公开(公告)号：US20200266791A1

公开(公告)日：2020-08-20

申请号：US16275574

申请日：2019-02-14

Applicant: QUALCOMM Incorporated

Inventor： Haitao CHENG ,  Yanming XIAO ,  Wu-Hsin CHEN ,  Li LIU ,  Masoud MOSLEHI BAJESTAN

IPC: H03H7/01

Abstract: A low-pass filter having a notch frequency due to a resonance between a mutual inductance of inductive elements and a capacitance. An exemplary low-pass filter generally includes a first inductive element having a first terminal and a second terminal, the first terminal being coupled to the input port, and a second inductive element having a first terminal and a second terminal, the first terminal of the second inductive element being coupled to the second terminal of the first inductive element and the second terminal of the second inductive element being coupled to the output port. The filter also includes a shunt capacitive element coupled to the second terminal of the first inductive element, wherein a mutual inductance between the first inductive element and the second inductive element and a capacitance of the shunt capacitive element are configured to have a resonance providing a notch frequency for the low-pass filter.

公开(公告)号：US20180175806A1

公开(公告)日：2018-06-21

申请号：US15583636

申请日：2017-05-01

Applicant: QUALCOMM Incorporated

Inventor： Mohammad Sadegh MEHRJOO ,  Chuan WANG ,  Yanming XIAO ,  Li-chung CHANG ,  Kevin Hsi Huai WANG

IPC: H03F1/32 ,  H03F3/193

CPC classification number: H03F1/3205 ,  H03F1/223 ,  H03F3/193 ,  H03F3/211 ,  H03F3/245 ,  H03F2200/105 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2200/541

Abstract: A low noise amplifier may include a post distortion cancellation block coupled to the low noise amplifier. The post distortion cancellation block may include a diode, and phase-shift logic. The phase-shift logic may be coupled in series with the diode.