Patent ID: 9007148
Filing Date: 2015-04-14
Classification: H03H,H04B

Abstract:
1. A common mode filter comprising: at least one common mode filter portion configured to remove a common mode noise, the at least one common mode filter portion having a first terminal pair configured to include first and second terminals connected to first and second external terminals, respectively, and having a second terminal pair configured to include third and fourth terminals connected to third and fourth external terminals, respectively; an inductor circuit including at least two inductors including a first and a second inductor that are connected in parallel to the first terminal pair of the at least one common mode filter portion and are connected in series to each other; a fifth external terminal connected to a connection point of the first and second inductors; a first capacitor inserted between the first external terminal and the first terminal of the at least one common mode filter portion; a second capacitor inserted between the second external terminal and the second terminal of the at least one common mode filter portion; a first discrete resistor inserted between the first terminal of the at least one common mode filter portion and one end of the first inductor or between the connection point of the first and second inductors and another end of the first inductor; and a second discrete resistor inserted between the second terminal of the at least one common mode filter portion and one end of the second inductor or between the connection point of the first and second inductors and another end of the second inductor, wherein the fifth external terminal is for being directly or indirectly grounded.