公开(公告)号：US5321374A

公开(公告)日：1994-06-14

申请号：US915925

申请日：1992-07-17

Applicant: Tomoki Uwano

Inventor： Tomoki Uwano

IPC: H01P1/205 ,  H01P7/04 ,  H01P7/08 ,  H03B1/00 ,  H03B5/18 ,  H01P1/20

CPC classification number: H01P7/082 ,  H01P1/2053 ,  H01P7/04 ,  H01P7/084 ,  H03B5/1847 ,  H03B2200/004 ,  H03B2201/0208 ,  H03B5/1805

Abstract: Disclosed is a TEM mode resonator having as a means for adjusting the resonance frequency a simple frequency adjusting mechanism appropriate for size reduction while permitting easy mounting of a varactor diode for varying the resonance frequency thereto. Below a strip transmission line 2 is provided a slot 7 having a length L perpendicular to the transmission line as located at an outer ground conductor surface 3 of a one-fourth wavelength type microstrip line resonator having its one end short-circuited. According as increasing the slot length L, the resonance frequency of the resonator reduces, which characteristic is utilized as a means for adjusting the resonance frequency. By connecting a varactor diode at a center portion of the slot line and varying the voltage applied to the diode, the resonance frequency can be varied.

Abstract translation: 公开了一种TEM模式谐振器，其作为用于调节谐振频率的装置，适合于减小尺寸的简单的频率调节机构，同时容易地安装用于改变谐振频率的变容二极管。 在带状传输线2的下方设置有狭缝7，槽7具有垂直于传输线的长度L，位于其一端短路的四分之一波长型微带线谐振器的外部接地导体表面3处。 根据增加槽长度L，谐振器的谐振频率减小，该特性被用作调整谐振频率的手段。 通过在槽线的中心部分连接变容二极管并改变施加到二极管的电压，可以改变谐振频率。

公开(公告)号：US5218174A

公开(公告)日：1993-06-08

申请号：US771369

申请日：1991-10-01

Applicant: Donald F. Gray ,  James L. Rodgers ,  James R. Sciacero ,  Charles A. Waterbury

Inventor： Donald F. Gray ,  James L. Rodgers ,  James R. Sciacero ,  Charles A. Waterbury

IPC: G06F3/041 ,  G06F3/033 ,  G06F3/046 ,  H03B1/00 ,  H03B5/12

CPC classification number: G06F3/046 ,  H03B5/1215 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1265 ,  H03B2200/0098 ,  H03B2201/0208

Abstract: A digitizing system includes a tablet and a cordless pointing device including a plurality of data grid conductors in the tablet and a plurality of clock grid conductors in the tablet, all receiving a magnetic field signal transmitted by the pointing device. A data channel circuit includes a differential amplifier and demodulating and filtering circuitry coupled to an output of the differential amplifier, having a clock input. An A/D converter has an input coupled to an output of the demodulating and filtering circuitry. Multiplexing circuitry selectively couples various grid conductor signals to the data channel circuit. A clock recovery circuit responsive to the clock grid conductors includes a phase-locked-loop circuit that generates a recovered clock signal which is synchronous with the magnetic field signal and is used as a reference for demodulating the phase and amplitude of signals multiplexed from the data grid conductors to the data channel circuit. Accurate determination of the pointer tip position is achieved simultaneously with accurate decoding of pointer commands represented by shifts in the frequency of the magnetic field signal.

Abstract translation: 数字化系统包括平板电脑和无线指示设备，其包括平板电脑中的多个数据网格导体和平板电脑中的多个时钟网格导体，全部接收由指示设备发送的磁场信号。 数据通道电路包括差分放大器和耦合到差分放大器的输出的解调和滤波电路，具有时钟输入。 A / D转换器具有耦合到解调和滤波电路的输出的输入。 多路复用电路将各种电网导体信号选择性地耦合到数据通道电路。 响应于时钟网格导体的时钟恢复电路包括产生与磁场信号同步的恢复时钟信号的锁相环电路，并且用作解调从数据复用的信号的相位和幅度的参考 电网导体到数据通道电路。 与由磁场信号的频率偏移表示的指针指令的精确解码同时实现指针尖端位置的精确确定。

公开(公告)号：US5185583A

公开(公告)日：1993-02-09

申请号：US719448

申请日：1991-06-24

Applicant: Leng H. Ooi ,  Stephen B. Einbinder

Inventor： Leng H. Ooi ,  Stephen B. Einbinder

IPC: H03B1/00 ,  H03B5/04 ,  H03B5/18 ,  H03L7/099

CPC classification number: H03B5/1847 ,  H03L7/099 ,  H03B2200/004 ,  H03B2200/0062 ,  H03B2201/0208 ,  H03B5/04

Abstract: An actively biased oscillator (200) includes a set of current sensing components (214,216) for sensing the amount of current flowing into the first terminal of the amplifier; and a differential amplifier (212) responsive to the current sensing components for automatically adjusting the amount of current flowing into the second terminal of the amplifier.

