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    Cancellation of RF Second-Order Intermodulation Distortion
    3.
    发明申请
    Cancellation of RF Second-Order Intermodulation Distortion 有权

    公开(公告)号：US20130210375A1

    公开(公告)日：2013-08-15

    申请号：US13372913

    申请日：2012-02-14

    申请人： Krzysztof Dufrene

    发明人： Krzysztof Dufrene

    IPC分类号： H04B15/00 ,  H04B1/44

    CPC分类号： H04B1/525

    摘要： The disclosed invention relates to a transceiver system configured to cancel RF second-order intermodulation distortion (IMD2) within a differential reception path. In some embodiments, the transceiver system has one or more common-mode attenuation elements that attenuate common-mode interferer signals within the differential reception path. The common-mode attenuation elements detect a common-mode interferer from one or more nodes within a transceiver system front-end. One or more properties of the detected common-mode interferer are adjusted and then fed into the differential reception path, where the adjusted common-mode signal attenuates the common-mode interferers. In other embodiments, the differential reception path has a tunable amplifying stage. The tunable amplifying stage has first and second amplifier elements that are independently operated to intentionally introduce an operating parameter mismatch between the elements. The intentional mismatch may be tuned to account for different nonlinear responses of the amplifier elements to mitigate IMD2 within the differential reception path.

    MULTIPLE MODULATED SPUR CANCELLATION APPARATUS
    4.
    发明申请
    MULTIPLE MODULATED SPUR CANCELLATION APPARATUS 审中-公开

    公开(公告)号：US20170359136A1

    公开(公告)日：2017-12-14

    申请号：US15179211

    申请日：2016-06-10

    申请人： Krzysztof Dufrene ,  Ram S. Kanumalli ,  Silvester Sadjina ,  Andreas Gebhard

    发明人： Krzysztof Dufrene ,  Ram S. Kanumalli ,  Silvester Sadjina ,  Andreas Gebhard

    IPC分类号： H04J1/12 ,  H04L5/00

    摘要： An apparatus of a wireless device can include baseband processing circuitry configured to generate a digitized downconverted signal based on a received radio frequency (RF) signal. The apparatus can also include estimation circuitry configured to detect a blocker signal in the downconverted signal, the blocker signal having power that exceeds a pre-determined threshold, and map the detected blocker signal to a plurality of harmonic frequencies associated with two or more carrier frequencies. The apparatus can include reference signal generation circuitry configured to generate a reference signal based on the plurality of harmonic frequencies and the received RF signal. The apparatus can include cancellation circuitry configured to apply a pre-processed reference signal (based on the reference signal) to the digitized downconverted signal to remove distortion associated with the detected blocker signal. The digitized downconverted signal is a baseband signal or an intermediate frequency (IF) signal.

    Cancellation of RF second-order intermodulation distortion
    5.
    发明授权
    Cancellation of RF second-order intermodulation distortion 有权
    RF二阶互调失真的消除

    公开(公告)号：US08843082B2

    公开(公告)日：2014-09-23

    申请号：US13372913

    申请日：2012-02-14

    申请人： Krzysztof Dufrene

    发明人： Krzysztof Dufrene

    IPC分类号： H04B1/40

    CPC分类号： H04B1/525

    摘要： The disclosed invention relates to a transceiver system configured to cancel RF second-order intermodulation distortion (IMD2) within a differential reception path. In some embodiments, the transceiver system has one or more common-mode attenuation elements that attenuate common-mode interferer signals within the differential reception path. The common-mode attenuation elements detect a common-mode interferer from one or more nodes within a transceiver system front-end. One or more properties of the detected common-mode interferer are adjusted and then fed into the differential reception path, where the adjusted common-mode signal attenuates the common-mode interferers. In other embodiments, the differential reception path has a tunable amplifying stage. The tunable amplifying stage has first and second amplifier elements that are independently operated to intentionally introduce an operating parameter mismatch between the elements. The intentional mismatch may be tuned to account for different nonlinear responses of the amplifier elements to mitigate IMD2 within the differential reception path.

