公开(公告)号：US20190238110A1

公开(公告)日：2019-08-01

申请号：US16258883

申请日：2019-01-28

Applicant: STMicroelectronics (Tours) SAS

Inventor： Joel CONCORD

IPC: H03H7/42 ,  H01P1/20 ,  H03H7/09 ,  H03H7/01

CPC classification number: H03H7/427 ,  H01P1/2007 ,  H01P1/203 ,  H01P1/20381 ,  H01P1/2039 ,  H03H7/09 ,  H03H7/17

Abstract: A filtering circuit includes at least two common-mode filters that are electrically coupled in series and magnetically coupled. The first common-mode filter includes first and second spiral inductors that are positively magnetically coupled and electrically isolated from each other. The second common-mode filter includes third and fourth spiral inductors that are positively magnetically coupled and electrically isolated from each other. The first and third spiral inductors are electrically connected in series and negatively magnetically coupled. Likewise, the second and fourth spiral inductors are electrically connected in series and negatively magnetically coupled.