Abstract translation: 主动偏置振荡器（200）包括用于感测流入放大器的第一端子的电流量的一组电流检测部件（214,216） 以及响应于电流感测部件的差分放大器（212），用于自动调节流入放大器的第二端子的电流量。

公开(公告)号：US5153533A

公开(公告)日：1992-10-06

申请号：US713794

申请日：1991-06-12

Applicant: Kevin Lamacraft ,  Kenneth Elder ,  Christopher D. Howson

Inventor： Kevin Lamacraft ,  Kenneth Elder ,  Christopher D. Howson

IPC: H03B5/18 ,  H03B1/00 ,  H03B9/14

CPC classification number: H03B9/141 ,  H03B2201/0208

Abstract: A voltage-controlled oscillator using planar microstrip technology and primarily for the 37 to 39.5 GHz frequency band comprises a strip-line resonator, a negative resistance device mounted adjacent the center of the resonator, respective variable capacitance devices mounted adjacent the ends of the resonator, a high impedance coupling the resonator to an output path, and bias signals are applied to the negative resistance device and said variable capacitance devices.

公开(公告)号：US5126697A

公开(公告)日：1992-06-30

申请号：US616400

申请日：1990-11-21

Applicant: Hendrikus C. Nauta ,  Ernst H. Nordholt

Inventor： Hendrikus C. Nauta ,  Ernst H. Nordholt

IPC: H03L7/06 ,  H03B1/00 ,  H03B5/12 ,  H03B5/32 ,  H03B5/36

CPC classification number: H03B5/368 ,  H03B5/1209 ,  H03B5/1231 ,  H03B5/1271 ,  H03B2200/0036 ,  H03B2200/004 ,  H03B2201/0208

Abstract: Voltage controlled oscillator provided with a resonant network, an amplifier and a reactive network, all incorporated in an oscillator loop, the reactive network having one or more reactive components whose values depend on a control signal fed to a control input, so that the oscillator frequency can be regulated with said control signal. A control loop is provided between the resonant network and the reactive network, with which control loop the difference is determined between a measure of the imaginary part of the impedance or admittance of the resonant network and the control signal acting as reference quantity. The imaginary part of the impedance or admittance of the reactive network is regulated with said difference. The control loop contains a derivation circuit for deriving said measure and a differential amplifier, to one input of which the output signal of the derivation circuit is fed and to the other input of which the control signal is fed.

公开(公告)号：US5097228A

公开(公告)日：1992-03-17

申请号：US662666

申请日：1991-02-28

Applicant: Barton L. McJunkin

Inventor： Barton L. McJunkin

IPC: H03J3/04 ,  H03B1/00 ,  H03B5/12 ,  H03L1/02 ,  H03L5/00

CPC classification number: H03L1/023 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/129 ,  H03B2200/004 ,  H03B2200/0062 ,  H03B2201/0208

Abstract: An RF oscillator is disclosed that can be tuned to operate over a wide range of frequencies while maintaining advantageous bias conditions. The oscillator includes circuitry that adjusts an oscillator bias signal in response to changes in oscillator frequency and/or ambient temperature, and does so without resort to using the same signal for both bias and frequency control. By so doing to control parameters such as phase noise, output power and compression angle, both the frequency range and temperature range of an oscillator can be extended, while simultaneously improving the oscillator's performance.

公开(公告)号：US5039956A

公开(公告)日：1991-08-13

申请号：US394290

申请日：1989-08-15

Applicant: Gerald L. Somer

Inventor： Gerald L. Somer

IPC: H03B1/00 ,  H03B5/12 ,  H03J1/00

CPC classification number: H03J1/005 ,  H03B5/1221 ,  H03B5/1231 ,  H03B5/1243 ,  H03B2200/0006 ,  H03B2200/0008 ,  H03B2200/0012 ,  H03B2200/004 ,  H03B2200/0072 ,  H03B2200/0086 ,  H03B2201/0208

Abstract: A diode tuned resonant circuit (42) with an inductor (L1) a first variable reactance diode (VAR1) connected in parallel with the inductor (L1), and a second variable reactance diode (VAR2) connected in series with the parallel combination of the inductor (L1) and first diode (VAR1) is used in an oscillator circuit. The resonant frequency of the circuit may be adjusted over a relatively broad frequency range while maintaining a relatively constant Q-factor by applying a biasing voltage to the first and second diodes (VAR1, VAR2).

