherein the proximal coupling distance provides a substantially perpendicular, with respect to the second layer of the multiple layer IC die, electromagnetic field of the first electromagnetic signal to the second plurality of multiple turn coils, in which the first and second pluralities of multiple turn coils provide the second electromagnetic signal.