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    • 6. 发明授权
    • System and method for low delay corrective feedback power amplifier control
    • 低延迟校正反馈功率放大器控制系统和方法
    • US07570928B2
    • 2009-08-04
    • US11771130
    • 2007-06-29
    • Rahul MagoonMorten DamgaardRoberto Aparicio JooScott D. KeeIchiro Aoki
    • Rahul MagoonMorten DamgaardRoberto Aparicio JooScott D. KeeIchiro Aoki
    • H04B1/66
    • H03G3/004H03F1/34H03F3/19H03F3/24H04B2001/0433
    • A system for controlling the power output of a power amplifier includes a power amplifier through which a transmit signal having an amplitude-modulated (AM) component and a phase-modulated (PM) component is passed and amplified, the power amplifier comprising a forward path, a feedback signal comprising a portion of the output of the power amplifier, a first control loop configured to receive the feedback signal and configured to apply an amplitude modulated (AM) signal to the power amplifier and configured to control the gain of the power amplifier, a second control loop configured to receive the feedback signal and configured to correct for offsets in the forward path and to linearize the first control loop; and a third control loop configured to receive the feedback signal and configured to control the phase of the PM component of the transmit signal.
    • 用于控制功率放大器的功率输出的系统包括:功率放大器,具有幅度调制(AM)分量和相位调制(PM)分量的发射信号通过该功率放大器通过并放大,所述功率放大器包括前向路径 ,包括功率放大器的输出的一部分的反馈信号;第一控制回路,被配置为接收反馈信号并被配置为将幅度调制(AM)信号施加到功率放大器并且被配置为控制功率放大器的增益 第二控制回路,被配置为接收所述反馈信号并被配置为校正所述正向通路中的偏移并且使所述第一控制回路线性化; 以及第三控制回路,被配置为接收所述反馈信号并被配置为控制所述发射信号的PM分量的相位。
    • 9. 发明授权
    • Wireless transmitter having a modified translation loop architecture
    • 具有修改的平移环结构的无线发射机
    • US06952569B2
    • 2005-10-04
    • US10370585
    • 2003-02-24
    • Morten DamgaardRahul Magoon
    • Morten DamgaardRahul Magoon
    • H03C3/09H03L7/18H03L7/185H04L27/00H03D3/29
    • H03C3/0983H03C3/0966H03L7/1806H03L7/185H04L2027/0016H04L2027/0018
    • A transmitter for a wireless handset having a modified translation loop architecture. The transmitter includes a VCO that generates a modulated transmit signal having a frequency fTx, and a modulated signal source that generates a modulated LO signal with a frequency fLO. A mixer mixes the transmit signal with the LO signal to produce an IF signal having a frequency fIF. A first divider divides the LO signal frequency fLO by an integer M to generate a first comparison signal having a frequency fCF. A second divider divides the IF signal frequency fIF, after it is multiplied by an integer K, by an integer N to generate a second comparison signal having a frequency fCF. The transmit and LO signal frequencies have the relationship f Tx = f LO ⁢ KM ± N M . A phase detector coupled to the first and second comparison signals compares the phases of the signals and outputs a control voltage to the VCO proportional to any phase differences between the signals.
    • 一种用于具有修改的平移环结构的无线手机的发射机。 发射机包括产生具有频率f Tx的调制的发射信号的VCO和产生具有频率为LO LO的调制LO信号的调制信号源。 混合器将发送信号与LO信号混合以产生具有频率f IF IF的IF信号。 第一分频器将LO信号频率f LO LO分频整数M以产生具有频率f CF1的第一比较信号。 第二分频器将IF信号频率f IF IF在乘以整数K之后除以整数N,以产生具有频率f CF1的第二比较信号。 发送和LO信号频率具有关系 f > Tx = 耦合到第一和第二比较信号的相位检测器比较信号的相位并输出控制 VCO的电压与信号之间的任何相位差成正比。