公开(公告)号：US20190020317A1

公开(公告)日：2019-01-17

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 ,  H03F3/21 ,  H03F1/02

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：US20240039480A1

公开(公告)日：2024-02-01

申请号：US18483877

申请日：2023-10-10

Applicant: QUALCOMM Incorporated

Inventor： Xiangdong ZHANG ,  Ryan Scott Castro SPRING ,  Marco CASSIA ,  Yan Kit Gary HAU ,  Kanan GANDHI ,  Robert WILSON

IPC: H03F1/02 ,  H03F3/195

CPC classification number: H03F1/0227 ,  H03F3/195 ,  H03F2200/451

Abstract: An apparatus is disclosed for waveform-tailored average power tracking. In an example aspect, the apparatus includes an amplifier, a power converter, and an average power tracking module. The amplifier is configured to amplify radio-frequency signals using a supply voltage. The radio-frequency signals have different waveforms. The power converter is coupled to the amplifier and configured to provide the supply voltage. The average power tracking module is coupled to the power converter and configured to adjust the supply voltage according to the different waveforms to cause the supply voltage to vary across at least two waveforms of the different waveforms for related average output powers.

公开(公告)号：US20210273615A1

公开(公告)日：2021-09-02

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

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：US20200099342A1

公开(公告)日：2020-03-26

申请号：US16137082

申请日：2018-09-20

Applicant: QUALCOMM INCORPORATED

Inventor： Yan Kit Gary HAU ,  Jisun RYU ,  Zhenying LUO ,  Xinwei WANG ,  Xiangdong ZHANG

IPC: H03F1/02 ,  H03F3/72 ,  H03F3/21 ,  H03F3/24 ,  H01L27/12

Abstract: An amplifier circuit includes a driver amplifier implemented on a silicon-on-insulator (SOI) substrate and configured to amplify a radio frequency (RF) signal, a bypass circuit implemented on the SOI substrate and configured to selectively bypass the driver amplifier, an output coupled to the driver amplifier and the bypass circuit, an interconnect configured to couple the output to a gallium arsenide (GaAs) substrate, and a power amplifier implemented on the GaAs substrate and configured to amplify a signal received over the interconnect from the output.

公开(公告)号：US20190089314A1

公开(公告)日：2019-03-21

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: H03F1/52 ,  H03F1/56 ,  H03F1/02 ,  H03F3/24 ,  H03F3/195

CPC classification number: H03F1/52 ,  H03F1/0205 ,  H03F1/565 ,  H03F3/195 ,  H03F3/245 ,  H03F2200/171 ,  H03F2200/225 ,  H03F2200/318 ,  H03F2200/387 ,  H03F2200/391 ,  H03F2200/411 ,  H03F2200/426 ,  H03F2200/451 ,  H04B1/04 ,  H04B1/48 ,  H04B1/52 ,  H04B2001/0408

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.