Patent ID: 8188806
Filing Date: 2012-05-29
Classification: H03H,H03J

Abstract:
1. A tuner, comprising: a tuner integrated circuit; and an impedance matching circuit, comprising: a transformer, comprising: a first winding, having a first end and a second end; and a second winding, having a third end and a fourth end, wherein the first winding and the second winding are formed by conducting wire of a printed circuit board, the printed circuit board comprises at least a first conductor layer and a second conductor layer, a part of the first winding is formed by the first conductor layer, another part of the first winding is formed by the second conductor layer, a part of the second winding is formed by the first conductor layer, the other part of the second winding is formed by the second conductor layer, and the first conductor layer and the second conductor layer are connected by vias, wherein winding directions of the first winding and the second winding are substantially perpendicular to an arrangement direction of the first conductor layer and the second conductor layer, and a projection of the first winding on the first conductor layer and a projection of the second winding on the first conductor layer are not overlapped; a first matching circuit, coupled to the first end and the second end; and a second matching circuit, coupled to the third end and the fourth end.