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    Low phase noise variable frequency oscillator
    1.
    发明申请
    Low phase noise variable frequency oscillator 审中-公开
    低相位噪声可变频率振荡器

    公开(公告)号：US20020000888A1

    公开(公告)日：2002-01-03

    申请号：US09907362

    申请日：2001-07-17

    Inventor： Mikhail Mordkovich

    IPC: H03B005/12 ,  H03B005/18 ,  H03J007/08

    CPC classification number: H03B5/1847 ,  H03B2201/0208 ,  H03B2201/036

    Abstract: A variable frequency oscillator which exhibits low phase noise by increasing the quality factor of the resonator in the oscillator circuit. This is achieved by employing multiple means of decoupling the resonator from all elements and circuits to which the resonator is connected. For example, the resonator is decoupled from the whole oscillator circuitry by connecting the oscillator to a tap on the resonator which reflects the oscillator as a lighter load across the entire resonator. The resonator is further decoupled from the emitter to the base junction circuitry by placing a impedance network between the base of the transistor and the ground. Additional decoupling circuitry is employed to reduce the loading of the resonator due to the external oscillator load.

    Abstract translation: 一种可变频率振荡器，通过增加振荡器电路中的谐振器的品质因子来展现低相位噪声。 这通过采用将谐振器与谐振器连接到的所有元件和电路去耦合的多种方式来实现。 例如，通过将振荡器连接到谐振器上的抽头，将振荡器与整个振荡器电路解耦，反射振荡器作为整个谐振器上的较轻负载。 通过在晶体管的基极和地之间放置阻抗网络，谐振器进一步从发射极去耦合到基极结电路。 采用额外的去耦电路来减少由于外部振荡器负载引起的谐振器的负载。

    CMOS negative resistance/Q enhancement method and apparatus
    4.
    发明申请
    CMOS negative resistance/Q enhancement method and apparatus 审中-公开
    CMOS负电阻/ Q增强方法和装置

    公开(公告)号：US20060017515A1

    公开(公告)日：2006-01-26

    申请号：US10896758

    申请日：2004-07-22

    Applicant: Nebojsa Stanic ,  Yannis Tsividis

    Inventor： Nebojsa Stanic ,  Yannis Tsividis

    IPC: H03B5/12

    CPC classification number: H03B5/1228 ,  H03B5/1212 ,  H03B5/124 ,  H03B2201/036

    Abstract: An apparatus for optimizing a quality factor Q associated with an electrical resonator system includes an LC resonator and an optimizing circuit for providing a negative resistance. The optimizing circuit is electrically coupled to the resonator circuit, and includes two CMOS transistor pairs with the gates of the PMOS transistors cross-coupled with inputs to the resonator through capacitors, and the gates of the NMOS transistor cross-coupled with the inputs to the resonator through capacitors. The optimizing circuit receives at least one control voltage for varying the negative resistance by selectively biasing the PMOS transistors and NMOS transistors. The optimizing circuit also includes a current source for providing a controlled current to the CMOS transistor pairs. The current source is situated either between a supply voltage and the CMOS transistor pairs, or between the CMOS transistor pairs and a ground reference voltage. A current-control voltage controls the current flowing through the CMOS transistor pairs.

    Abstract translation: 用于优化与电谐振器系统相关联的质量因数Q的装置包括LC谐振器和用于提供负电阻的优化电路。 优化电路电耦合到谐振器电路，并且包括两个CMOS晶体管对，其中PMOS晶体管对的栅极通过电容器与谐振器的输入交叉耦合，并且NMOS晶体管的栅极与输入交叉耦合到 谐振器通过电容器。 优化电路通过选择性地偏置PMOS晶体管和NMOS晶体管来接收用于改变负电阻的至少一个控制电压。 优化电路还包括用于向CMOS晶体管对提供受控电流的电流源。 电流源位于电源电压和CMOS晶体管对之间，或位于CMOS晶体管对与接地参考电压之间。 电流控制电压控制流过CMOS晶体管对的电流。

    Active filter resonator and system and negative resistance generator usable therein
    5.
    发明授权
    Active filter resonator and system and negative resistance generator usable therein 失效
    有源滤波器谐振器和系统及负电阻发生器可用于其中

    公开(公告)号：US5451915A

    公开(公告)日：1995-09-19

    申请号：US69298

    申请日：1993-05-26

    Applicant: Peter J. Katzin ,  Yalcin Ayasli ,  Brian E. Bedard

    Inventor： Peter J. Katzin ,  Yalcin Ayasli ,  Brian E. Bedard

    IPC: H03B1/00 ,  H03B5/12 ,  H03B7/06 ,  H03H5/12 ,  H03H11/52 ,  H03J3/04 ,  H03H11/04

    CPC classification number: H03L7/0805 ,  H03B5/1203 ,  H03B5/1228 ,  H03B5/1243 ,  H03H11/52 ,  H03H5/12 ,  H03J3/04 ,  H03B2200/004 ,  H03B2200/0086 ,  H03B2201/0208 ,  H03B2201/036 ,  H03B7/06

    Abstract: 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.

    Abstract translation: 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。

    Variable negative resistance cell for bipolar integrated circuits
    6.
    发明授权
    Variable negative resistance cell for bipolar integrated circuits 失效
    双极集成电路的可变负电阻电池

    公开(公告)号：US06621331B2

    公开(公告)日：2003-09-16

    申请号：US09925828

    申请日：2001-08-07

    Applicant: Carl W. Pobanz ,  Gopal Raghavan

    Inventor： Carl W. Pobanz ,  Gopal Raghavan

    IPC: H03K300

    CPC classification number: H03B27/00 ,  H03B5/1212 ,  H03B5/1231 ,  H03B5/1287 ,  H03B2201/036

    Abstract: An effective means and apparatus for generating a negative resistance including a circuit element that exhibits an increase in current as the applied voltage is decreased. Other embodiments of the present invention provide electronic means for improving the quality Q factor of on-chip resonators, which enables the creation of high-performance bipolar RF circuits with a minimum of external components.

    Abstract translation: 一种用于产生负电阻的有效装置和装置，包括随施加电压而呈现电流增加的电路元件。 本发明的其他实施例提供用于改善片上谐振器的质量Q因子的电子装置，其使得能够利用最少的外部部件创建高性能双极性RF电路。

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