公开(公告)号：US2516889A

公开(公告)日：1950-08-01

申请号：US65373046

申请日：1946-03-12

Applicant: STANDARD TELEPHONES CABLES LTD

Inventor： LIBBY LESTER L

IPC: F23Q7/00 ,  H03B5/34 ,  H03D7/02 ,  H03D7/10

CPC classification number: H03B5/34 ,  F23Q7/00 ,  H03D7/02 ,  H03D7/10

公开(公告)号：US2273640A

公开(公告)日：1942-02-17

申请号：US34050040

申请日：1940-06-14

Applicant: RCA CORP

Inventor： JOHAN HAANTJES ,  TELLEGEN BERNARDUS D H

IPC: H03D7/02 ,  H03D7/18

CPC classification number: H03D7/18 ,  H03D7/02

公开(公告)号：US2239560A

公开(公告)日：1941-04-22

申请号：US32059240

申请日：1940-02-24

Applicant: RCA CORP

Inventor： HEROLD EDWARD W

IPC: H03D7/02

CPC classification number: H03D7/02

公开(公告)号：US09780728B1

公开(公告)日：2017-10-03

申请号：US15083939

申请日：2016-03-29

Applicant: Peregrine Semiconductor Corporation

Inventor： Daoud Salameh

IPC: H03D7/02 ,  H03D7/14 ,  H03H7/42 ,  H01L23/66 ,  H01L27/06 ,  H01L27/12 ,  H01L27/092 ,  H01L29/78 ,  H01L29/786 ,  H01L21/84 ,  H01L21/86 ,  H01L21/8238

CPC classification number: H03D7/1458 ,  H01L21/8238 ,  H01L21/84 ,  H01L21/86 ,  H01L23/66 ,  H01L27/0629 ,  H01L27/092 ,  H01L27/1203 ,  H01L29/7838 ,  H01L29/786 ,  H03D7/02 ,  H03D7/1408 ,  H03D7/1441

Abstract: A FET based double balanced mixer (DBM) that exhibits good conversion gain and IIP3 values and provides improved linearity and wide bandwidth. In one embodiment, a first balun is configured to receive a local oscillator (LO) signal and generate two balanced LO signals that are coupled to two corresponding opposing nodes of a four-node FET ring. A second balun is configured to pass an RF signal on the unbalanced side. The FET ring includes at least four FETs connected as branches of a ring, with the source of each FET connected to the drain of a next FET in the ring. Each FET is preferably fabricated as, or configured as, a low threshold voltage device having its gate connected to its drain, which causes the FET to operate as a diode, but with the unique characteristic of having close to a zero turn-on voltage.

公开(公告)号：US20160173050A9

公开(公告)日：2016-06-16

申请号：US14214437

申请日：2014-03-14

Applicant: DockOn AG

Inventor： Forrest Brown ,  Patrick Rada ,  Alexandre Dupuy

IPC: H03G11/04 ,  H03D1/08

CPC classification number: H01P5/19 ,  H01Q7/00 ,  H01Q21/0075 ,  H03D1/08 ,  H03D1/18 ,  H03D7/02 ,  H03D7/12 ,  H03D7/165 ,  H03D7/166 ,  H03D11/04 ,  H03D11/08 ,  H03D2200/0043 ,  H03D2200/0098 ,  H03F1/08 ,  H03F3/04 ,  H03F3/191 ,  H03F2200/165 ,  H03F2200/294 ,  H03G11/04

Abstract: A logarithmic amplifier (LDA) is described that includes an amplifier configured to oscillate a modulated input signal, a feedback establishing a 180 degree phase shift between the amplifier input and the output and maintaining oscillation of the input signal, a parallel resonant circuit connected to the amplifier output causing the amplifier to resonate at or around a center frequency, and a controller connected to the amplifier input cyclically terminating oscillation of the input signal each time a pre-determined threshold of current is detected, the controller including a low pass filter configured to generate a second output signal having a repetition frequency. The LDA may be used for AM with or without a PLL and/or a superhetrodyne. The LDA may be implemented as a mixer and used for phase demodulation. The LDA may be used for phase demodulation. The LDA may be used in place of a low noise amplifier.