Abstract translation: 具有与电感器（L1）并联连接的第一可变电抗二极管（VAR1）的电感器（L1）的二极管调谐谐振电路（42）和与电感器（L1）并联连接的第二可变电抗二极管（VAR2） 电感（L1）和第一二极管（VAR1）用于振荡器电路。 可以在较宽的频率范围内调整电路的谐振频率，同时通过向第一和第二二极管（VAR1，VAR2）施加偏置电压来维持相对恒定的Q因子。

公开(公告)号：US5030926A

公开(公告)日：1991-07-09

申请号：US550776

申请日：1990-07-10

Applicant: Robert W. Walden

Inventor： Robert W. Walden

IPC: H03B5/32 ,  H03B1/00 ,  H03B5/36

CPC classification number: H03B5/368 ,  H03B2200/0012 ,  H03B2200/004 ,  H03B2200/0092 ,  H03B2201/0208 ,  Y10S331/03

Abstract: A voltage controlled crystal oscillator circuit, such as a Pierce oscillator circuit, includes an amplifier and is balanced by the addition of another varactor connected directly to the amplifier, whereby the frequency pull range is increased. Further, greater linearity can be achieved by adding another pair of varactors to the circuit.

公开(公告)号：US5019791A

公开(公告)日：1991-05-28

申请号：US563246

申请日：1990-08-06

Applicant: Leonard D. Cohen

Inventor： Leonard D. Cohen

IPC: H03B1/00 ,  H03B9/14

CPC classification number: H03B9/14 ,  H03B2200/0088 ,  H03B2200/0092 ,  H03B2201/02 ,  H03B2201/0208 ,  H03B9/141

Abstract: Flicker (1/f) noise is suppressed in an oscillator by reducing oscillator voltage-frequency pushing to zero. A varactor (56) is incorporated in the resonator circuit and is biased with a tuning voltage setting the varactor to a capacitance value providing the zero oscillator pushing at a given frequency. A common bias connection (62) is provided between the varactor and the active element (64) such that a random perturbation voltage change across the active element also causes a change in voltage across the varactor, to compensate a change in oscillator frequency otherwise caused thereby. The varactor capacitance versus voltage characteristic is shaped such that a change in active element voltage provides a change in varactor voltage, and the combination of these voltage changes results in a zero change in oscillator frequency. The tuning slope of the oscillator provided by the varactor is opposite the tuning slope of the oscillator resulting from a change in active element voltage.

Abstract translation: 通过将振荡器电压频率降至零，可以抑制振荡器中的闪烁（1 / f）噪声。 变容二极管（56）被并入谐振器电路中，并且将设定变容二极管的调谐电压偏置为提供以给定频率推压的零振荡器的电容值。 在变容二极管和有源元件（64）之间提供公共偏置连接（62），使得有源元件上的随机扰动电压变化也导致变容二极管两端的电压变化，以补偿由此引起的振荡器频率的变化 。 可变容量电容对电压特性的形状使得有源元件电压的变化提供变容二极管电压的变化，并且这些电压变化的组合导致振荡器频率的零变化。 由变容二极管提供的振荡器的调谐斜率与由有源元件电压变化引起的振荡器的调谐斜率相反。

公开(公告)号：US4999587A

公开(公告)日：1991-03-12

申请号：US460411

申请日：1990-01-03

Applicant: David H. Evans

Inventor： David H. Evans

IPC: H03B9/10 ,  H03B1/00 ,  H03B9/14

CPC classification number: H03B9/141 ,  H03B2009/126 ,  H03B2201/0208 ,  H03B9/146 ,  H03B9/147

Abstract: In a waveguide oscillator, a Gunn diode or other negative-resistance oscillator device (2) has a resonant cap (3) for coupling to the waveguide (1), and a tuning varactor diode (11) is coupled by a probe (13) to the electromagnetic filed in the vicinity of the cap (3). In accordance with the invention, a mechanically simple, compact and cheap oscillator arrangement is obtained by integrating both the varactor diode (11) and the probe (13) in a circuit body (10) mounted in the waveguide (1), preferably in an area below the plane of the cap (3) so as to reduce perturbation of the filed. The probe is formed as a conductive track (13) on the circuit body (10), for example as a transmission line coupling to the electric field and preferably located at the front surface (18) of the body (10) or as a current loop extending on a side wall of the body (10) and coupling to the magnetic field.