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    • 2. 发明授权
    • Voltage controlled oscillator
    • 压控振荡器
    • US07312670B2
    • 2007-12-25
    • US11143461
    • 2005-06-03
    • Lionel GeynetEmeric De Foucauld
    • Lionel GeynetEmeric De Foucauld
    • H03B5/00
    • H03B5/1243H03B5/1253H03B5/1265H03B5/1293
    • The voltage controlled oscillator comprises an oscillating system wherein two variable capacitors are alternately connected. The capacitances of these two capacitors vary respectively in the same direction as the voltage that is applied thereto and in the opposite direction. Replacing one variable capacitor by the other is performed automatically when the output frequency of the oscillator reaches a predetermined switching value. It is thus possible to divide an operating frequency band of the oscillator into at least two parts in which the frequency varies alternately in the same direction as the control voltage of the oscillator and in the opposite direction. Switchable fixed capacitors can be connected in the oscillating system, either when one variable capacitor is replaced by the other or by means of a command, to make the oscillator switch from one frequency band to a lower band.
    • 压控振荡器包括其中两个可变电容器交替连接的振荡系统。 这两个电容器的电容分别在与施加到其上的电压相反的方向上相反地改变。 当振荡器的输出频率达到预定切换值时,自动执行一个可变电容器的替换。 因此,可以将振荡器的工作频带分成至少两个部分,其中频率在与振荡器的控制电压和相反方向相同的方向上交替变化。 无论是在一个可变电容器被另一个可替换的情况下,还是借助于一个命令,可以在振荡系统中连接可切换的固定电容器,以使振荡器从一个频带切换到较低的频带。
    • 6. 发明申请
    • Voltage controlled oscillator with linear capacitance
    • 具有线性电容的压控振荡器
    • US20060017513A1
    • 2006-01-26
    • US11152075
    • 2005-06-15
    • Lionel GeynetEmeric De Foucauld
    • Lionel GeynetEmeric De Foucauld
    • H03B5/12
    • H03B5/1296H03B5/1206H03B5/124
    • The voltage controlled oscillator comprises an amplifier and an oscillating system comprising an inductor and a first and second variable capacitor connected in series, each having a capacitance varying according to its control voltage. The capacitance of one of the variable capacitors varies in the same direction as its control voltage and the capacitance of the other variable capacitor varies in the opposite direction to its control voltage. A capacitor having a fixed capacitance can be connected in series or in parallel with the first and second variable capacitors. The first and second variable capacitors are preferably formed by transistors, respectively of PMOS and NMOS type. An additional series of additional first and second variable capacitors can be connected in parallel with the first and second variable capacitors.
    • 压控振荡器包括放大器和包括电感器和串联连接的第一和第二可变电容器的振荡系统,每个电容器具有根据其控制电压而变化的电容。 可变电容器之一的电容在与其控制电压相同的方向上变化,另一个可变电容器的电容在与其控制电压相反的方向上变化。 具有固定电容的电容器可以与第一和第二可变电容器串联或并联连接。 第一和第二可变电容器优选地分别由PMOS和NMOS型晶体管形成。 附加的一系列附加的第一和第二可变电容器可以与第一和第二可变电容器并联连接。
    • 9. 发明授权
    • Radiofrequency emission or reception chain with automatic impedance adaptation, and corresponding method
    • 具有自动阻抗适应的射频发射或接收链,以及相应的方法
    • US08543071B2
    • 2013-09-24
    • US13440758
    • 2012-04-05
    • Majid El KaamouchiJean-Baptiste DavidEmeric De Foucauld
    • Majid El KaamouchiJean-Baptiste DavidEmeric De Foucauld
    • H04B17/00H04B1/04
    • H04B1/04H03H7/40
    • As relates to automatic matching of antenna impedance for a radiofrequency transmit or receive circuit, an impedance matching network is inserted between an amplifier and antenna. The current i and output (resp. input) voltage V of the amplifier and their phase shift are measured, the complex impedance defined by V/i is deduced; the impedance of the antenna is calculated as a function of this complex impedance and the known existing values of the adjustable impedances of the matching network. New adjustable values of impedances of the matching network to obtain a desired overall load impedance for the amplifier are calculated on the basis of the calculated antenna impedance value, and the matching network is controlled to adjust the adjustable impedances to these new values. The measurement is made at a measurement frequency different from the working frequency to allow automatic matching without interrupting normal operation of the chain.
    • 关于射频发射或接收电路的天线阻抗的自动匹配,在放大器和天线之间插入阻抗匹配网络。 测量放大器的当前i和输出(相应输入)电压V及其相移,推导出由V / i定义的复阻抗; 根据该复阻抗和匹配网络的可调阻抗的已知现有值计算天线的阻抗。 基于所计算的天线阻抗值计算匹配网络的阻抗的新的可调整值以获得放大器的所需总体负载阻抗,并且控制匹配网络以将可调阻抗调整到这些新值。 在与工作频率不同的测量频率进行测量,以允许自动匹配而不中断链条的正常操作。
    • 10. 发明授权
    • Voltage controlled oscillator with linear capacitance
    • 具有线性电容的压控振荡器
    • US07250824B2
    • 2007-07-31
    • US11152075
    • 2005-06-15
    • Lionel GeynetEmeric De Foucauld
    • Lionel GeynetEmeric De Foucauld
    • H03B5/12
    • H03B5/1296H03B5/1206H03B5/124
    • The voltage controlled oscillator comprises an amplifier and an oscillating system comprising an inductor and a first and second variable capacitor connected in series, each having a capacitance varying according to its control voltage. The capacitance of one of the variable capacitors varies in the same direction as its control voltage and the capacitance of the other variable capacitor varies in the opposite direction to its control voltage. A capacitor having a fixed capacitance can be connected in series or in parallel with the first and second variable capacitors. The first and second variable capacitors are preferably formed by transistors, respectively of PMOS and NMOS type. An additional series of additional first and second variable capacitors can be connected in parallel with the first and second variable capacitors.
    • 压控振荡器包括放大器和包括电感器和串联连接的第一和第二可变电容器的振荡系统,每个电容器具有根据其控制电压而变化的电容。 可变电容器之一的电容在与其控制电压相同的方向上变化,另一个可变电容器的电容在与其控制电压相反的方向上变化。 具有固定电容的电容器可以与第一和第二可变电容器串联或并联连接。 第一和第二可变电容器优选地分别由PMOS和NMOS型晶体管形成。 附加的一系列附加的第一和第二可变电容器可以与第一和第二可变电容器并联连接。