公开(公告)号：US20220406288A1

公开(公告)日：2022-12-22

申请号：US17353420

申请日：2021-06-21

Applicant: QUALCOMM Incorporated

Inventor： Kai LIU ,  Chunhu ZHANG ,  Chenliang DU

IPC: G10K11/36 ,  H03H7/01 ,  H03H9/02 ,  H03H9/64

Abstract: Disclosed is a radio frequency (RF) filter that vertically integrates an acoustic wave filter with an integrated passive device (IPD) filter. The acoustic wave filter provides selectivity at fundamental frequency band while the IPD filter provides rejection at harmonic frequency bands.

公开(公告)号：US20240429907A1

公开(公告)日：2024-12-26

申请号：US18338685

申请日：2023-06-21

Applicant: QUALCOMM Incorporated

Inventor： Lei MA ,  Chenliang DU ,  Antonino SCUDERI

IPC: H03K5/08 ,  H03K5/02

Abstract: Certain aspects of the present disclosure are directed towards a signal processing circuit. The signal processing circuit generally includes: an impedance transformation circuit coupled between a first node and a second node; and an attenuation circuit including a first variable resistive element coupled between the first node and a reference potential node, and a second variable resistive element coupled between the second node and the reference potential node.