Abstract translation: 描述了对数放大器（LDA），其包括被配置为振荡调制输入信号的放大器，在放大器输入和输出之间建立180度相移并保持输入信号的振荡的反馈，并联谐振电路 放大器输出使得放大器在中心频率处或周围谐振，以及连接到放大器输入端的控制器，每当检测到电流的预定阈值时循环地终止输入信号的振荡，则控制器包括低通滤波器， 产生具有重复频率的第二输出信号。 LDA可用于具有或不具有PLL和/或超临界的AM。 LDA可以实现为混频器并用于相位解调。 LDA可用于相位解调。 可以使用LDA代替低噪声放大器。

公开(公告)号：US08559905B2

公开(公告)日：2013-10-15

申请号：US11950831

申请日：2007-12-05

Applicant: Kenneth V. Buer ,  Gaurav Menon ,  Ramanamurthy V. Darapu ,  Dean Muellenberg

Inventor： Kenneth V. Buer ,  Gaurav Menon ,  Ramanamurthy V. Darapu ,  Dean Muellenberg

IPC: H04B1/10 ,  H04K3/00

CPC classification number: H03D7/02

Abstract: Systems, devices and methods are disclosed for suppressing the 2LO frequency spur, output from a mixer. In various exemplary embodiments, a DC bias circuit is electrically connected to provide DC bias to one or more non-linear elements of the mixer. The biasing voltage is used to cause the current-voltage characteristics and/or junction capacitances between non-linear elements to be more symmetric and/or to suppress 2LO leakage currents that form 2LO frequency spurs at the output of the mixer. The non-linear elements may comprise one of: BJT's, diodes, and FET's. The mixer may be one of: a subharmonic mixer; a fundamental resistive mixer; a fundamental subharmonic transconductance mixer; and a fundamental transconductance mixer comprising an anti-parallel diode pair. The system may further be configured to automatically determine an appropriate DC bias voltage level that will improve one of the LO-IF isolation and the LO-RF isolation.

Abstract translation: 公开了用于抑制从混频器输出的2LO频率支线的系统，装置和方法。 在各种示例性实施例中，DC偏置电路电连接以向混频器的一个或多个非线性元件提供DC偏置。 偏置电压用于使非线性元件之间的电流 - 电压特性和/或结电容更为对称和/或抑制在混频器输出端形成2LO频率杂散的2LO漏电流。 非线性元件可以包括以下之一：BJT，二极管和FET。 混合器可以是以下之一：次谐波混合器; 基本电阻混频器; 一种基本的次谐波跨导混频器; 以及包括反并联二极管对的基本跨导混频器。 该系统还可以被配置为自动确定将改善LO-IF隔离和LO-RF隔离之一的适当DC偏置电压电平。

公开(公告)号：US08548415B2

公开(公告)日：2013-10-01

申请号：US11889350

申请日：2007-08-10

Applicant: Aaron A. Pesetski ,  Hong Zhang ,  John Xavier Przybysz ,  John Douglas Adam

Inventor： Aaron A. Pesetski ,  Hong Zhang ,  John Xavier Przybysz ,  John Douglas Adam

IPC: H04B1/26 ,  H04B1/28

CPC classification number: H04B1/28 ,  G01N21/3581 ,  H03D7/02

Abstract: An imaging system includes an RF source, a focal plane array and device for focusing the RF signal from the RF source. The focal plane array includes a plurality of carbon nanotube mixers for capturing RF signals and down-converting the signals to a selected bandwidth and output an output signal. The device focuses the RF signal output from said RF source onto the focal plane array.

Abstract translation: 成像系统包括RF源，焦平面阵列和用于聚焦来自RF源的RF信号的装置。 焦平面阵列包括用于捕获RF信号的多个碳纳米管混合器，并将信号下变频到所选择的带宽并输出输出信号。 该设备将来自所述RF源的RF信号输出聚焦到焦平面阵列上。

公开(公告)号：US20120280742A1

公开(公告)日：2012-11-08

申请号：US13462679

申请日：2012-05-02

Applicant: Goutam Chattopadhyay ,  Erich T. Schlecht ,  Choonsup Lee ,  Robert H. Lin ,  John J. Gill ,  Seth Sin ,  Imran Mehdi

Inventor： Goutam Chattopadhyay ,  Erich T. Schlecht ,  Choonsup Lee ,  Robert H. Lin ,  John J. Gill ,  Seth Sin ,  Imran Mehdi

IPC: G06G7/12 ,  H01L21/329

CPC classification number: H03D7/02 ,  H01L29/20 ,  H01L29/66212 ,  H01L29/872 ,  H03D9/0633

Abstract: A coplanar waveguide (CPW) based subharmonic mixer working at 670 GHz using GaAs Schottky diodes. One example of the mixer has a LO input, an RF input and an IF output. Another possible mixer has a LO input, and IF input and an RF output. Each input or output is connected to a coplanar waveguide with a matching network. A pair of antiparallel diodes provides a signal at twice the LO frequency, which is then mixed with a second signal to provide signals having sum and difference frequencies. The output signal of interest is received after passing through a bandpass filter tuned to the frequency range of interest.

