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    Low-power wireless diversity receiver with multiple receive paths
    2.
    发明授权
    Low-power wireless diversity receiver with multiple receive paths 有权
    具有多个接收路径的低功率无线分集接收机

    公开(公告)号：US09026070B2

    公开(公告)日：2015-05-05

    申请号：US10993011

    申请日：2004-11-18

    申请人： Charles J. Persico ,  Kevin Gard ,  Gurkanwal Kamal Sahota ,  Shinichi Miyazaki ,  Steven C. Ciccarelli

    发明人： Charles J. Persico ,  Kevin Gard ,  Gurkanwal Kamal Sahota ,  Shinichi Miyazaki ,  Steven C. Ciccarelli

    IPC分类号： H04B17/02 ,  H04K3/00 ,  H04B1/10 ,  H04B7/08 ,  H04B1/16

    CPC分类号： H04K3/224 ,  H04B1/109 ,  H04B7/082

    摘要： A low-power diversity receiver includes at least two receive paths, each of which is designated as a primary or secondary receive path. A primary receive path is compliant with system requirements (e.g., IS-98D requirements). A secondary receive path is not fully compliant with the system requirements and is designed for lower power, less area, and lower cost than the primary receive path. For a multi-antenna receiver, the two receive paths may be used to simultaneously process two received signals from two antennas. For a single-antenna receiver, either the primary or secondary receive path is selected, e.g., depending on whether or not large amplitude “jammers” are detected, to process a single input signal from one antenna. The receiver may include additional receive paths for additional frequency bands and/or GPS.

    摘要翻译： 低功率分集接收器包括至少两个接收路径，每个接收路径被指定为主要或次要接收路径。 主要接收路径符合系统要求（例如，IS-98D要求）。 次要接收路径不完全符合系统要求，并且设计为比主接收路径更低的功率，更少的面积和更低的成本。 对于多天线接收机，两个接收路径可以用于同时处理来自两个天线的两个接收信号。 对于单天线接收机，例如，取决于是否检测到大的振幅“干扰”，选择主要或次要接收路径来处理来自一个天线的单个输入信号。 接收机可以包括用于附加频带和/或GPS的附加接收路径。

    Tunable multi-band receiver
    3.
    发明授权
    Tunable multi-band receiver 有权
    可调谐多频段接收机

    公开(公告)号：US09002309B2

    公开(公告)日：2015-04-07

    申请号：US13118283

    申请日：2011-05-27

    申请人： Gurkanwal Singh Sahota ,  Steven C. Ciccarelli ,  Sang-June Park ,  Charles J. Persico

    发明人： Gurkanwal Singh Sahota ,  Steven C. Ciccarelli ,  Sang-June Park ,  Charles J. Persico

    IPC分类号： H04B1/18 ,  H04B1/00 ,  H04B1/10 ,  H03H7/01

    CPC分类号： H04B1/525 ,  H03H2007/013 ,  H04B1/006 ,  H04B1/1036

    摘要： A tunable multi-band receiver supporting operation on a plurality of frequency bands is disclosed. In an exemplary design, the tunable multi-band receiver includes an antenna tuning network, a tunable notch filter, and at least one low noise amplifier (LNA). The antenna tuning network tunes an antenna (e.g., a diversity antenna) to a receive band in a plurality of receive bands. The tunable notch filter is tunable to a transmit band in a plurality of transmit bands and attenuates signal components in the transmit band. One LNA among the at least one LNA amplifies an output signal from the tunable notch filter. The tunable multi-band receiver may further include one or more additional tunable notch filters to further attenuate the signal components in the transmit band.

    摘要翻译： 公开了一种在多个频带上支持操作的可调谐多频带接收机。 在示例性设计中，可调谐多频带接收机包括天线调谐网络，可调谐陷波滤波器和至少一个低噪声放大器（LNA）。 天线调谐网络将天线（例如，分集天线）调谐到多个接收频带中的接收频带。 可调陷波滤波器可调谐到多个发射频带中的发射频带，并衰减发射频带中的信号分量。 至少一个LNA中的一个LNA放大来自可调陷波滤波器的输出信号。 可调谐多频带接收机还可以包括一个或多个附加可调陷波滤波器，以进一步衰减发射频带中的信号分量。

    TUNABLE MULTI-BAND RECEIVER
    4.
    发明申请
    TUNABLE MULTI-BAND RECEIVER 有权
    TUNABLE多带接收器

    公开(公告)号：US20120302188A1

    公开(公告)日：2012-11-29

    申请号：US13118283

    申请日：2011-05-27

    申请人： Gurkanwal Singh Sahota ,  Steven C. Ciccarelli ,  Sang-June Park ,  Charles J. Persico

    发明人： Gurkanwal Singh Sahota ,  Steven C. Ciccarelli ,  Sang-June Park ,  Charles J. Persico

    IPC分类号： H04B1/18

    CPC分类号： H04B1/525 ,  H03H2007/013 ,  H04B1/006 ,  H04B1/1036

    摘要： A tunable multi-band receiver supporting operation on a plurality of frequency bands is disclosed. In an exemplary design, the tunable multi-band receiver includes an antenna tuning network, a tunable notch filter, and at least one low noise amplifier (LNA). The antenna tuning network tunes an antenna (e.g., a diversity antenna) to a receive band in a plurality of receive bands. The tunable notch filter is tunable to a transmit band in a plurality of transmit bands and attenuates signal components in the transmit band. One LNA among the at least one LNA amplifies an output signal from the tunable notch filter. The tunable multi-band receiver may further include one or more additional tunable notch filters to further attenuate the signal components in the transmit band.

