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111 条记录 (耗时 0.031 秒)

    Dual power mode transmitter
    51.
    发明申请
    Dual power mode transmitter 审中-公开
    双电源模式发射机

    公开(公告)号：US20070270111A1

    公开(公告)日：2007-11-22

    申请号：US11495675

    申请日：2006-07-31

    申请人： Meng-An Pan

    发明人： Meng-An Pan

    IPC分类号： H04B1/04 ,  H01Q11/12

    CPC分类号： H03G3/3047 ,  H03F3/45188 ,  H03F2203/45364 ,  H03F2203/45371 ,  H03F2203/45638 ,  H03G1/0029 ,  H03G3/3042

    摘要： A dual power mode transmitter is provided to save power when the transmitter switches from normal operating mode to low power operating mode. The dual power mode transmitter achieves power savings by controlling the amount of current draw in the input stage. Alternatively, the transmitter saves power by regulating the voltage at the output node of the input stage.

    摘要翻译： 当发射机从正常工作模式切换到低功率工作模式时，提供一个双电源模式发射器来节省电力。 双功率模式发射器通过控制输入级中的电流消耗量来实现功率节省。 或者，发射器通过调节输入级的输出节点处的电压来节省功率。

    Wireless transmitter having multiple programmable gain amplifiers (PGAs) with tuned impedance to provide substantially linear magnitude and phase responses
    52.
    发明授权
    Wireless transmitter having multiple programmable gain amplifiers (PGAs) with tuned impedance to provide substantially linear magnitude and phase responses 失效
    无线发射机具有具有调谐阻抗的多个可编程增益放大器（PGA），以提供基本上线性的幅度和相位响应

    公开(公告)号：US07183858B2

    公开(公告)日：2007-02-27

    申请号：US11094272

    申请日：2005-03-31

    申请人： Meng-An Pan

    发明人： Meng-An Pan

    IPC分类号： H03F3/191

    CPC分类号： H04B1/0483

    摘要： A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second programmable gain amplifiers (PGAs). The first PGA is tuned to have a resonant frequency that is less than an operating frequency of the first PGA. The second PGA is tuned to have a resonant frequency that is greater than an operating frequency of the second PGA. A magnitude response at an output of the first PGA and a magnitude response at an output of the second PGA combine to provide a substantially linear magnitude response across a frequency range that includes the operating frequency of the first or second PGA. According to an embodiment, the first and second PGAs have the same operating frequency.

    摘要翻译： 提供了一种方法和装置，用于使得发射机具有基本线性的幅度响应和基本上线性的相位响应。 发射机包括第一和第二可编程增益放大器（PGA）。 第一个PGA调谐为具有小于第一个PGA的工作频率的谐振频率。 第二PGA调谐为具有大于第二PGA的工作频率的谐振频率。 在第一PGA的输出处的幅度响应和在第二PGA的输出处的幅度响应组合以在包括第一或第二PGA的工作频率的频率范围内提供基本上线性的幅度响应。 根据实施例，第一和第二PGA具有相同的工作频率。

    Single side band transmitter having reduced DC offset
    53.
    发明授权
    Single side band transmitter having reduced DC offset 失效
    具有降低的DC偏移的单边带发射机

    公开(公告)号：US07103327B2

    公开(公告)日：2006-09-05

    申请号：US10173740

    申请日：2002-06-18

    申请人： Meng-An Pan

    发明人： Meng-An Pan

    IPC分类号： H04B1/06

    CPC分类号： H04B1/0475

    摘要： A single side band transmitter having reduced DC offset includes a current source modulation module, a current mirror module, a 1st mixing module, a 2nd mixing module, a summing module, and a power amplifier. The current source module is operably coupled to modulate, in accordance with a modulation protocol (e.g., FSK) data to produce an in-phase current component and a quadrature current component. The current mirror module is operably coupled to mirror the in-phase current component to produce a mirrored in-phase current component and is also operably coupled to mirror the quadrature current component to produce a mirrored quadrature current component. The 1st mixing module is operably coupled to mix the mirrored in-phase current component with an in-phase current component of a local oscillation to produce a 1st mixed current signal. The 2nd mixing module is operably coupled to mix the mirrored quadrature current component with a quadrature component of the local oscillation to produce a 2nd mixed current signal. The summing module is operably coupled to sum the 1st and 2nd mixed current signals to produce an up converted signal. The power amplifier amplifies the up converted signal prior to transmission as a radio frequency signal.

    摘要翻译： 具有减小的DC偏移的单个边带发射器包括电流源调制模块，电流镜模块，混合模块，混合模块2，混合模块，求和模块 和功率放大器。 电流源模块可操作地耦合以根据调制协议（例如，FSK）数据进行调制以产生同相电流分量和正交电流分量。 电流镜模块可操作地耦合以镜像同相电流分量以产生镜像的同相电流分量，并且还可操作地耦合以镜像正交电流分量以产生镜像正交电流分量。 混合模块可操作地耦合以将镜像的同相电流分量与本地振荡的同相电流分量混合以产生第一混合电流信号 。 混合模块可操作地耦合以将镜像正交电流分量与本地振荡的正交分量混合以产生第二混合电流信号。 求和模块可操作地耦合以对第一和第二和/或第二混合电流信号求和以产生上变频信号。 功率放大器在传输之前放大上变频信号作为射频信号。

    Method and system to prevent harmonics from causing distortion in a communications system
    57.
    发明授权
    Method and system to prevent harmonics from causing distortion in a communications system 有权
    防止谐波在通信系统中引起失真的方法和系统