    摘要翻译： 所公开的本发明涉及一种被配置为消除差分接收路径内的RF二阶互调失真（IMD2）的收发器系统。 在一些实施例中，收发器系统具有衰减差分接收路径内的共模干扰信号的一个或多个共模衰减元件。 共模衰减元件从收发器系统前端中的一个或多个节点检测共模干扰源。 检测到的共模干扰源的一个或多个属性被调整，然后被馈送到差分接收路径，其中调整的共模信号衰减共模干扰源。 在其他实施例中，差分接收路径具有可调放大级。 可调放大级具有第一和第二放大器元件，其独立地操作以有意地引入元件之间的操作参数失配。 可以调整故意失配以考虑放大器元件的不同非线性响应以减轻差分接收路径内的IMD2。

    RF-DAC CELL AND METHOD FOR PROVIDING AN RF OUTPUT SIGNAL
    6.
    发明申请
    RF-DAC CELL AND METHOD FOR PROVIDING AN RF OUTPUT SIGNAL 有权
    RF-DAC单元和提供RF输出信号的方法

    公开(公告)号：US20140159933A1

    公开(公告)日：2014-06-12

    申请号：US13711958

    申请日：2012-12-12

    申请人： Krzysztof Dufrene ,  Harald Pretl ,  Patrick Ossmann

    发明人： Krzysztof Dufrene ,  Harald Pretl ,  Patrick Ossmann

    IPC分类号： H03M1/66

    CPC分类号： H03M1/66 ,  H03M1/0612

    摘要： An RF-DAC cell is configured to generate an RF output signal based on a baseband signal, a first signal and a second signal. The first signal has a first duty cycle and toggles between first predefined amplitude values, and the second signal has a second duty cycle smaller than the first duty cycle and toggles between second predefined amplitude values.

    摘要翻译： RF-DAC单元被配置为基于基带信号，第一信号和第二信号产生RF输出信号。 第一信号具有第一占空比并且在第一预定幅度值之间切换，并且第二信号具有小于第一占空比的第二占空比，并且在第二预定幅度值之间切换。

    Cancellation of RF second-order intermodulation distortion
    8.
    发明授权
    Cancellation of RF second-order intermodulation distortion 失效

    公开(公告)号：US08744363B2

    公开(公告)日：2014-06-03

    申请号：US13396012

    申请日：2012-02-14

    申请人： Krzysztof Dufrene

    发明人： Krzysztof Dufrene

    IPC分类号： H04B1/00 ,  H04B1/16

    CPC分类号： H04B1/1036

    摘要： The disclosed invention relates to a transceiver system configured to cancel RF second-order intermodulation distortion (IMD2) within a differential reception path. In some embodiments, the transceiver system has one or more common-mode attenuation elements that attenuate common-mode interferer signals within the differential reception path. The common-mode attenuation elements detect a common-mode interferer from one or more nodes within a transceiver system front-end. One or more properties of the detected common-mode interferer are adjusted and then fed into the differential reception path, where the adjusted common-mode signal attenuates the common-mode interferers. In other embodiments, the differential reception path has a tunable amplifying stage. The tunable amplifying stage has first and second amplifier elements that are independently operated to intentionally introduce an operating parameter mismatch between the elements. The intentional mismatch may be tuned to account for different nonlinear responses of the amplifier elements to mitigate IMD2 within the differential reception path.

    Filtering using impedance translator
    9.
    发明授权
    Filtering using impedance translator 有权
    使用阻抗转换器进行滤波

    公开(公告)号：US08644785B2

    公开(公告)日：2014-02-04

    申请号：US13451399

    申请日：2012-04-19

    申请人： Rastislav Vazny ,  Krzysztof Dufrene ,  Hans Pletzer ,  Werner Schelmbauer ,  Harald Pretl

    发明人： Rastislav Vazny ,  Krzysztof Dufrene ,  Hans Pletzer ,  Werner Schelmbauer ,  Harald Pretl

    IPC分类号： H04B1/10

    CPC分类号： H04B1/18

    摘要： This disclosure relates to low noise amplifiers (LNAs) and more particularly to LNAs integrated on integrated circuit (IC) chips along with radio frequency (RF) amplifiers. In one implementation, an impedance translator is coupled to an amplifier, the impedance translator to cause the amplifier to selectively amplify the one or more components of a received signal.

    摘要翻译： 本公开涉及低噪声放大器（LNA），更具体地涉及集成在集成电路（IC）芯片上的射频（RF）放大器的LNA。 在一个实现中，阻抗转换器耦合到放大器，阻抗转换器使得放大器选择性地放大接收信号的一个或多个分量。