    摘要翻译： 公开了一种在多个频带上支持操作的可调谐多频带接收机。 在示例性设计中，可调谐多频带接收机包括天线调谐网络，可调谐陷波滤波器和至少一个低噪声放大器（LNA）。 天线调谐网络将天线（例如，分集天线）调谐到多个接收频带中的接收频带。 可调陷波滤波器可调谐到多个发射频带中的发射频带，并衰减发射频带中的信号分量。 至少一个LNA中的一个LNA放大来自可调陷波滤波器的输出信号。 可调谐多频带接收机还可以包括一个或多个附加可调陷波滤波器，以进一步衰减发射频带中的信号分量。

    Dynamic reference frequency for fractional-N Phase-Locked Loop
    5.
    发明授权
    Dynamic reference frequency for fractional-N Phase-Locked Loop 有权
    分数N锁相环的动态参考频率

    公开(公告)号：US09287886B2

    公开(公告)日：2016-03-15

    申请号：US12366441

    申请日：2009-02-05

    申请人： Steven C. Ciccarelli ,  Frederic Bossu ,  Vladimir Aparin ,  Kevin H. Wang

    发明人： Steven C. Ciccarelli ,  Frederic Bossu ,  Vladimir Aparin ,  Kevin H. Wang

    IPC分类号： H04B1/40 ,  H03L7/197

    CPC分类号： H03L7/1974

    摘要： Within a receiver, the frequency of a comparison reference clock signal supplied to a fractional-N Phase-Locked Loop (PLL) is dynamically changed such that undesirable reciprocal mixing of reference spurs with known jammers (for example, transmit leakage) is minimized. As the transmit channel changes within a band, and as the transmit leakage frequency changes, a circuit changes the frequency of the comparison reference clock signal such that reference spurs generated by the PLL are moved in frequency so that they do not reciprocally mix with transmitter leakage in undesirable ways. In a second aspect, the PLL is operable either as an integer-N PLL or a fractional-N PLL. In low total receive power situations, the PLL operates as an integer-N PLL to reduce receiver susceptibility to fractional-N spurs. In a third aspect, jammer detect information is used to determine the comparison reference clock signal frequency.

    摘要翻译： 在接收机内，提供给分数N锁相环（PLL）的比较参考时钟信号的频率被动态地改变，使得具有已知干扰的参考杂波（例如，传输泄漏）的不期望的相互混合被最小化。 当发射信道在频带内变化时，并且随着发射泄漏频率的变化，电路改变比较参考时钟信号的频率，使得PLL产生的参考杂波频率移动，使得它们不与发射机泄漏相互混合 以不良的方式。 在第二方面，PLL可以作为整数N个PLL或分数N PLL来操作。 在低总接收功率情况下，PLL作为整数N PLL进行操作，以减少接收机对分数N个杂散的敏感性。 在第三方面，使用干扰检测信息来确定比较参考时钟信号频率。

    Techniques for controlling operation of control loops in a receiver
    7.
    发明授权
    Techniques for controlling operation of control loops in a receiver 有权
    控制接收机控制回路运行的技术

    公开(公告)号：US08781426B2

    公开(公告)日：2014-07-15

    申请号：US11560802

    申请日：2006-11-16

    申请人： Steven C. Ciccarelli ,  Brian Banister ,  Brian George ,  Soon-Seng Lau ,  Prasad Gudem ,  Arun Raghupathy

    发明人： Steven C. Ciccarelli ,  Brian Banister ,  Brian George ,  Soon-Seng Lau ,  Prasad Gudem ,  Arun Raghupathy

    IPC分类号： H04B1/06

    CPC分类号： H04B1/109

    摘要： Techniques for controlling operation of control loops in a receiver are described. The operation of at least one control loop is modified in conjunction with a change in operating state, which may correspond to a change in linearity state, gain state, operating frequency, antenna configuration, etc. A change in linearity state may occur when jammers are detected and may cause bias current of analog circuit blocks to be adjusted. The at least one control loop to be modified may include a DC loop, an AGC loop, etc. The operation of a control loop may be modified by disabling the control loop or changing its time constant prior to changing operating state, waiting a predetermined amount of time to allow the receiver to settle, and enabling the control loop or restoring its time constant after waiting the predetermined amount of time.

