Patent ID: 8305182
Filing Date: 2012-11-06
Classification: H01F,H01L

Abstract:
1. A symmetric differential inductor structure disposed on a substrate, wherein the substrate is divided into a first quadrant, a second quadrant, a third quadrant and a fourth quadrant; a first input port is disposed in the second quadrant; a second input port is disposed in the first quadrant; and a third input port is disposed outside the first and second quadrants, the symmetric differential inductor structure comprising: a first spiral conductive wiring disposed in the second quadrant and having a first contact connected to the first input port and a first end disposed in the first spiral conductive wiring; a second spiral conductive wiring disposed in the first quadrant and having a second contact connected to the second input port and a second end disposed in the second spiral conductive wiring; a third spiral conductive wiring disposed in the fourth quadrant and having a third contact connected to the third input port and a third end disposed in the third spiral conductive wiring; a fourth spiral conductive wiring disposed in the third quadrant and having a fourth contact connected to the third input port and a fourth end disposed in the fourth spiral conductive wiring; a fifth conductive wiring disposed over the first and fourth spiral conductive wirings for connecting the first and fourth ends; and a sixth conductive wiring disposed over the second and third spiral conductive wirings for connecting the second and third ends.