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公开(公告)号：US20150042412A1
公开(公告)日：2015-02-12
申请号：US13961861
申请日：2013-08-07
Applicant: QUALCOMM Incorporated
Inventor： James Francis Imbornone , Yanjie Sun , Zhenying Luo , Zhenqi Chen , Calogero D. Presti , Xinwei Wang , Dong Zhang
Abstract: Techniques for efficiently integrating directional coupler circuitry with other circuit elements of an RF front end. In an aspect, one or more inductors of an RF front end filter is incorporated into a first inductor of the directional coupler, and a capacitor is further coupled in parallel with the first inductor. In another aspect, circuitry associated with matching components of the RF front end may further be incorporated into the directional coupler design. Further techniques are provided for coupling directivity tuning elements to a second inductor of the directional coupler to improve the linearity of the coupler over other tuning techniques.
Abstract translation: 用于将定向耦合器电路与RF前端的其它电路元件有效集成的技术。 一方面，RF前端滤波器的一个或多个电感器被并入定向耦合器的第一电感器中，并且电容器进一步与第一电感器并联耦合。 在另一方面，与RF前端的匹配部件相关联的电路还可以并入定向耦合器设计中。 提供了用于将方向性调谐元件耦合到定向耦合器的第二电感器的其它技术，以提高耦合器相对于其它调谐技术的线性度。
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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
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.
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3.发明授权公开(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
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.
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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.
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