    公开(公告)号：US08639197B2

    公开(公告)日：2014-01-28

    申请号：US12079389

    申请日：2008-03-25

    申请人： Meng-An Pan

    发明人： Meng-An Pan

    IPC分类号： H04B1/04 ,  H04B17/00

    CPC分类号： H04B17/10

    摘要： According to one exemplary embodiment, a method of preventing harmonics from causing distortion in a communications system includes feeding a test signal through a pre-distortion circuit in the communications system to a transmitter in the communications system. The method continues by transmitting a distorted output signal produced by the transmitter to an analyzer, analyzing the distorted output signal to identify one or more undesired harmonics, and generating and sending calibration data from the analyzer to calibrate the pre-distortion circuit, thereby preventing the one or more undesired harmonics from causing distortion in the communications system. In one embodiment, a system to prevent harmonics from causing distortion in a communications system includes a pre-distortion circuit, a transmitter, and an analyzer configured to identify one or more undesired harmonics and to generate and send calibration data to prevent the undesired harmonics from causing distortion.

    摘要翻译： 根据一个示例性实施例，一种防止谐波在通信系统中引起失真的方法包括将通信系统中的预失真电路的测试信号馈送到通信系统中的发射机。 该方法通过将由发射器产生的失真的输出信号发送到分析器来继续，分析失真的输出信号以识别一个或多个不需要的谐波，以及从分析器产生和发送校准数据以校准预失真电路，从而防止 一个或多个不需要的谐波从而导致通信系统中的失真。 在一个实施例中，防止谐波在通信系统中引起失真的系统包括预失真电路，发射器和分析器，其被配置为识别一个或多个不期望的谐波，并且生成和发送校准数据以防止不期望的谐波 造成失真。

    Method and system for transmitter output power compensation
    58.
    发明授权
    Method and system for transmitter output power compensation 有权
    发射机输出功率补偿方法和系统

    公开(公告)号：US08548390B2

    公开(公告)日：2013-10-01

    申请号：US12751836

    申请日：2010-03-31

    申请人： Meng-An Pan

    发明人： Meng-An Pan

    IPC分类号： H04B1/00

    CPC分类号： H04B1/036

    摘要： Aspects of compensating for transmitter output power may comprise sampling an on-chip transmitter circuit temperature at various time instants and determining a feedback temperature compensation value. At least one digital-to-analog converter may be adjusted by utilizing the feedback temperature compensation value, which may correspond to the sampled temperature. The digital-to-analog converter may be an I-component digital-to-analog converter and/or a Q-component digital-to-analog converter. At least a portion of the on-chip transmitter circuit may be characterized to determine power output dependence of the on-chip transmitter circuit on temperature variation of the on-chip transmitter circuit. Based on this characterization, a feedback temperature compensation value that may correspond to the sampled temperature may be used to adjust the digital-to-analog converter. The feedback temperature compensation value may be, for example, from a lookup table or an algorithm.

    摘要翻译： 补偿发射机输出功率的方面可以包括在不同时刻对片上发射机电路温度进行采样，并确定反馈温度补偿值。 可以通过利用可对应于采样温度的反馈温度补偿值来调节至少一个数模转换器。 数模转换器可以是I分量数模转换器和/或Q分量数模转换器。 片上发射机电路的至少一部分可以被表征为确定片上发射机电路对片上发射机电路的温度变化的功率输出依赖性。 基于该特征，可以使用可对应于采样温度的反馈温度补偿值来调整数模转换器。 反馈温度补偿值可以是例如来自查找表或算法的。

    Method and system for output common mode control for reducing DC offset for an IF mixer that downconverts a received signal to DC without introducing additional offset
    59.
    发明授权
    Method and system for output common mode control for reducing DC offset for an IF mixer that downconverts a received signal to DC without introducing additional offset 有权
    用于减少IF混频器的直流偏移的输出共模控制方法和系统，其将接收信号下变频到直流而不引入附加偏移

    公开(公告)号：US08437724B2

    公开(公告)日：2013-05-07

    申请号：US10977874

    申请日：2004-10-29

    申请人： Meng-An Pan

    发明人： Meng-An Pan

    IPC分类号： H04B1/10

    CPC分类号： H03D7/1441 ,  H03D3/008 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/0033 ,  H03D2200/0047 ,  H03D2200/0084

    摘要： A method and system for output common mode control for reducing DC offset for an IF mixer that downconverts a received signal to DC without introducing additional offset is provided. Aspects of the method may comprise averaging signals having an output common mode DC level, which are generated from an output of the mixer. This determined average may then be compared to a reference voltage. The reference voltage may be an output common mode DC level required for baseband processing. The output common mode DC level may be corrected at an input of the mixer for signals that may subsequently be generated from an output of the mixer by utilizing results from the comparison. The corrected common mode DC offset level may be fed back to an input of the mixer.

    摘要翻译： 提供了一种用于输出共模控制的方法和系统，用于减少用于将接收信号下变频到DC而不引入附加偏移的IF混频器的DC偏移。 该方法的方面可以包括平均具有从混频器的输出产生的输出共模DC电平的信号。 然后将该确定的平均值与参考电压进行比较。 参考电压可以是基带处理所需的输出共模DC电平。 输出共模DC电平可以在混频器的输入处被校正，用于随后可以通过利用比较结果从混频器的输出产生信号。 校正的共模DC偏移电平可以被反馈到混频器的输入端。