Patent ID: 9729123
Date: 2017-08-08
CPC Classifications: H03H

Claim:
1. A common-mode filter, comprising: a first transmission line; a second transmission line; a first wiring layer comprising a first conductive capacitor plate, wherein at least a part of the first transmission line is located in the first wiring layer, and the first transmission line is electrically coupled with the first conductive capacitor plate; a second wiring layer comprising a second conductive plate and a first inductor, the second conductive capacitor plate being electrically coupled with the first inductor; and a third wiring layer comprising a third conductive capacitor plate, wherein at least a part of the second transmission line is located in the second wiring layer, and the second transmission line is electrically coupled with the third conductive capacitor plate; wherein at least a part of the first conductive capacitor plate faces the second conductive capacitor plate, and at least a part of the second conductive capacitor plate faces the third conductive capacitor plate.