公开(公告)号：US20140073267A1

公开(公告)日：2014-03-13

申请号：US13653030

申请日：2012-10-16

Applicant: QUALCOMM INCORPORATED

Inventor： Jose Cabanillas ,  Aristotele Hadjichristos ,  Per O. Kristensen ,  Mohan V. Puntambekar

IPC: H04B1/44

CPC classification number: H03H11/344 ,  H01P1/213 ,  H03H7/465 ,  H03H11/30 ,  H03H2007/386 ,  H04B1/0458

Abstract: Techniques to implement a filter for a selected signal path by reusing a circuit component in an unselected signal path are disclosed. In an exemplary design, an apparatus includes first, second, and third circuits. The first circuit passes a first radio frequency (RF) signal to an antenna when a first signal path is selected. The second circuit passes a second RF signal to the antenna when a second signal path is selected. The third circuit is selectively coupled to the first circuit, e.g., via a switch. The first and third circuits form a filter for the second RF signal (e.g., to attenuate a harmonic of the second RF signal) when the second signal path is selected and the first signal path is unselected. The first circuit may include a series inductor, and the third circuit may include a shunt capacitor.

Abstract translation: 公开了通过重新使用未选信号路径中的电路部件来实现所选信号路径的滤波器的技术。 在示例性设计中，装置包括第一，第二和第三电路。 当选择第一信号路径时，第一电路将第一射频（RF）信号传递到天线。 当选择第二信号路径时，第二电路将第二RF信号传递到天线。 第三电路例如经由开关选择性地耦合到第一电路。 当选择第二信号路径并且未选择第一信号路径时，第一和第三电路形成用于第二RF信号的滤波器（例如，衰减第二RF信号的谐波）。 第一电路可以包括串联电感器，并且第三电路可以包括并联电容器。