公开(公告)号：US10979002B2

公开(公告)日：2021-04-13

申请号：US16031834

申请日：2018-07-10

Applicant: QUALCOMM Incorporated

Inventor： Jing-Hwa Chen ,  Jisun Ryu ,  Yan Kit Gary Hau ,  Yanjie Sun ,  Xinwei Wang ,  Xiangdong Zhang

IPC: H03F1/52 ,  H03F3/191 ,  H03F1/30 ,  H03F3/24 ,  H03F1/32 ,  G05F3/22 ,  H03F1/02 ,  H03F3/21

Abstract: Certain aspects of the present disclosure provide methods and apparatus for current-limiting protection of an amplifier, such as a power amplifier in a radio frequency (RF) front-end. One example current-limiting circuit generally includes a node coupled to a current source, a plurality of current-sinking devices coupled to the node, one or more switches coupled between the node and at least one of the plurality of current-sinking devices, and a bias circuit having an input coupled to the node and an output for coupling to an input of the amplifier.

公开(公告)号：US11323079B2

公开(公告)日：2022-05-03

申请号：US16804929

申请日：2020-02-28

Applicant: QUALCOMM Incorporated

Inventor： Jing-Hwa Chen ,  Junzhi Yu ,  Yan Kit Gary Hau ,  Guoqing Fu ,  Xinwei Wang ,  Xiangdong Zhang

IPC: H03F3/191 ,  H03F1/56 ,  H03F3/24 ,  H03F1/02 ,  H03F3/60 ,  H03F3/195

Abstract: Certain aspects of the present disclosure are directed to an amplifier. The amplifier may include a transistor coupled to an output of the amplifier, and a resonator coupled between the output of the amplifier and a reference potential node, a resonant frequency of the resonator being set to be at a subharmonic of a fundamental frequency of the amplifier, and an impedance of the resonator being greater than a load impedance of the amplifier at the fundamental frequency of the amplifier.

公开(公告)号：US10381988B2

公开(公告)日：2019-08-13

申请号：US15706242

申请日：2017-09-15

Applicant: QUALCOMM Incorporated

Inventor： Yanjie Sun ,  Jing-Hwa Chen ,  Zhenying Luo ,  Yan Kit Gary Hau ,  Jisun Ryu ,  Ashwin Duggal ,  Kihun Chang ,  ZhenQi Chen ,  Xinwei Wang ,  Xiangdong Zhang

IPC: H03F3/191 ,  H03F1/52 ,  H03F1/56 ,  H03F1/02 ,  H03F3/24 ,  H03F3/195 ,  H04B1/04

Abstract: Certain aspects of the present disclosure provide methods and apparatus for operating a power amplifier. In one example, the apparatus includes a power amplifier configured to amplify an input signal having a frequency to produce a radio frequency (RF) output signal at an output and a harmonic tuning circuit coupled between a power supply and the power amplifier output, the harmonic tuning circuit configured to reduce a current or voltage provided to the power amplifier via a resonance at one or more harmonics of the frequency of the input signal.

公开(公告)号：US20180048270A1

公开(公告)日：2018-02-15

申请号：US15349225

申请日：2016-11-11

Applicant: QUALCOMM INCORPORATED

Inventor： Tianzuo Xi ,  Haichuan Kang ,  ZhenQi Chen ,  Zhenying Luo ,  Xiangdong Zhang ,  Xinwei Wang ,  Yanjie Sun ,  Yan Kit Gary Hau ,  Jing-Hwa Chen

IPC: H03F1/56 ,  H03F3/24 ,  H01L29/20 ,  H01L29/737 ,  H04B1/38 ,  H01L23/498 ,  H01L23/66 ,  H05K1/18 ,  H05K1/11 ,  G06F1/16 ,  H03F3/195 ,  H01L23/00

CPC classification number: H03F1/565 ,  G06F1/1616 ,  G06F1/1626 ,  H01L23/49827 ,  H01L23/49844 ,  H01L23/66 ,  H01L24/06 ,  H01L24/46 ,  H01L29/20 ,  H01L29/737 ,  H01L2223/6616 ,  H01L2223/6655 ,  H01L2224/04042 ,  H01L2224/16225 ,  H01L2224/4813 ,  H01L2224/4911 ,  H01L2224/73257 ,  H03F3/193 ,  H03F3/195 ,  H03F3/245 ,  H03F2200/387 ,  H04B1/38 ,  H05K1/115 ,  H05K1/18 ,  H05K2201/10015 ,  H05K2201/1003 ,  H05K2201/10166

Abstract: A circuit including a radio frequency (RF) amplifier including a transistor configured to receive an RF signal at its control terminal, a capacitor coupled to a first terminal of the transistor, an inductor coupled to a second terminal of the transistor, wherein the capacitor and inductor form a loop from the first terminal to the second terminal, wherein the loop bypasses a parasitic inductance between the second terminal and ground.