Patent ID: 8358192

Claim:
A symmetrical inductor, comprising: a plurality of conductive layers; a first loop disposed in an upper layer of the conductive layers; a second loop disposed in the upper layer; a third loop that includes a first half-loop and a second half-loop, wherein: the first half-loop includes a first half-loop portion in a first layer below the upper layer and a second half-loop portion in a second layer below the first layer, and first ends of the first and second half-loop portions are connected to a first end of the first loop; and the second half-loop includes a third half-loop portion in the first layer and a fourth half-loop portion in the second layer, and first ends of the third and fourth half-loop portions are connected to a first end of the second loop; a first terminal electrode coupled to a second end of the first loop; a second terminal electrode coupled to a second end of the second loop; and a center-tap electrode connected to second ends of the first and second half-loop portions and connected to second ends of the third and fourth half-loop portions.