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    IMPEDANCE MATCHING CIRCUITS WITH MULTIPLE CONFIGURATIONS
    2.
    发明公开
    IMPEDANCE MATCHING CIRCUITS WITH MULTIPLE CONFIGURATIONS 有权
    IMPEDANZANPASSUNGSSCHALTUNGEN MIT MEHREREN KONFIGURATIONEN

    公开(公告)号：EP2756597A2

    公开(公告)日：2014-07-23

    申请号：EP12784770.5

    申请日：2012-09-13

    申请人： Qualcomm Incorporated

    发明人： SEE, Puay Hoe ,  ZHANG, Xiangdong

    IPC分类号： H03F1/56

    CPC分类号： H03F1/56 ,  H03H7/38

    摘要： Reconfigurable impedance matching circuits with multiple configurations are disclosed. A reconfigurable impedance matching circuit may be implemented with a set of reactive elements (e.g., inductors and/or capacitors) and a set of switches. Different configurations may be obtained with different settings of the switches and may be associated with different impedance tuning curves. This may enable the reconfigurable impedance matching circuit to provide better impedance matching for a load circuit (e.g., an antenna). In an exemplary design, the reconfigurable impedance matching circuit includes at least one variable reactive element configured to tune the impedance of the reconfigurable impedance matching circuit in order to provide better impedance matching. In an exemplary design, the reconfigurable impedance matching circuit may include at least one reconfigurable reactive element, each of which can be connected as a series element or a shunt element.

    摘要翻译： 公开了具有多种配置的可重构阻抗匹配电路。 可重构阻抗匹配电路可以用一组无功元件（例如，电感器和/或电容器）和一组开关来实现。 可以通过开关的不同设置获得不同的配置，并且可以与不同的阻抗调谐曲线相关联。 这可以使可重构阻抗匹配电路为负载电路（例如，天线）提供更好的阻抗匹配。 在示例性设计中，可重构阻抗匹配电路包括至少一个可变无功元件，其被配置为调整可重构阻抗匹配电路的阻抗，以便提供更好的阻抗匹配。 在示例性设计中，可重新配置的阻抗匹配电路可以包括至少一个可重新配置的反应元件，每个元件可以串联元件或分流元件连接。

    POWER AND IMPEDANCE MEASUREMENT CIRCUITS FOR A WIRELESS COMMUNICATION DEVICE
    3.
    发明授权
    POWER AND IMPEDANCE MEASUREMENT CIRCUITS FOR A WIRELESS COMMUNICATION DEVICE 有权
    无线通信设备的功率和阻抗测量电路

    公开(公告)号：EP2443752B1

    公开(公告)日：2018-03-14

    申请号：EP10740439.4

    申请日：2010-06-21

    申请人： QUALCOMM Incorporated

    发明人： SEE, Puay Hoe ,  BALLANTYNE, Gary John ,  SAHOTA, Gurkanwal Singh ,  HADJICHRISTOS, Aristotele ,  CICALINI, Alberto

    IPC分类号： H03H7/40 ,  H04B1/04

    CPC分类号： H04B1/0458 ,  H03H7/40

    摘要： Exemplary embodiments disclosed are directed to power and impedance measurement circuits that may be used to measure power and/or impedance are described. A measurement circuit may include a sensor and a computation unit. The sensor may sense (i) a first voltage signal across a series circuit coupled to a load to obtain a first sensed signal and (ii) a second voltage signal at a designated end of the series circuit to obtain a second sensed signal. The sensor may mix (i) a first version of the first sensed signal with a first version of the second sensed signal to obtain a first sensor output and (ii) a second version of the first sensed signal with a second version of the second sensed signal to obtain a second sensor output. The computation unit may determine the impedance and/or delivered power at the designated end of the series circuit based on the sensor outputs.

    AMPLIFIER PREDISTORTION AND AUTOCALIBRATION METHOD AND APPARATUS
    4.
    发明公开
    AMPLIFIER PREDISTORTION AND AUTOCALIBRATION METHOD AND APPARATUS 审中-公开
    VERSTÄRKERVORVERZERRUNGS-和设备以及自动校准

    公开(公告)号：EP1704640A1

    公开(公告)日：2006-09-27

    申请号：EP05711536.2

    申请日：2005-01-14

    申请人： Qualcomm, Incorporated

    发明人： RAGHUPATHY, Arun ,  SEE, Puay Hoe ,  SAHOTA, Gurkanwal Kamal ,  REEVES, Robert ,  PETERZELL, Paul, E.

    IPC分类号： H03F1/32 ,  H03G3/30

    CPC分类号： H03F1/3247 ,  H03F1/0222 ,  H03F1/3282 ,  H03F2201/3233 ,  H03G3/3047

    摘要： Methods and apparatus for amplifier AM and PM predistortion and autocalibration. AM and PM amplifier distortion can be corrected using predistortion. The AM and PM distortion characteristics of the amplifier are determined using an autocalibration technique. The amplifier characteristics can be stored in distinct look up tables (526, 712). Alternatively, the inverse of the amplifier characteristics can be stored in distinct look up tables. Signals that are to be amplified are characterized in polar format having a phase component with a normalized magnitude and a magnitude component. The phase component can be predistorted by applying the inverse of the PM distortion characteristics to the signal. Similarly, the magnitude component can be predistorted by applying the inverse of the AM distortion characteristics to the signal. The predistorted phase component can be amplified using the previously characterized amplifier. The predistorted magnitude component can be used to set the gain of the previously characterized amplifier.

