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    • 1. 发明授权
    • Input stage for a CTD low-pass filter
    • CTD低通滤波器的输入级
    • US4145676A
    • 1979-03-20
    • US788779
    • 1977-04-19
    • Roger Benoit-GoninJean L. BergerSylvain Fontanes
    • Roger Benoit-GoninJean L. BergerSylvain Fontanes
    • H01L21/339H01L29/76H01L29/762H01L29/768H01L29/772H01L29/78H03H15/02H03H7/28G11C19/28H01L27/10
    • H01L29/76808H03H15/02
    • An input stage for a transversal charge transfer filter, which suppresses parasitic image frequencies. It comprises two parallel channels to which the input signal is applied simultaneously. Sampling of the signal is performed in each channel with a periodicity Te, and a relative phase-shift of Te/2. The two samples are then added in order to eliminate components having periodicities in the neighborhood of Te. The present invention relates to low-pass filters using the phenomenon of electrical charge transfer occurring in a semiconductor. It relates more particularly to an input stage for this kind of CTD (Charge Transfer Device) filter, which attenuates parasitic frequencies. The design of CTD low-pass filters, often referred to as transversal filters, poses a classic problem due to the fact that the input stage is a sampling stage. In other words, when the input signal contains a component of frequency Fs close to the sampling frequency Fe, by a process of frequency mixing, two parasitic signals at the image frequencies Fe + Fs and Fe - Fs are created. Since we are concerned with a low-pass filter, the top image frequency (Fe + Fs) is automatically eliminated but the bottom image frequency (Fe - Fs) can be transmitted by the filter and appear in the output signal if the condition Fe - Fs
    • 用于横向电荷转移滤波器的输入级,其抑制寄生图像频率。 它包括同时施加输入信号的两个并行通道。 在每个通道中以周期Te执行信号的采样,并且执行Te / 2的相对相移。 然后添加两个样品以消除在Te附近具有周期性的组分。
    • 4. 发明授权
    • Method of digitally evaluating the frequency and the phase of signals,
and a device for implementing such a method
    • 对信号的频率和相位进行数字评估的方法,以及用于实现这种方法的装置
    • US4954961A
    • 1990-09-04
    • US197251
    • 1988-05-23
    • Sylvain FontanesPatrice BirotAndre MarguinaudThierry QuignonBrigitte Romann
    • Sylvain FontanesPatrice BirotAndre MarguinaudThierry QuignonBrigitte Romann
    • G01R23/02G01R25/00H03H17/02
    • G01R23/02G01R25/00
    • A method of digitally evaluating the frequency and the phase of signals in the form of digitized samples, the method being wherein it comprises in succession:a stage during which numbers corresponding to the samples of the signal to be analyzed are processed in order to convert them into the form of an analytic signal whose real portion coincides with said signal to be analyzed; and, in parallel therewith:a stage of estimating the parameters to be analyzed which is performed in an overall manner on the basis of estimators and of selection criteria by working on the phase of the signal without using any operator of the Fourier transform type or any hypothesis test either separately or simultaneously; anda stage of estimating the differences between the real signal as taken in this way and the signal obtained from the estimated parameters, thereby making it possible to deliver data in digital form relating to the quality of the analyzed signal and to the reliability of the estimated values. The invention is applicable, in particular, to microwaves.
    • 以数字化样本的形式对信号的频率和相位进行数字评估的方法,其方法是连续地包括:处理与待分析信号的样本相对应的数字的阶段,以便对它们进行转换 成为分析信号的形式,其实际部分与要分析的信号一致; 并且与此并行:在不使用傅立叶变换类型的任何算子或者任意的任何运算符的情况下,通过对信号的相位进行工作来估计基于估计器和选择标准以总体方式进行分析的参数的阶段 假设检验单独或同时进行; 以及估计以这种方式获得的实际信号与从估计参数获得的信号之间的差异的阶段,从而使得可以以与分析的信号的质量相关的数字形式传送数据以及估计的信号的可靠性 价值观。 本发明特别适用于微波。
    • 6. 发明授权
    • Multichannel digital modulator
    • 多通道数字调制器
    • US3969617A
    • 1976-07-13
    • US566512
    • 1975-04-08
    • Sylvain Fontanes
    • Sylvain Fontanes
    • H04J3/02H04L5/02H04L27/00H03C5/00
    • H04L5/02H04J3/02H04L27/00
    • In a modulator of the type including a memory in which coded binary words representative of samples of a cycle of a sinusoidal signal are stored, which coded words are used to synthesize the modulated signal, the bits of each input digital signal S.sub.i are grouped in groups of P.sub.i bits (P.sub.i .gtoreq.1) and the sampling of the groups is so performed that several samples of each group appear in the multiplexed signal resulting from the sampling. Each sample of each group causes the reading of a coded word. This process gives a wide range of possibilities as concerns the transmission speeds of the input channels and the choice of the carrier frequency and of the number of modulation levels for each modulated signal.
    • 在包括存储器的调制器中,其中存储代表正弦信号的周期的样本的编码的二进制字,使用哪个编码字来合成调制信号,每个输入数字信号Si的位被分组 的Pi位(Pi> / = 1),并且执行组的采样,使得每组的几个样本出现在由采样产生的多路复用信号中。 每组的每个样本导致读取编码字。 该过程给出了关于输入通道的传输速度和载波频率的选择以及每个调制信号的调制电平数量的广泛的可能性。
    • 9. 发明授权
    • Analog-digital coder comprising a charge transfer device
    • 模拟数字编码器,包括电荷转移装置
    • US4224605A
    • 1980-09-23
    • US963140
    • 1978-11-22
    • Claude MichaudSylvain Fontanes
    • Claude MichaudSylvain Fontanes
    • H03M1/14H03M1/00H03K13/02
    • H03M1/44
    • An analog-digital coder applicable for the coding of analog information in accordance with non-linear functions of compression such as the laws A and .mu. as set forth in the standards of the CCITT (International Telegraph and Telephone Consultative Committee). For non-linear coding the analog information is applied to an analog switch whose output signals are applied to an adder which also receives the output voltage of an amplifier. The output voltage of the adder is applied to a multiplier-analog memory which comprises a charge transfer device. Their output is coupled to the input of the amplifier. A comparator compares the output voltage of the multiplier-memory with a given voltage and controls a logic switching circuit which generates the coded output signal.
    • 根据CCITT(国际电话电话咨询委员会)标准中规定的A,μ等法律压缩的非线性函数,适用于模拟信号编码的模拟数字编码器。 对于非线性编码,模拟信息被施加到模拟开关,其模拟开关的输出信号被施加到也接收放大器的输出电压的加法器。 加法器的输出电压被施加到包括电荷转移装置的乘法器 - 模拟存储器。 它们的输出耦合到放大器的输入端。 比较器将乘法器存储器的输出电压与给定电压进行比较,并控制产生编码输出信号的逻辑开关电路。