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    • 3. 发明申请
    • RADIOFREQUENCY SIGNAL POWER AMPLIFICATION METHOD AND DEVICE
    • 无线电信号功率放大方法和装置
    • US20110018637A1
    • 2011-01-27
    • US12841803
    • 2010-07-22
    • Didier BelotLaurent LeyssenneEric KerherveYann Deval
    • Didier BelotLaurent LeyssenneEric KerherveYann Deval
    • H03G3/30H03F3/04
    • H03F3/245H03F1/0266H03F1/0272H03F2200/102H03F2200/451
    • A radiofrequency signal power amplification circuit may include a signal input for receiving the radiofrequency signal, an amplification stage coupled to the signal input and having at least one power transistor, a biasing stage for delivering a bias voltage to the amplification stage, and a processing stage. The processing stage may include a processing input coupled to the signal input, a processing output for delivering a bias current modulated at least in amplitude to the biasing stage, and an amplitude modulator coupled between the processing input and the processing output and configured to determine an envelope signal representative of the envelope of the radiofrequency signal, for modulating the amplitude of the envelope signal based on a variable voltage setpoint and for generating the amplitude-modulated bias current based on the modulated envelope signal.
    • 射频信号功率放大电路可以包括用于接收射频信号的信号输入,耦合到信号输入并具有至少一个功率晶体管的放大级,用于将偏置电压传送到放大级的偏置级,以及处理级 。 处理阶段可以包括耦合到信号输入的处理输入,用于将至少以幅度调制的偏置电流传送到偏置级的处理输出以及耦合在处理输入和处理输出之间的幅度调制器,并被配置为确定 信号代表射频信号的包络线,用于基于可变电压设定点调制包络信号的幅度,并且用于基于经调制的包络信号产生幅度调制的偏置电流。
    • 10. 发明授权
    • Phase locked loop
    • 锁相环
    • US07315214B2
    • 2008-01-01
    • US11400062
    • 2006-04-07
    • Franck BadetsDidier BelotVincent LagaresteYann DevalPierre MelchiorJean-Baptiste Begueret
    • Franck BadetsDidier BelotVincent LagaresteYann DevalPierre MelchiorJean-Baptiste Begueret
    • H03L7/00H03L7/07H03L7/087
    • H03L7/093H03L7/087H03L7/0893H03L7/18H03L2207/06
    • A phase locked loop includes a controlled oscillator for delivering an output signal at a determined output frequency, and a variable frequency divider for converting the output signal into a signal at divided frequency. The PLL is termed composite in that it includes at least one first loop having a loop filter for generating a first control signal for the oscillator on the basis of the signal at divided frequency, and a second loop having a loop filter, different from the loop filter of the first loop, for generating, on the basis of the signal at divided frequency, a second signal for additional control of the oscillator. The loop filter of the first loop and the loop filter of the second loop have different respective cutoff frequencies. The passband of the first loop, can be adapted to ensure the convergence and the stability of the PLL, while the second loop can afford extra passband increasing the speed of adaptation of the PLL in case of modification of the value of a preset for the output frequency.
    • 锁相环包括用于以确定的输出频率输出输出信号的受控振荡器和用于将输出信号转换为分频的信号的可变分频器。 PLL被称为复合,因为它包括至少一个具有环路滤波器的第一环路,该环路滤波器基于分频频率的信号产生用于振荡器的第一控制信号,以及具有不同于环路的环路滤波器的第二环路 滤波器,用于基于分频后的信号产生用于对振荡器进行附加控制的第二信号。 第一回路的环路滤波器和第二回路的环路滤波器具有不同的各自的截止频率。 第一个环路的通带可以适应于确保PLL的收敛和稳定性,而第二个环路可以提供额外的通带,在修改输出预置值的情况下可以提高PLL的自适应速度 频率。