Planar transformer with bridge passive device

An apparatus comprising:

• a substrate;
• a coil below a surface of the substrate, the coil having first and second ends, and a center tap between the first and second ends, the center tap being coupled to a ground terminal;
• a semiconductor die on the surface of the substrate;
• a first passive component on the surface of the substrate and coupled between the first end and the semiconductor die, the first passive component overlapping at least a part of the coil;
• and
• a second passive component on the surface of the substrate and coupled between the second end and the semiconductor die, the second passive component overlapping at least a part of the coil.

An apparatus comprising:

• a substrate;
• a coil below a surface of the substrate, the coil having first and second ends;
• a semiconductor die on the surface of the substrate;
• and
• a capacitor on the surface of the substrate and coupled between the first end and the semiconductor die, the semiconductor die coupled to the second end via a metal interconnect in the substrate, the capacitor overlapping at least a part of the coil.