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    PHASE SHIFTING MIXER
    1.
    发明申请
    PHASE SHIFTING MIXER 有权
    相移机

    公开(公告)号：US20160126894A1

    公开(公告)日：2016-05-05

    申请号：US14576013

    申请日：2014-12-18

    Applicant: QUALCOMM Incorporated

    Inventor： Hasnain Mohammedi Lakdawala ,  Bin Fan ,  Ojas Mahendra Choksi

    IPC: H03D7/14 ,  H04B1/40

    CPC classification number: H03D7/1441 ,  H03D3/009 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H04B1/40 ,  H04L27/206 ,  H04L27/2089

    Abstract: Performing quadrature combining and adjusting including: a plurality of mixing circuits configured to generate a plurality of frequency converted signals; at least one mixing circuit of the plurality of mixing circuits is configured with a plurality of paths, each path representing one linearity mode; and a plurality of combining circuits configured to combine the plurality of frequency converted signals to generate a differential baseband output signal.

    Abstract translation: 执行正交组合和调整包括：多个混合电路，被配置为产生多个频率转换信号; 多个混合电路中的至少一个混频电路配置有多个路径，每个路径表示一个线性模式; 以及多个组合电路，被配置为组合多个频率转换信号以产生差分基带输出信号。

    I-Q MISMATCH CALIBRATION AND METHOD
    2.
    发明申请
    I-Q MISMATCH CALIBRATION AND METHOD 审中-公开

    公开(公告)号：US20130336143A1

    公开(公告)日：2013-12-19

    申请号：US13968763

    申请日：2013-08-16

    Applicant: Qualcomm Incorporated

    Inventor： Ojas Mahendra Choksi ,  Frederic Bossu

    IPC: H04L5/14 ,  H03M1/66

    CPC classification number: H04L5/1461 ,  H03D3/009 ,  H03M1/1019 ,  H03M1/66 ,  H04L27/0014 ,  H04L2027/0016 ,  H04L2027/0018 ,  H04L2027/0024

    Abstract: Techniques are provided for reducing mismatch between the in-phase (I) and quadrature (Q) channels of a communications transmitter or receiver. In an exemplary embodiment, separate voltages are applied to bias the gates or bulks of the transistors in a mixer of the I channel versus a mixer of the Q channel. In another exemplary embodiment, separate voltages are applied to bias the common-mode reference voltage of a transimpedance amplifier associated with each channel. Techniques are further provided for deriving bias voltages to minimize a measured residual sideband in a received or transmitted signal, or to optimize other parameters of the received or transmitted signal. Techniques for generating separate bias voltages using a bidirectional and unidirectional current digital-to-analog converter (DAC) are also disclosed.

    Quadrature combining and adjusting
    4.
    发明授权
    Quadrature combining and adjusting 有权
    正交组合和调整

    公开(公告)号：US09088471B1

    公开(公告)日：2015-07-21

    申请号：US14465442

    申请日：2014-08-21

    Applicant: QUALCOMM Incorporated

    Inventor： Hong Sun Kim ,  James Ian Jaffee ,  Paul Sheehy ,  Jeremy Darren Dunworth ,  Cheng-Han Wang ,  Prasad Srinivasa Siva Gudem ,  Ojas Mahendra Choksi ,  Jungdong Park

    IPC: H04L5/12 ,  H04L27/36 ,  H04L27/26 ,  H04L27/00

    CPC classification number: H04L27/362 ,  H04L27/206 ,  H04L27/2071 ,  H04L27/364 ,  H04L2027/0016

    Abstract: Certain aspects of the present disclosure provide methods and apparatus for performing quadrature combining and adjusting. One example circuit may include first through fourth mixing circuits. The first mixing circuit may multiply a radio frequency signal with a first local oscillating signal to generate a first frequency converted signal. The second mixing circuit may multiply a radio frequency (RF) signal with a second local oscillating signal, which may be about 90° out of phase with the first local oscillating signal, to generate a second frequency converted signal. The third and fourth mixing circuits may multiply the RF signal with the second and first signals, respectively, to generate third and fourth frequency converted signals, respectively. A first combining circuit may combine the first and third frequency converted signals, and a second combining circuit may combine the second and fourth frequency converted signals.

    Abstract translation: 本公开的某些方面提供了用于执行正交组合和调整的方法和装置。 一个示例电路可以包括第一至第四混合电路。 第一混合电路可以将射频信号与第一本地振荡信号相乘以产生第一频率转换信号。 第二混合电路可以将射频（RF）信号与第二本地振荡信号相乘，该第二本地振荡信号可以与第一本地振荡信号相差约90°，以产生第二频率转换信号。 第三和第四混频电路可以分别将RF信号与第二和第一信号相乘，以分别产生第三和第四频率转换信号。 第一组合电路可以组合第一和第三频率转换信号，并且第二组合电路可以组合第二和第四频率转换信号。

    I-Q MISMATCH CALIBRATION AND METHOD
    7.
    发明申请
    I-Q MISMATCH CALIBRATION AND METHOD 审中-公开

    公开(公告)号：US20130328707A1

    公开(公告)日：2013-12-12

    申请号：US13969231

    申请日：2013-08-16

    Applicant: Qualcomm Incorporated

    Inventor： Ojas Mahendra Choksi ,  Frederic Bossu

    IPC: H03M1/66

    CPC classification number: H04L5/1461 ,  H03D3/009 ,  H03M1/1019 ,  H03M1/66 ,  H04L27/0014 ,  H04L2027/0016 ,  H04L2027/0018 ,  H04L2027/0024

    Abstract: Techniques are provided for reducing mismatch between the in-phase (I) and quadrature (Q) channels of a communications transmitter or receiver. In an exemplary embodiment, separate voltages are applied to bias the gates or bulks of the transistors in a mixer of the I channel versus a mixer of the Q channel. In another exemplary embodiment, separate voltages are applied to bias the common-mode reference voltage of a transimpedance amplifier associated with each channel. Techniques are further provided for deriving bias voltages to minimize a measured residual sideband in a received or transmitted signal, or to optimize other parameters of the received or transmitted signal. Techniques for generating separate bias voltages using a bidirectional and unidirectional current digital-to-analog converter (DAC) are also disclosed.

    Phase shifting mixer
    10.
    发明授权
    Phase shifting mixer 有权
    相移混频器

    公开(公告)号：US09431961B2

    公开(公告)日：2016-08-30

    申请号：US14576013

    申请日：2014-12-18

    Applicant: QUALCOMM Incorporated

    Inventor： Hasnain Mohammedi Lakdawala ,  Bin Fan ,  Ojas Mahendra Choksi

    IPC: H04B1/10 ,  H03D7/14 ,  H04B1/40 ,  H03D3/00 ,  H04L27/20 ,  H04B1/26

    CPC classification number: H03D7/1441 ,  H03D3/009 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H04B1/40 ,  H04L27/206 ,  H04L27/2089

    Abstract: Performing quadrature combining and adjusting including: a plurality of mixing circuits configured to generate a plurality of frequency converted signals; at least one mixing circuit of the plurality of mixing circuits is configured with a plurality of paths, each path representing one linearity mode; and a plurality of combining circuits configured to combine the plurality of frequency converted signals to generate a differential baseband output signal.

    Abstract translation: 执行正交组合和调整包括：多个混合电路，被配置为产生多个频率转换信号; 多个混合电路中的至少一个混频电路配置有多个路径，每个路径表示一个线性模式; 以及多个组合电路，被配置为组合多个频率转换信号以产生差分基带输出信号。

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