公开(公告)号：IN4778CHN2014A

公开(公告)日：2015-09-18

申请号：IN4778CHN2014

申请日：2014-06-24

Applicant: QUALCOMM INC

Inventor： PRESTI CALOGERO D

IPC: H04B1/04

Abstract: An output circuit with an integrated directional coupler and impedance matching circuit is disclosed. In an exemplary design an apparatus includes a switchplexer and an output circuit. The switchplexer is coupled to at least one power amplifier. The output circuit is coupled to the switchplexer and a load (e.g. an antenna) and includes a directional coupler and an impedance matching circuit sharing at least one inductor. The output circuit performs impedance matching for the load. The output circuit also acts as a directional coupler and provides an input radio frequency (RF) signal as an output RF signal and further couples a portion of the input RF signal as a coupled RF signal. Reusing the at least one inductor for both the directional coupler and the impedance matching circuit may reduce circuitry size and cost of the wireless device and may also improve performance.

公开(公告)号：IN4414CHN2014A

公开(公告)日：2015-09-04

申请号：IN4414CHN2014

申请日：2014-06-13

Applicant: QUALCOMM INC

Inventor： CABANILLAS JOSE ,  PRESTI CALOGERO D ,  NEJATI BABAK ,  KLEMENS GUY

IPC: H03H7/40

Abstract: An impedance matching circuit with at least one tunable notch filter for a power amplifier is disclosed. The power amplifier amplifies an input radio frequency (RF) signal and provides an amplified RF signal. The impedance matching circuit performs output impedance matching for the power amplifier and includes at least one tunable notch filter. Each tunable notch filter has a notch that can be varied in frequency to provide better attenuation of an undesired signal. The at least one tunable notch filter attenuates at least one undesired signal in the amplified RF signal. The at least one tunable notch filter may include (i) a first tunable notch filter to attenuate a first undesired signal at a second harmonic of the amplified RF signal and/or (ii) a second tunable notch filter to attenuate a second undesired signal at a third harmonic of the amplified RF signal.

公开(公告)号：WO2015020927A2

公开(公告)日：2015-02-12

申请号：PCT/US2014049531

申请日：2014-08-04

Applicant: QUALCOMM INC

Inventor： IMBORNONE JAMES FRANCIS ,  SUN YANJIE ,  LUO ZHENYING ,  CHEN ZHENQI ,  PRESTI CALOGERO D ,  WANG XINWEI ,  ZHANG XIANGDONG

IPC: H03H7/48

CPC classification number: H03H7/463 ,  H01P5/18 ,  H03H7/48

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。 在一个方面，RF前端滤波器的一个或多个电感器被并入到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。