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    • 4. 发明授权
    • Modulated feedback loop analog-to-digital converter
    • 调制反馈回路模数转换器
    • US5565868A
    • 1996-10-15
    • US273802
    • 1994-07-12
    • Sabrina AzroufMaurice BellangerVincent BruneauFrederic Gourgue
    • Sabrina AzroufMaurice BellangerVincent BruneauFrederic Gourgue
    • H03M3/02H03M1/12
    • H03M3/41H03M3/43H03M3/456
    • The analog-to-digital converter receives an analog input signal (x(t)) to produce a digital error signal (y(t)).It comprises a subtractor (1) to calculate the difference between the input signal and a reference signal (Ur(t)), a converter subsystem (2, 3, 4) to produce the error signal from said difference and a feedback loop to produce the reference signal by means of a digital-to-analog converter (5) which delivers a comparison signal (Uc(t)) in response to the error signal.In accordance with the invention, the input signal (x(t)) is assigned a center frequency (f.sub.0), the feedback loop comprises a displacement unit (7) for displacing the frequency response of the digital-to-analog converter (5) from the null frequency towards the center frequency (f.sub.0), said displacement unit producing the reference signal (Ur(t)) from the comparison signal (Uc(t)).
    • 模拟 - 数字转换器接收模拟输入信号(x(t))以产生数字误差信号(y(t))。 它包括一个减法器(1),用于计算输入信号和参考信号(Ur(t))之间的差值,转换器子系统(2,3,4)以从所述差产生误差信号,以及反馈回路产生 通过数字 - 模拟转换器(5)的参考信号,其响应于误差信号传送比较信号(Uc(t))。 根据本发明,输入信号(x(t))被分配中心频率(f0),反馈回路包括用于移位数模转换器(5)的频率响应的位移单元(7) 从空频到中心频率(f0),所述位移单元根据比较信号(Uc(t))产生参考信号(Ur(t))。
    • 5. 发明授权
    • Amplifier bias control device
    • 放大器偏置控制装置
    • US5625322A
    • 1997-04-29
    • US386630
    • 1995-02-10
    • Frederic GourgueVeronique Soula
    • Frederic GourgueVeronique Soula
    • H03G3/30H03F1/02H03F1/30H03G1/04H03G3/20H03G5/16H03F1/26
    • H03G3/3042H03F1/0261H03F1/30H03G1/04
    • A device for controlling the biasing of an amplifier receives an input signal to be amplified and a bias signal and supplies an amplified output signal. The amplifier has at least two separate possible power output values and the amplified output signal is principally in a predetermined frequency band. The device includes a circuit for controlling the biasing of the amplifier which receives linearity control information and generates the bias signal in accordance with the linearity control information so that an actual out-band send level is substantially equal to the required out-band send level. The actual out-band send level is defined as a send level of the amplified output signal outside the predetermined frequency band. The required out-band send level is defined as a predetermined maximal out-band send threshold level for any of the separate possible output power values.
    • 用于控制放大器的偏置的装置接收要放大的输入信号和偏置信号,并提供放大的输出信号。 放大器具有至少两个可分离的功率输出值,并且放大的输出信号主要在预定的频带中。 该装置包括用于控制放大器的偏置的电路,其接收线性控制信息,并根据线性控制信息生成偏置信号,使得实际的带外发送电平基本上等于所需的带外发送电平。 实际的带外发送电平被定义为在预定频带之外的放大的输出信号的发送电平。 所需的带外发送电平被定义为任何单独的可能输出功率值的预定最大外带发送阈值电平。
    • 9. 发明授权
    • Device for correcting frequency shift due to the doppler effect in a
transmission system
    • 用于校正由于传输系统中的多普勒效应引起的频移的装置
    • US5471648A
    • 1995-11-28
    • US143749
    • 1993-11-01
    • Frederic Gourgue
    • Frederic Gourgue
    • H04B7/15H04B7/01H04B7/208H04B1/10H04B7/185H04J3/06
    • H04B7/208H04B7/01
    • The present invention relates to a device for correcting a frequency shift due to the Doppler effect in a transmission system. The device for correcting a frequency shift due to the Doppler effect is applicable to a transmission system in which a signal is transmitted in a transmission lobe between a transmitter and a receiver that are in relative motion. The frequency shift which is the difference between the frequency of the transmitted signal as measured at the receiver and as measured at the transmitter is presented as the sum of a center frequency characteristic of the transmission lobe plus a position frequency which is a function of the position of the receiver in the transmission lobe. The device includes means for tuning the receiver which has a tuning frequency such that said tuning frequency is equal to the sum of the transmitted frequency plus the center frequency.
    • 本发明涉及用于在传输系统中校正由于多普勒效应引起的频移的装置。 用于校正由于多普勒效应引起的频移的装置适用于在相对运动的发射机和接收机之间的发送波瓣中发送信号的发送系统。 作为在接收机处测得的发射信号的频率与在发射机处测得的发射信号的频率之间的差异的频移表示为传输波瓣的中心频率特性加上作为位置的函数的位置频率之和 的接收器在传输叶中。 该装置包括用于调谐具有调谐频率的接收机的装置,使得所述调谐频率等于发射频率加上中心频率之和。