Temperature compensated FET power detector
    1.
    发明授权
    Temperature compensated FET power detector 失效
    温度补偿FET功率检测器

    公开(公告)号:US5079454A

    公开(公告)日:1992-01-07

    申请号:US564717

    申请日:1990-08-08

    IPC分类号: G01R21/14

    CPC分类号: G01R21/14

    摘要: A detector for generating an output signal representative of the power of an input signal comprises an input capacitor coupled to receive the input signal for transmitting alternating current portions of the input signal. A first common-source FET pair have gate terminals coupled to a temperature-compensating circuit for varying the gate-to-source voltage. The drain of one FET is coupled through an intermediate capacitor to ground. That drain is also coupled to a relatively positive voltage source through a series-connected inductor and resistor. The drain of the second FET is also coupled to the voltage source through a resistor. An output capacitor couples the alternating current signal, at the junction between the resistor associated with the first transistor and the inductor, to ground. A differential amplifier and comparator generates an output signal representative of the difference between the signals appearing on the transistor sides of the two resistors.

    摘要翻译: 用于产生表示输入信号的功率的输出信号的检测器包括一个输入电容器,其被耦合以接收用于传输输入信号的交流部分的输入信号。 第一共源FET对具有耦合到温度补偿电路的栅极端子,用于改变栅极至源极电压。 一个FET的漏极通过中间电容器耦合到地。 该漏极还通过串联电感和电阻耦合到相对正的电压源。 第二FET的漏极还通过电阻耦合到电压源。 输出电容器将交流电信号耦合到与第一晶体管和电感器相关联的电阻之间的接地处。 差分放大器和比较器产生表示在两个电阻器的晶体管侧出现的信号之间的差异的输出信号。

    Spiral hybrid coupler
    2.
    发明授权
    Spiral hybrid coupler 失效
    螺旋混合耦合器

    公开(公告)号:US4800345A

    公开(公告)日:1989-01-24

    申请号:US154640

    申请日:1988-02-09

    IPC分类号: H01P5/18

    CPC分类号: H01P5/186

    摘要: The disclosed coupler is in a spiral form having approximately 11/4 turns and a length of just over 1/4 wavelength of a designed frequency. The coil includes an interdigitated section with two conductor portions for each conductor. In the overlapped turn portion, the inner conductors are narrower than the outer conductor. Further, conductor pads are disposed adjacent the coupler conductors for connection to associated couplers to vary the bandwidth of the coupler.

    摘要翻译: 所公开的耦合器是螺旋形的,具有约11/4匝和刚好超过设计频率的1/4波长的长度。 线圈包括用于每个导体的两个导体部分的叉指部分。 在重叠的匝部中,内导体比外导体窄。 此外,导体焊盘设置在耦合器导体附近以连接到相关联的耦合器以改变耦合器的带宽。

    Method for tuning a microstrip device using a plastic dielectric
substance
    3.
    发明授权
    Method for tuning a microstrip device using a plastic dielectric substance 失效
    使用塑料电介质物质调谐微带器件的方法

    公开(公告)号:US5357229A

    公开(公告)日:1994-10-18

    申请号:US145976

    申请日:1993-11-01

    申请人: Robert H. Benton

    发明人: Robert H. Benton

    IPC分类号: H01P11/00 H01P1/203

    CPC分类号: H01P11/007

    摘要: A microstrip filter having a plurality of parallel resonant conductors mounted on a dielectric substrate is tuned by applying a portion of a hot-melt type glue to the filter surface. The glue is melted and then deposited on the conductors and spread across and along the conductors until the filter has a desired frequency response. The glue is then cooled until it becomes solid.

    摘要翻译: 通过将一部分热熔型胶水施加到过滤器表面来调节具有安装在电介质基底上的多个平行谐振导体的微带滤波器。 胶水熔化,然后沉积在导体上,并沿着导体扩散,直到滤光片具有所需的频率响应。 然后将胶冷却直至变成固体。

    Feedback cascode amplifier
    4.
    发明授权
    Feedback cascode amplifier 失效
    反馈共源共栅放大器

    公开(公告)号:US5015968A

    公开(公告)日:1991-05-14

    申请号:US558611

    申请日:1990-07-27

    IPC分类号: H03F1/22 H03F1/34 H03F1/56

    CPC分类号: H03F1/342 H03F1/226 H03F1/565

    摘要: A microwave-frequency feedback amplifier circuit has a cascode amplifier with a first field-effect transistor (FET) having a gate for receiving a signal to be amplified, a source coupled to a reference voltage, and a drain. A second FET has a source coupled to the drain of the first FET, a source coupled to the reference voltage, and a drain. A transformer includes a first inductor with a first terminal coupled to the drain of the second FET and a second terminal for outputting an amplified input signal. A second inductor has a first terminal coupled to the second terminal of the first inductor, and a second terminal coupled to the reference voltage. A feedback circuit couples the drain of the second FET to the gate of the first FET.

    摘要翻译: 微波频率反馈放大器电路具有共源共栅放大器,其具有第一场效应晶体管(FET),其具有用于接收要放大的信号的栅极,耦合到参考电压的源极和漏极。 第二FET具有耦合到第一FET的漏极的源极,耦合到参考电压的源极和漏极。 变压器包括具有耦合到第二FET的漏极的第一端子的第一电感器和用于输出放大的输入信号的第二端子。 第二电感器具有耦合到第一电感器的第二端子的第一端子和耦合到参考电压的第二端子。 反馈电路将第二FET的漏极耦合到第一FET的栅极。