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    • 2. 发明授权
    • Active filter resonator and system and negative resistance generator
usable therein
    • 有源滤波器谐振器和系统及负电阻发生器可用于其中
    • US5451915A
    • 1995-09-19
    • US69298
    • 1993-05-26
    • Peter J. KatzinYalcin AyasliBrian E. Bedard
    • Peter J. KatzinYalcin AyasliBrian E. Bedard
    • H03B1/00H03B5/12H03B7/06H03H5/12H03H11/52H03J3/04H03H11/04
    • H03L7/0805H03B5/1203H03B5/1228H03B5/1243H03H11/52H03H5/12H03J3/04H03B2200/004H03B2200/0086H03B2201/0208H03B2201/036H03B7/06
    • A negative resistance generator includes first and second terminals; first and second inductors connected in series between the terminals; and a semiconductor amplifying device having a first control electrode connected to the first terminal and a first active electrode connected to the second terminal and a second active electrode connected to the junction of the inductors. When employed in an active filter resonator a first variable capacitor is interconnected with the inductors for setting the resonant frequency of the resonator. The resonators may be combined in an active filter with a transmission line where each of the resonators is interconnected to the line by decreasing resistance from the input to the output in order to balance the rf currents to which the resonators are subjected. An improved dual loop active filter control system is achieved by using a master oscillator that employs a resonator that is matched to the active filter resonator in the filter and servoing the frequency and Q-factor controls so that the drive signals are compensated for temperature drifts, manufacturing tolerances, and other problems while a buffer amplifier is used between the master oscillator and the frequency and gain control loops for isolating the master oscillator reference circuit from the loading of the loops and from the perturbation introduced by the frequency reference signal; a frequency shifting circuit in the frequency control loop permits the reference signal to be shifted to a lower or higher frequency than that of the master oscillator.
    • 负电阻发生器包括第一和第二端子; 在端子之间串联连接的第一和第二电感器; 以及半导体放大装置,其具有连接到第一端子的第一控制电极和连接到第二端子的第一有源电极和连接到电感器的结的第二有源电极。 当用于有源滤波器谐振器时,第一可变电容器与电感器互连,用于设定谐振器的谐振频率。 谐振器可以组合在有源滤波器与传输线之间,其中每个谐振器通过从输入到输出的电阻减小而互连到线路上,以平衡谐振器所经受的rf电流。 通过使用主振荡器实现改进的双环有源滤波器控制系统,该主振荡器采用与滤波器中的有源滤波器谐振器匹配的谐振器,并且对频率和Q因子控制进行伺服,以便驱动信号被补偿温度漂移, 制造公差和其他问题,而在主振荡器和频率和增益控制回路之间使用缓冲放大器,用于将主振荡器参考电路与负载环路以及由频率参考信号引入的扰动隔离; 频率控制环路中的频移电路允许参考信号被转换到比主振荡器更低或更高的频率。
    • 3. 发明授权
    • Low noise oscillator operating in the ultra-high frequency range
    • 低噪声振荡器在超高频范围内工作
    • US4567449A
    • 1986-01-28
    • US508914
    • 1983-06-29
    • Alain BertMarc Camiade
    • Alain BertMarc Camiade
    • H03B5/18H03B7/12
    • H03B5/1852H03B2200/0028H03B2200/0076H03B2200/0086H03B2200/0088H03B5/1876
    • The invention relates to an ultra-high frequency oscillator (11-14 GHz) having a plurality of transistors, stabilized on at least one of their electrodes by a microstrip line coupled to a dielectric resonator. The oscillator according to the invention groups the transistors on the periphery of an insulating substrate, which centrally supports a single dielectric resonator common to all the transistors. The microstrip lines have two end portions, which are not coupled and are parallel to the field lines of the resonator, and a coupled central portion, perpendicular to the field lines. The transistors and microstrip lines are coplanar. The output is by a coaxial cable at the center of the substrate or by a microstrip line coplanar to the substrate.
    • 本发明涉及具有多个晶体管的超高频振荡器(11-14GHz),其通过耦合到介质谐振器的微带线稳定在其电极中的至少一个上。 根据本发明的振荡器将绝缘基板的周边上的晶体管组合在一起,其中心地支撑所有晶体管共同的单个介质谐振器。 微带线具有两个端部,其不耦合并且平行于谐振器的场线,以及垂直于场线的耦合中心部分。 晶体管和微带线是共面的。 输出是通过同轴电缆在基板的中心或通过与基板共面的微带线。
    • 8. 发明授权
    • Modified Colpitts oscillator for driving an antenna coil and generating
a clock signal
    • 改进的Colpitts振荡器,用于驱动天线线圈并产生时钟信号
    • US5625327A
    • 1997-04-29
    • US502313
    • 1995-07-13
    • Gary T. CarrollJ. Donald Pauley
    • Gary T. CarrollJ. Donald Pauley
    • H03B5/12H03D1/10H03D1/18
    • H03B5/1203H03B5/1231H03B2200/0008H03B2200/0086H03D1/10H03D1/18
    • A Colpitts-type oscillator circuit suitable for use with electronic identification systems is disclosed. The oscillator circuit utilizes a pair of transistors coupled together with a feedback loop that includes a parallel LC circuit such that the output amplitude can be as high as a factor of 20 times the supply voltage or more while maintaining a high Q, low distortion output. The oscillator circuit is a modified Colpitts oscillator that includes a NPN transistor and a PNP transistor coupled together and a Colpitts type feedback loop containing a parallel LC circuit. The capacitance of the parallel LC circuit consists of at least two capacitors in series forming a capacitive divider which provides a low impedance feedback via the base of the NPN transistor into the emitter of the PNP transistor. The collector of the PNP transistor taps into the inductor of the parallel LC circuit such that the inductor is driven to resonance.
    • 公开了一种适用于电子识别系统的Colpitts型振荡器电路。 振荡器电路利用一对晶体管与包括并联LC电路的反馈回路耦合在一起,使得输出幅度可以高达电源电压的20倍或更高,同时保持高Q,低失真输出。 振荡器电路是经过修改的Colpitts振荡器,其包括耦合在一起的NPN晶体管和PNP晶体管以及包含并联LC电路的Colpitts型反馈回路。 并联LC电路的电容由串联的至少两个电容器构成,形成电容分压器,其通过NPN晶体管的基极提供低阻抗反馈到PNP晶体管的发射极。 PNP晶体管的集电极进入并联LC电路的电感器,使得电感器被驱动到谐振。