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10 条记录 (耗时 0.03 秒)

    Pipelined ADC inter-stage error calibration
    3.
    发明授权
    Pipelined ADC inter-stage error calibration 有权
    流水线ADC级间误差校准

    公开(公告)号：US08451152B2

    公开(公告)日：2013-05-28

    申请号：US13032457

    申请日：2011-02-22

    申请人： Kun Shi ,  Charles Sestok ,  Patrick Satarzadeh ,  Arthur J. Redfern

    发明人： Kun Shi ,  Charles Sestok ,  Patrick Satarzadeh ,  Arthur J. Redfern

    IPC分类号： H03M1/06

    CPC分类号： H03M1/1033 ,  H03M1/123 ,  H03M1/164

    摘要： An analog-to-digital converter (ADC) is provided. The ADC includes a plurality of pipelined ADCs and an adjustment circuit. Each pipelined ADC is adapted to receive an analog input signal, has an adjustable transfer function, and includes a compensator. The adjustment circuit is coupled to each pipelined ADC to be able to adjust the transfer function for each pipelined ADC so as to generally eliminate an estimation ambiguity. Additionally, the adjustment circuit estimates an inter-stage error that includes at least one of an inter-stage gain error and a DAC gain error and adjusts the compensator for each pipelined ADC to compensate for the inter-stage error.

    摘要翻译： 提供了一个模拟 - 数字转换器（ADC）。 ADC包括多个流水线ADC和调整电路。 每个流水线ADC适于接收模拟输入信号，具有可调节的传递函数，并且包括补偿器。 调整电路耦合到每个流水线ADC，以便能够调整每个流水线ADC的传递函数，以便通常消除估计模糊度。 此外，调节电路估计包括级间增益误差和DAC增益误差中的至少一个的级间误差，并且调整每个流水线ADC的补偿器以补偿级间误差。

    PIPELINED ADC INTER-STAGE ERROR CALIBRATION
    4.
    发明申请
    PIPELINED ADC INTER-STAGE ERROR CALIBRATION 有权
    管道ADC内部错误校准

    公开(公告)号：US20120212358A1

    公开(公告)日：2012-08-23

    申请号：US13032457

    申请日：2011-02-22

    申请人： Kun Shi ,  Charles Sestok ,  Patrick Satarzadeh ,  Arthur J. Redfern

    发明人： Kun Shi ,  Charles Sestok ,  Patrick Satarzadeh ,  Arthur J. Redfern

    IPC分类号： H03M1/06

    CPC分类号： H03M1/1033 ,  H03M1/123 ,  H03M1/164

    摘要： An analog-to-digital converter (ADC) is provided. The ADC includes a plurality of pipelined ADCs and an adjustment circuit. Each pipelined ADC is adapted to receive an analog input signal, has an adjustable transfer function, and includes a compensator. The adjustment circuit is coupled to each pipelined ADC to be able to adjust the transfer function for each pipelined ADC so as to generally eliminate an estimation ambiguity. Additionally, the adjustment circuit estimates an inter-stage error that includes at least one of an inter-stage gain error and a DAC gain error and adjusts the compensator for each pipelined ADC to compensate for the inter-stage error.

    摘要翻译： 提供了一个模拟 - 数字转换器（ADC）。 ADC包括多个流水线ADC和调整电路。 每个流水线ADC适于接收模拟输入信号，具有可调节的传递函数，并且包括补偿器。 调整电路耦合到每个流水线ADC，以便能够调整每个流水线ADC的传递函数，以便通常消除估计模糊度。 此外，调节电路估计包括级间增益误差和DAC增益误差中的至少一个的级间误差，并且调整每个流水线ADC的补偿器以补偿级间误差。

    Method to determine RF circuit antenna impedance
    5.
    发明授权
    Method to determine RF circuit antenna impedance 有权
    确定RF电路天线阻抗的方法

    公开(公告)号：US08750816B2

    公开(公告)日：2014-06-10

    申请号：US13569921

    申请日：2012-08-08

    申请人： Charles Sestok ,  Kun Shi

    发明人： Charles Sestok ,  Kun Shi

    IPC分类号： H04B17/00

    CPC分类号： H04B17/12

    摘要： A process of estimating an admittance of an RF component using a ladder network with alternating series and parallel components by making three VSWR measurements and computing three admittance circle solutions in the complex admittance plane. The admittances circles are transformed through reference planes of the ladder network to obtain three RF component admittance circles, then estimating the RF component admittance using three nearest intersections of the three RF component admittance circles. Reference planes are defined immediately upstream and immediately downstream of each component of the ladder network. The transforms are performed using lumped parameter models of the series and parallel components of the ladder network.

