Monolithic or multi-die integrated circuit transformer

A fully symmetrical and balanced monolithic or multi-die integrated circuit transformer device comprising:

• a first transformer, including:
• a symmetrical first bottom coil including electrically conductive crossovers between individual windings of pairs of adjacent windings, the first bottom coil including first and second differential terminals and also including a first center tap third terminal electrically connected to an inner-most winding of the first bottom coil;
• and
• a spiral first top coil, electrically connected to an encompassed first inner pad and a laterally offset first outer pad, the first top coil, the first inner pad, and the first outer pad including a shared first electrically conductive integrated circuit layer;
• and
• wherein the first top coil and the first bottom coil are overlaid and are separated from each other by an electrically insulating first dielectric layer;
• a second transformer, electrically in series with the first transformer, the second transformer including:
• a symmetrical second bottom coil including electrically conductive crossovers between individual windings of pairs of adjacent windings, the second bottom coil including third and fourth differential terminals and also including a second center tap third terminal electrically connected to an inner-most winding of the second bottom coil;
• and
• a spiral second top coil, electrically connected to an encompassed second inner pad and a laterally offset second outer pad, the second top coil, the second inner pad, and the second outer pad including a shared second electrically conductive integrated circuit layer;
• wherein the second top coil and the second bottom coil are overlaid and are separated from each other by the electrically insulating first dielectric layer;
• and
• a circuit component located below at least one of the bottom coil of the first transformer or the bottom coil of the second transformer.

A fully symmetrical and balanced monolithic or multi-die integrated circuit transformer device comprising:

• a first transformer, including:
• a symmetrical first bottom coil including electrically conductive crossovers between individual windings of pairs of adjacent windings, the first bottom coil including first and second differential terminals and also including a first center tap third terminal electrically connected to an inner-most winding of the first bottom coil;
• and
• a spiral first top coil, electrically connected to an encompassed first inner pad and a laterally offset first outer pad, the first top coil, the first inner pad, and the first outer pad including a shared first electrically conductive integrated circuit layer;
• and
• wherein the first top coil and the first bottom coil are overlaid and are separated from each other by an electrically insulating first dielectric layer;
• a second transformer, electrically in series with the first transformer, the second transformer including:
• a symmetrical second bottom coil including electrically conductive crossovers between individual windings of pairs of adjacent windings, the second bottom coil including third and fourth differential terminals and also including a second center tap third terminal electrically connected to an inner-most winding of the second bottom coil;
• and
• a spiral second top coil, electrically connected to an encompassed second inner pad and a laterally offset second outer pad, the second top coil, the second inner pad, and the second outer pad including a shared second electrically conductive integrated circuit layer;
• wherein the second top coil and the second bottom coil are overlaid and are separated from each other by the electrically insulating first dielectric layer;
• a third transformer, including:
• a symmetrical third bottom coil including electrically conductive crossovers between individual windings of pairs of adjacent windings, the third bottom coil including fifth and sixth differential terminals and also including a third center tap third terminal electrically connected to an inner-most winding of the third bottom coil;
• and
• a spiral third top coil, electrically connected to an encompassed third inner pad and a laterally offset third outer pad, the third top coil, the third inner pad, and the third outer pad including a shared third electrically conductive integrated circuit layer;
• and
• wherein the third top coil and the third bottom coil are overlaid and are separated from each other by an electrically insulating third dielectric layer;
• a fourth transformer, electrically in series with the third transformer, the fourth transformer including:
• a symmetrical fourth bottom coil including electrically conductive crossovers between individual windings of pairs of adjacent windings, the fourth bottom coil including seventh and eighth differential terminals and also including a fourth center tap third terminal electrically connected to an inner-most winding of the fourth bottom coil;
• and
• a spiral fourth top coil, electrically connected to an encompassed fourth inner pad and a laterally offset fourth outer pad, the fourth top coil, the fourth inner pad, and the fourth outer pad including a shared fourth electrically conductive integrated circuit layer;
• and
• wherein the fourth top coil and the fourth bottom coil are overlaid and are separated from each other by an electrically insulating fourth dielectric layer.