Abstract translation: 基于共面波导（CPW）的次谐波混频器使用GaAs肖特基二极管在670 GHz工作。 混频器的一个例子有LO输入，RF输入和IF输出。 另一个可能的混频器具有LO输入，IF输入和RF输出。 每个输入或输出连接到具有匹配网络的共面波导。 一对反并联二极管提供两倍于LO频率的信号，然后与第二信号混合以提供具有和和差频率的信号。 感兴趣的输出信号在通过调谐到感兴趣的频率范围的带通滤波器之后被接收。

公开(公告)号：US20100117711A1

公开(公告)日：2010-05-13

申请号：US12527877

申请日：2007-11-15

Applicant: Takuya Suzuki ,  Kenji Kawakami ,  Ko Kanaya ,  Yoichi Kitamura

Inventor： Takuya Suzuki ,  Kenji Kawakami ,  Ko Kanaya ,  Yoichi Kitamura

IPC: G06F7/44 ,  H01L23/48

CPC classification number: H03D7/02 ,  H01L23/66 ,  H01L2223/6644 ,  H01L2924/0002 ,  H01L2924/3011 ,  H03D9/0633 ,  H01L2924/00

Abstract: A two-terminal semiconductor device is formed on a semiconductor substrate. Two wiring patterns are respectively connected to terminals of the semiconductor device, and two electrode pads are respectively connected to the wiring patterns for connecting a signal input/output circuit formed on a separate substrate. Two parallel wiring patterns are respectively connected to the wiring patterns, and two reactance-circuit connection electrode pads are respectively connected to the parallel wiring patterns for electrically connecting a reactance circuit formed on the separate substrate separately from the signal input/output circuit.

Abstract translation: 在半导体衬底上形成二端子半导体器件。 两个布线图案分别连接到半导体器件的端子，并且两个电极焊盘分别连接到用于连接形成在单独基板上的信号输入/输出电路的布线图案。 两个平行布线图案分别连接到布线图案，并且两个电抗电路连接电极焊盘分别连接到并行布线图案，用于将形成在单独基板上的电抗电路与信号输入/输出电路分开地电连接。

公开(公告)号：US07710219B2

公开(公告)日：2010-05-04

申请号：US12039536

申请日：2008-02-28

Applicant: Edward B. Stoneham

Inventor： Edward B. Stoneham

IPC: H01P5/12 ,  H03H7/46

CPC classification number: H01P1/213 ,  H01P1/2135 ,  H03D7/02

Abstract: A multiplexer circuit may include a first-frequency-quarter-wavelength transmission line extending between a junction between a common terminal and a second-frequency terminal, and a first-frequency low-impedance circuit electrically directly connecting the first transmission line to a circuit ground. In some examples, a second-frequency-quarter-wavelength transmission line may extend between the first transmission line and a third-frequency terminal. A second-frequency low-impedance circuit may electrically directly connect the second transmission line to the circuit ground. The first and second transmission lines and the first and second low-impedance circuits may provide a third-frequency transmission line. A further second-frequency low-impedance circuit may electrically couple the second terminal to the first transmission line. A third-frequency low-impedance circuit may electrically couple the second terminal to the circuit ground. The first-frequency, further second-frequency, and third-frequency low-impedance circuits and the first transmission line may provide in combination a second-frequency transmission line.

Abstract translation: 多路复用器电路可以包括在公共端子和第二频率端子之间的连接点之间延伸的第一频率四分之一波长的传输线，以及将第一传输线电连接到电路接地的第一频率低阻抗电路 。 在一些示例中，第二频率四分之一波长的传输线可以在第一传输线和第三频率终端之间延伸。 第二频率低阻抗电路可以将第二传输线电连接到电路接地。 第一和第二传输线以及第一和第二低阻抗电路可以提供第三频率传输线。 另一个第二频率低阻抗电路可以将第二端子电耦合到第一传输线。 第三频率低阻抗电路可以将第二端子电耦合到电路接地。 第一频率，第二频率和第三频率低阻抗电路和第一传输线可以组合提供第二频率传输线。