    摘要翻译： 使用具有交替串联和并联组件的梯形网络来估计RF分量的导纳的过程，通过进行三个VSWR测量并在复导纳平面中计算三个导纳圆解。 通过梯形网络的参考平面转换导纳圆以获得三个RF分量导纳圆，然后使用三个RF分量导纳圆的三个最近的交点来估计RF分量导纳。 参考平面紧紧地定位在梯形网络的每个部件的上游和紧邻的下游。 使用梯形网络的串联和并联组件的集总参数模型来执行变换。

    METHOD TO DETERMINE RF CIRCUIT ANTENNA IMPEDANCE
    6.
    发明申请
    METHOD TO DETERMINE RF CIRCUIT ANTENNA IMPEDANCE 有权
    确定射频电路天线阻抗的方法

    公开(公告)号：US20130040593A1

    公开(公告)日：2013-02-14

    申请号：US13569921

    申请日：2012-08-08

    申请人： Charles Sestok ,  Kun Shi

    发明人： Charles Sestok ,  Kun Shi

    IPC分类号： H04B17/00

    CPC分类号： H04B17/12

    摘要： A process of estimating an admittance of an RF component using a ladder network with alternating series and parallel components by making three VSWR measurements and computing three admittance circle solutions in the complex admittance plane. The admittances circles are transformed through reference planes of the ladder network to obtain three RF component admittance circles, then estimating the RF component admittance using three nearest intersections of the three RF component admittance circles. Reference planes are defined immediately upstream and immediately downstream of each component of the ladder network. The transforms are performed using lumped parameter models of the series and parallel components of the ladder network.

    摘要翻译： 使用具有交替串联和并联组件的梯形网络来估计RF分量的导纳的过程，通过进行三个VSWR测量并在复导纳平面中计算三个导纳圆解。 通过梯形网络的参考平面转换导纳圆以获得三个RF分量导纳圆，然后使用三个RF分量导纳圆的三个最近的交点来估计RF分量导纳。 参考平面紧紧地定位在梯形网络的每个部件的上游和紧邻的下游。 使用梯形网络的串联和并联组件的集总参数模型来执行变换。

    Robust transmit/feedback alignment
    8.
    发明授权
    Robust transmit/feedback alignment 有权
    稳健的发射/反馈对准

    公开(公告)号：US08437424B2

    公开(公告)日：2013-05-07

    申请号：US12718152

    申请日：2010-03-05

    申请人： Fernando A. Mujica ,  Hardik P. Gandhi ,  Kun Shi

    发明人： Fernando A. Mujica ,  Hardik P. Gandhi ,  Kun Shi

    IPC分类号： H04K1/02 ,  H04L25/03 ,  H04L25/49

    CPC分类号： H04L25/03343

    摘要： Performing digital predistortion (DPD) for widely spaced narrowband signals, such as the signal used in multi-carrier GSM, can be very difficult. Here, a system is provided the performs DPD for widely spaced narrowband signals. In particular, this system uses a polynomial curve for values of a cross-correlation function (above a predetermined threshold) to determine a delay estimate, which allows for a more robust and accurate system.

    摘要翻译： 对于广泛间隔的窄带信号（例如在多载波GSM中使用的信号）执行数字预失真（DPD）可能是非常困难的。 这里，提供了一种用于宽间隔窄带信号的DPD的系统。 特别地，该系统使用用于互相关函数（高于预定阈值）的值的多项式曲线来确定延迟估计，其允许更健壮和准确的系统。

    ROBUST TRANSMIT/FEEDBACK ALIGNMENT
    9.
    发明申请
    ROBUST TRANSMIT/FEEDBACK ALIGNMENT 有权
    鲁棒发送/反馈对齐

    公开(公告)号：US20110216851A1

    公开(公告)日：2011-09-08

    申请号：US12718152

    申请日：2010-03-05

    申请人： Fernando A. Mujica ,  Hardik P. Gandhi ,  Kun Shi

    发明人： Fernando A. Mujica ,  Hardik P. Gandhi ,  Kun Shi

    IPC分类号： H04L25/49 ,  H04L25/03

    CPC分类号： H04L25/03343

    摘要： Performing digital predistortion (DPD) for widely spaced narrowband signals, such as the signal used in multi-carrier GSM, can be very difficult. Here, a system is provided the performs DPD for widely spaced narrowband signals. In particular, this system uses a polynomial curve for values of a cross-correlation function (above a predetermined threshold) to determine a delay estimate, which allows for a more robust and accurate system.

    摘要翻译： 对于广泛间隔的窄带信号（例如在多载波GSM中使用的信号）执行数字预失真（DPD）可能是非常困难的。 这里，提供了一种用于宽间隔窄带信号的DPD的系统。 特别地，该系统使用用于互相关函数（高于预定阈值）的值的多项式曲线来确定延迟估计，其允许更健壮和准确的系统。