    摘要翻译： 描述了用于控制接收机中的控制环路的操作的技术。 结合操作状态的改变来修改至少一个控制回路的操作，其可以对应于线性状态，增益状态，操作频率，天线配置等的改变。线性状态的变化可能发生在干扰器 并且可能导致模拟电路块的偏置电流被调整。 要修改的至少一个控制环路可以包括DC环路，AGC环路等。可以通过在改变操作状态之前禁用控制环路或改变其时间常数来修改控制环路的操作，等待预定量 的时间以允许接收机安定，并且在等待预定时间量之后启用控制环路或恢复其时间常数。

    Dynamic LNA switch points based on channel conditions
    8.
    发明授权
    Dynamic LNA switch points based on channel conditions 有权
    基于通道条件的动态LNA切换点

    公开(公告)号：US08521198B2

    公开(公告)日：2013-08-27

    申请号：US11560790

    申请日：2006-11-16

    申请人： Steven C. Ciccarelli ,  Brian George ,  Soon-Seng Lau

    发明人： Steven C. Ciccarelli ,  Brian George ,  Soon-Seng Lau

    IPC分类号： H04B15/00

    CPC分类号： H04B1/109 ,  H03F3/72 ,  H03F2200/294 ,  H03F2203/7231 ,  H04K3/224 ,  H04W52/0238 ,  Y02D70/1222 ,  Y02D70/40

    摘要： Techniques for operating a receiver to linearity performance and higher receive signal to noise ratio are described. The receiver includes one or more circuit blocks, e.g., a low noise amplifier (LNA), having discrete gain states. The gain states are selected based on switch points, with each switch point indicating a specific received signal level at which to switch from one gain state to another gain state. The switch points may be dynamically selected based on channel conditions, which may be characterized by the presence or absence or strength or frequency of jammers. A first set of switch points may be selected when jammers are detected, and a second set of switch points may be selected when jammers are not detected. The gain states are selected in accordance with the set of switch points selected for use.

    摘要翻译： 描述了用于操作接收机以获得线性性能和较高接收信噪比的技术。 接收机包括具有离散增益状态的一个或多个电路块，例如低噪声放大器（LNA）。 根据切换点选择增益状态，每个开关点指示从一个增益状态切换到另一增益状态的特定接收信号电平。 可以基于信道条件动态地选择切换点，其可以由干扰的存在或不存在或强度或频率来表征。 当检测到干扰时，可以选择第一组切换点，并且当没有检测到干扰时可以选择第二组切换点。 增益状态根据选择使用的开关点集合进行选择。

    LO GENERATION WITH DESKEWED INPUT OSCILLATOR SIGNAL
    10.
    发明申请
    LO GENERATION WITH DESKEWED INPUT OSCILLATOR SIGNAL 失效
    LO生成与输入振荡器信号

    公开(公告)号：US20100120390A1

    公开(公告)日：2010-05-13

    申请号：US12270764

    申请日：2008-11-13

    申请人： Vinod V. Panikkath ,  Prasad S. Gudem ,  Steven C. Ciccarelli

    发明人： Vinod V. Panikkath ,  Prasad S. Gudem ,  Steven C. Ciccarelli

    IPC分类号： H04B1/16

    CPC分类号： H03B19/12 ,  G01R13/02 ,  H03B27/00 ,  H03D7/16

    摘要： Techniques for generating local oscillator (LO) signals are described. In one design, an apparatus may include a deskew circuit and a divider circuit. The deskew circuit may receive a differential input oscillator signal having timing skew and provide a differential output oscillator signal having reduced timing skew. The differential input oscillator signal may include first and second input oscillator signals, and the differential output oscillator signal may include first and second output oscillator signals. In one design, the deskew circuit may include first and second variable delay circuits that receive the first and second input oscillator signals, respectively, and provide the first and second output oscillator signals, respectively. Each output oscillator signal may have an adjustable delay selected to reduce timing skew. The divider circuit may divide the differential output oscillator signal in frequency and provide differential I and Q divided signals, which may be used to generate LO signals.

    摘要翻译： 描述用于产生本地振荡器（LO）信号的技术。 在一种设计中，设备可以包括去歪斜电路和分频器电路。 偏移电路可以接收具有定时偏移的差分输入振荡器信号，并提供具有减小的定时偏移的差分输出振荡器信号。 差分输入振荡器信号可以包括第一和第二输入振荡器信号，并且差分输出振荡器信号可以包括第一和第二输出振荡器信号。 在一种设计中，歪斜电路可以包括分别接收第一和第二输入振荡器信号的第一和第二可变延迟电路，并分别提供第一和第二输出振荡器信号。 每个输出振荡器信号可以具有选择的可调延迟以减少定时偏移。 分频器电路可以分频差分输出振荡器信号，并提供差分I和Q分频信号，可用于产生LO信号。