    POWER AND IMPEDANCE MEASUREMENT CIRCUITS FOR A WIRELESS COMMUNICATION DEVICE
    5.
    发明公开
    POWER AND IMPEDANCE MEASUREMENT CIRCUITS FOR A WIRELESS COMMUNICATION DEVICE 有权
    电力及阻抗测量电路用于无线通信设备

    公开(公告)号：EP2443752A2

    公开(公告)日：2012-04-25

    申请号：EP10740439.4

    申请日：2010-06-21

    申请人： QUALCOMM Incorporated

    发明人： SEE, Puay Hoe ,  BALLANTYNE, Gary John ,  SAHOTA, Gurkanwal Singh ,  HADJICHRISTOS, Aristotele ,  CICALINI, Alberto

    IPC分类号： H04B1/04

    CPC分类号： H04B1/0458 ,  H03H7/40

    摘要： Exemplary embodiments disclosed are directed to power and impedance measurement circuits that may be used to measure power and/or impedance are described. A measurement circuit may include a sensor and a computation unit. The sensor may sense (i) a first voltage signal across a series circuit coupled to a load to obtain a first sensed signal and (ii) a second voltage signal at a designated end of the series circuit to obtain a second sensed signal. The sensor may mix (i) a first version of the first sensed signal with a first version of the second sensed signal to obtain a first sensor output and (ii) a second version of the first sensed signal with a second version of the second sensed signal to obtain a second sensor output. The computation unit may determine the impedance and/or delivered power at the designated end of the series circuit based on the sensor outputs.

    MULTI-STAGE IMPEDANCE MATCHING
    8.
    发明公开
    MULTI-STAGE IMPEDANCE MATCHING 审中-公开
    多级阻抗匹配

    公开(公告)号：EP2462693A1

    公开(公告)日：2012-06-13

    申请号：EP10743295.7

    申请日：2010-08-03

    申请人： Qualcomm Incorporated

    发明人： NEJATI, Babak ,  ZHAO, Yu ,  PLETCHER, Nathan M. ,  HADJICHRISTOS, Aristotele ,  SEE, Puay Hoe

    IPC分类号： H03F1/56 ,  H03F3/72

    CPC分类号： H03F1/565 ,  H03F3/211 ,  H03F3/72

    摘要： Exemplary techniques for performing impedance matching are described. In an exemplary embodiment, the apparatus may include an amplifier (e.g., a power amplifier) coupled to first and second matching circuits. The first matching circuit may include multiple stages coupled to a first node and may provide input impedance matching for the amplifier. The second matching circuit may include multiple stages coupled to a second node and may provide output impedance matching for the amplifier. At least one switch may be coupled between the first and second nodes and may bypass or select the amplifier. The first and second nodes may have a common impedance. The apparatus may further include a second amplifier coupled in parallel with the amplifier and further to the matching circuits. The second matching circuit may include a first input stage coupled to the amplifier, a second input stage coupled to the second amplifier, and a second stage coupled to the two input stages via switches.

    ADAPTIVE TUNING OF AN IMPEDANCE MATCHING CIRCUIT IN A WIRELESS DEVICE
    10.
    发明公开
    ADAPTIVE TUNING OF AN IMPEDANCE MATCHING CIRCUIT IN A WIRELESS DEVICE 审中-公开
    自适应VOTING阻抗匹配电路在无线设备处

    公开(公告)号：EP2759064A2

    公开(公告)日：2014-07-30

    申请号：EP12775085.9

    申请日：2012-09-19

    申请人： Qualcomm Incorporated

    发明人： SEE, Puay Hoe ,  ZHANG, Xiangdong

    IPC分类号： H04B1/04 ,  H04B1/18

    CPC分类号： H04B1/0458 ,  H03H7/40 ,  H04B1/18

    摘要： Techniques for adaptively tuning an impedance matching circuit are disclosed. In an aspect, the impedance matching circuit is pre-characterized. The performance of the impedance matching circuit is determined for multiple settings of the impedance matching circuit, stored in memory, and used to tune the impedance matching circuit. In another aspect, the impedance matching circuit is tuned based on measurements for one or more parameters such as delivered power, return loss, power amplifier current, antenna/load impedance, etc. In an exemplary design, an apparatus includes a memory and a control unit. The memory stores information for multiple settings of an impedance matching circuit. The control unit selects one of the multiple settings of the impedance matching circuit based on the information for the multiple settings and measurements for the impedance matching circuit. The impedance matching circuit performs impedance matching for a load circuit (e.g., an antenna) based on the selected setting.