公开(公告)号：US11909368B2

公开(公告)日：2024-02-20

申请号：US17467494

申请日：2021-09-07

Applicant: QUALCOMM INCORPORATED

Inventor： Kai Zhan ,  Chinmaya Mishra

IPC: H03H11/04 ,  H03F3/24 ,  H04B1/04

CPC classification number: H03H11/04 ,  H03F3/245 ,  H04B1/04 ,  H03F2200/451 ,  H03H2011/0488

Abstract: A dual mode notch filter for use in a multi-band millimeter wave (mmW) transmitter includes a transmit filter circuit disposed between two amplifiers in a mmW transmit signal path, the transmit filter circuit formed by at least one switch, at least one capacitor, and a double-tuned transformer, the transmit filter circuit having at least two modes configured to selectively filter a spurious signal in at least a first communication band.