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    • 5. 发明授权
    • Double-point modulator with accurate and fast gain calibration
    • 具有精确和快速增益校准的双点调制器
    • US08884709B2
    • 2014-11-11
    • US13547594
    • 2012-07-12
    • Franck BadetsSerge RametMichel Ayraud
    • Franck BadetsSerge RametMichel Ayraud
    • H03C3/06H03C3/09
    • H03C3/0908
    • A phase-locked loop double-point modulator may include a frequency divider having a ratio which can be changed by a first modulation signal, and an oscillator, a frequency of which can be changed by a second modulation signal correlated to the first modulation signal. A calibration circuit may be configured, in a calibration mode, to match the gains of the first and second modulation signals based on frequency measurements of the oscillator for two different calibration values of the second modulation signal. The phase-locked double-point modulator may also include an attenuator having a constant ratio greater than 1 and placed in the path of the second modulation signal, and a selector switch configured to be controlled by the calibration circuit to reduce the ratio of the attenuator in the calibration mode.
    • 锁相环双点调制器可以包括具有可以通过第一调制信号改变的比率的分频器和可以通过与第一调制信号相关的第二调制信号来改变其频率的振荡器。 校准电路可以在校准模式下被配置为基于用于第二调制信号的两个不同校准值的振荡器的频率测量来匹配第一和第二调制信号的增益。 锁相双点调制器还可以包括具有大于1的恒定比率并置于第二调制信号的路径中的衰减器,以及配置为由校准电路控制的选择器开关,以减小衰减器 在校准模式下。
    • 7. 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。
    • 9. 发明申请
    • DOUBLE-POINT MODULATOR WITH ACCURATE AND FAST GAIN CALIBRATION
    • 具有精确和快速增益校准的双点调制器
    • US20130015892A1
    • 2013-01-17
    • US13547594
    • 2012-07-12
    • Franck BadetsSerge RametMichel Ayraud
    • Franck BadetsSerge RametMichel Ayraud
    • H03B19/00H03L7/08
    • H03C3/0908
    • A phase-locked loop double-point modulator may include a frequency divider having a ratio which can be changed by a first modulation signal, and an oscillator, a frequency of which can be changed by a second modulation signal correlated to the first modulation signal. A calibration circuit may be configured, in a calibration mode, to match the gains of the first and second modulation signals based on frequency measurements of the oscillator for two different calibration values of the second modulation signal. The phase-locked double-point modulator may also include an attenuator having a constant ratio greater than 1 and placed in the path of the second modulation signal, and a selector switch configured to be controlled by the calibration circuit to reduce the ratio of the attenuator in the calibration mode.
    • 锁相环双点调制器可以包括具有可以通过第一调制信号改变的比率的分频器和可以通过与第一调制信号相关的第二调制信号来改变其频率的振荡器。 校准电路可以在校准模式下被配置为基于用于第二调制信号的两个不同校准值的振荡器的频率测量来匹配第一和第二调制信号的增益。 锁相双点调制器还可以包括具有大于1的恒定比率并置于第二调制信号的路径中的衰减器,以及配置为由校准电路控制的选择器开关,以减小衰减器 在校准模式下。
    • 10. 发明申请
    • DIGITAL FREQUENCY SYNTHESIZER
    • 数字频率合成器
    • US20090128198A1
    • 2009-05-21
    • US12254617
    • 2008-10-20
    • Franck BadetsThomas Finateu
    • Franck BadetsThomas Finateu
    • H03B21/00
    • H03K5/135H03K5/156
    • A digital frequency synthesizer receiving a first signal corresponding to a periodic sequence of first pulses at a first frequency and providing a second signal corresponding to a periodic sequence of second pulses at a second frequency. The synthesizer includes a first circuit clocked by a third signal corresponding to a sequence of third pulses and obtained from the first signal, the first circuit providing a fourth digital signal which, for any set of third successive pulses, increases (decreases) on each pulse and decreases (increases) at the end of said set; and a second circuit receiving the first and fourth signals and providing, for each first pulse from among some at least of the first pulses, a second pulse which is shifted with respect to the first pulse by a duration which depends on the fourth signal.
    • 数字频率合成器,以第一频率接收对应于第一脉冲的周期性序列的第一信号,并提供对应于第二频率的第二脉冲的周期性序列的第二信号。 合成器包括由第三信号对应的第三信号的第一电路,该信号对应于从第一信号获得的第三脉冲序列,第一电路提供第四数字信号,对于任何一组第三连续脉冲,在每个脉冲上增加(减小) 并在所述集合的末尾减小(增加); 以及第二电路,接收所述第一和第四信号,并且对于所述第一脉冲中的至少一些中的每个第一脉冲提供相对于所述第一脉冲移位了取决于所述第四信号的持续时间的第二脉冲。