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：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：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.

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：BRPI0514232A

公开(公告)日：2008-06-03

申请号：BRPI0514232

申请日：2005-08-10

Applicant: QUALCOMM INC

Inventor： CABANILLAS JOSE

IPC: H03B5/12

Abstract: A multi-band VCO employs a coupled-inductor based resonator having N>=2 ports. Each port has an inductor and at least one capacitor. The N inductors for the N ports are magnetically coupled. The inductors/ports may be selectively enabled and disabled to allow the VCO to operate at different frequency bands. The capacitor(s) for each port may include one or more fixed capacitors, one or more variable capacitors (varactors), one or more switchable capacitors, or any combination of fixed, variable, and switchable capacitors. The switchable capacitors (if any) in the enabled ports may be selectively enabled and disabled to vary the VCO oscillation frequency. The varactors (if any) in the enabled ports can vary the oscillation frequency to lock the VCO to a desired frequency. The multi-band VCO may be implemented with various oscillator topologies and can replace multiple single-band VCOs.

公开(公告)号：WO2008112800A2

公开(公告)日：2008-09-18

申请号：PCT/US2008056711

申请日：2008-03-12

Applicant: QUALCOMM INC ,  CHANG LI-CHUNG ,  GUDEM PRASAD S ,  CABANILLAS JOSE

Inventor： CHANG LI-CHUNG ,  GUDEM PRASAD S ,  CABANILLAS JOSE

IPC: H04B1/52 ,  H04B1/10

CPC classification number: H04B1/525 ,  H04B1/1036

Abstract: This disclosure describes techniques for reducing adverse effects of TX signal leakage in a full-duplex, wireless communication device. The techniques make use of a notch filter to reject TX signal leakage in a signal processed in the RX path of the wireless communication device. The notch filter may be constructed as a complex notch filter using passive resistor and capacitor components to produce a notch frequency that attenuates TX signal leakage components in a desired signal. The notch filter may be applied to a down-converted, baseband signal produced by a passive mixer.

Abstract translation: 本公开描述了用于减少全双工无线通信设备中的TX信号泄漏的不利影响的技术。 这些技术利用陷波滤波器来抑制在无线通信设备的RX路径中处理的信号中的TX信号泄漏。 陷波滤波器可以被构造为使用无源电阻器和电容器部件的复陷波滤波器，以产生在所需信号中衰减TX信号泄漏分量的陷波频率。 陷波滤波器可以应用于由无源混频器产生的下变频的基带信号。