公开(公告)号：BRPI0816745A2

公开(公告)日：2015-03-17

申请号：BRPI0816745

申请日：2008-09-10

Applicant: QUALCOMM INC

Inventor： CABANILLAS JOSE ,  GUDEM PRASAD S ,  KWOK SAI CHONG ,  LOVE DAVID

IPC: H04B1/52

公开(公告)号：AT497654T

公开(公告)日：2011-02-15

申请号：AT08830496

申请日：2008-09-10

Applicant: QUALCOMM INC

Inventor： CABANILLAS JOSE ,  GUDEM PRASAD ,  KWOK SAI ,  LOVE DAVID

IPC: H04B1/52

Abstract: Techniques for attenuating undesired signal components from a differential duplexer are described. The duplexer provides a differential received signal at RX+ and RX− ports. This differential received signal includes an undesired common mode signal, which may come from a transmit signal. The common mode signal is attenuated with a common mode trap in an impedance matching network coupled to the RX+ and RX− ports. The matching network includes a first passive circuit coupled between the RX+ port and a first node, a second passive circuit coupled between the RX− port and a second node, and the common mode trap coupled between the first and second nodes. In one design, the common mode trap includes a first inductor coupled between the first node and a common node, a second inductor coupled between the second node and the common node, and a capacitor coupled between the common node and circuit ground.

公开(公告)号：DE602008004843D1

公开(公告)日：2011-03-17

申请号：DE602008004843

申请日：2008-09-10

Applicant: QUALCOMM INC

Inventor： CABANILLAS JOSE ,  GUDEM PRASAD S ,  KWOK SAI CHONG ,  LOVE DAVID

IPC: H04B1/52

公开(公告)号：ES2360690T3

公开(公告)日：2011-06-08

申请号：ES08830496

申请日：2008-09-10

Applicant: QUALCOMM INC

Inventor： CABANILLAS JOSE ,  GUDEM PRASAD ,  KWOK SAI ,  LOVE DAVID

IPC: H04B1/52

Abstract: Un aparato (122) que comprende: un primer componente (424a, 624a, 724a) de circuito acoplado entre un primer nodo (A) y un nodo común (C); un segundo componente (424b, 624b, 724b) de circuito acoplado entre un segundo nodo (B) y el nodo común (C); un tercer componente (426, 626, 726) de circuito acoplado entre el nodo común (C) y un circuito de descarga a tierra, proporcionando los componentes de circuito primero, segundo y tercero un trayecto de baja impedancia a través del nodo común para una señal en modalidad común recibida en los nodos (A, B) primero y segundo desde puertos de recepción diferenciales de un duplexador (112).

公开(公告)号：CA2697906A1

公开(公告)日：2009-03-19

申请号：CA2697906

申请日：2008-09-10

Applicant: QUALCOMM INC

Inventor： CABANILLAS JOSE ,  GUDEM PRASAD S ,  KWOK SAI CHONG ,  LOVE DAVID

IPC: H04B1/52

Abstract: Techniques for attenuating undesired signal components from a differential duplexer are described. The duplexer provides a differential received signal at RX+ and RX- ports. This differential received signal includes an undesired common mode signal, which may come from a transmit signal. The common mode signal is attenuated with a common mode trap in an impedance matching network coupled to the RX+ and RX- ports. The matching network includes a first passive circuit coupled between the RX+ port and a first node, a second passive circuit coupled between the RX- port and a second node, and the common mode trap coupled between the first and second nodes. In one design, the common mode trap includes a first inductor coupled between the first node and a common node, a second inductor coupled between the second node and the common node, and a capacitor coupled between the common node and circuit ground.

公开(公告)号：CA2697906C

公开(公告)日：2014-08-19

申请号：CA2697906

申请日：2008-09-10

Applicant: QUALCOMM INC

Inventor： CABANILLAS JOSE ,  GUDEM PRASAD S ,  KWOK SAI CHONG ,  LOVE DAVID

IPC: H04B1/52

Abstract: Techniques for attenuating undesired signal components from a differential duplexer are described. The duplexer provides a differential received signal at RX+ and RX- ports. This differential received signal includes an undesired common mode signal, which may come from a transmit signal. The common mode signal is attenuated with a common mode trap in an impedance matching network coupled to the RX+ and RX- ports. The matching network includes a first passive circuit coupled between the RX+ port and a first node, a second passive circuit coupled between the RX-port and a second node, and the common mode trap coupled between the first and second nodes. In one design, the common mode trap includes a first inductor coupled between the first node and a common node, a second inductor coupled between the second node and the common node, and a capacitor coupled between the common node and circuit ground.