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132 条记录 (耗时 0.02 秒)

    Radio frequency limiter circuit
    21.
    发明授权
    Radio frequency limiter circuit 有权
    射频限制电路

    公开(公告)号：US06747484B1

    公开(公告)日：2004-06-08

    申请号：US10420454

    申请日：2003-04-22

    申请人： Michael G. Adlerstein ,  John C. Tremblay

    发明人： Michael G. Adlerstein ,  John C. Tremblay

    IPC分类号： H01P122

    CPC分类号： H03G11/04 ,  H03F1/523 ,  H03F3/601 ,  H03F2200/211 ,  H03F2200/258

    摘要： A limiter circuit includes a rectification circuit coupled to an input of the limiter circuit. The rectification circuit produces a voltage having a predetermined average level. The level is a function of an input signal fed to the input of the limiter circuit. A voltage divider circuit is coupled to the rectification circuit for producing an output voltage having a level proportional to the input signal. An enhancement mode field effect transistor has a gate electrode fed by the output voltage produced by the voltage divider circuit. The transistor has drain and source electrodes coupled to an output of the limiter circuit and a reference potential, respectively. A transmission line is coupled between the input of the limiter and the output of the limiter circuit. The transmission line has an electrical length n&lgr;/4, where &lgr; is the nominal operating wavelength of the limiter circuit and n is an odd integer. The use of an enhancement mode transistor with a positive gate threshold for conduction, greatly simplifies the limiter circuit compared with conventional designs using depletion mode transistors.

    摘要翻译： 限幅器电路包括耦合到限幅器电路的输入端的整流电路。 整流电路产生预定平均电平的电压。 该电平是馈送到限幅器电路的输入端的输入信号的函数。 分压器电路耦合到整流电路，用于产生具有与输入信号成比例的电平的输出电压。 增强型场效应晶体管具有由分压器电路产生的输出电压馈送的栅电极。 晶体管的漏极和源极分别耦合到限幅器电路的输出端和参考电位。 传输线耦合在限幅器的输入端和限幅器电路的输出之间。 传输线具有电长度nλ/ 4，其中λ是限幅器电路的标称工作波长，n是奇整数。 与使用耗尽型晶体管的常规设计相比，使用具有正栅极阈值用于导通的增强型晶体管大大简化了限幅器电路。

    Power delivery system and method of controlling the power delivery system for use in a radio frequency system
    23.
    发明授权
    Power delivery system and method of controlling the power delivery system for use in a radio frequency system 失效
    电力输送系统和控制供电系统在无线电频率系统中使用的方法

    公开(公告)号：US5867060A

    公开(公告)日：1999-02-02

    申请号：US799967

    申请日：1997-02-14

    申请人： Grover Charles Burkett, Jr. ,  Bradley Warren Holdridge ,  Michael David Leffel

    发明人： Grover Charles Burkett, Jr. ,  Bradley Warren Holdridge ,  Michael David Leffel

    IPC分类号： H03F3/68 ,  H03F1/02 ,  H03F1/52 ,  H03F3/21 ,  H03F3/60 ,  H03G3/02

    CPC分类号： H03F3/602 ,  H03F1/52 ,  H03F3/211 ,  H03F2200/211 ,  H03F2200/255 ,  H03F2203/21106 ,  H03F2203/21109 ,  H03F2203/21142

    摘要： A power delivery system (500) including a power splitter (502), a plurality of power amplifier modules (508) responsive to the power splitter (502), a power combiner (504), and a gateway controller (506) is provided. Each of the plurality of power amplifier modules (508) include an input switch (520), a variable attenuator (524), an RF power amplifier (526) responsive to the variable attenuator (524) and the input switch (520), an output switch (530) responsive to the RF power amplifier (526), and an alarm detector (532) for indicating an alarm condition of the RF power amplifier (526). The power combiner (504) is responsive to the plurality of power amplifier modules (508), and the gateway controller (506) is in communication with each of the plurality of power amplifier modules (508). The plurality of power amplifier modules controlled in accordance to whether a sleep criteria has been met. When a said sleep criteria has been met at least one of the plurality of power amplifier modules is placed into sleep mode, and is then returned to active mode if the sleep criteria is exited.

    摘要翻译： 包括功率分配器（502），响应于功率分配器（502）的多个功率放大器模块（508），功率组合器（504）和网关控制器（506）的功率传递系统（500）。 多个功率放大器模块（508）中的每一个包括响应于可变衰减器（524）和输入开关（520）的输入开关（520），可变衰减器（524），RF功率放大器（526）， 响应于所述RF功率放大器（526）的输出开关（530）和用于指示所述RF功率放大器（526）的报警状态的报警检测器（532）。 功率组合器（504）响应于多个功率放大器模块（508），并且网关控制器（506）与多个功率放大器模块（508）中的每一个通信。 根据是否满足睡眠标准来控制多个功率放大器模块。 当已经满足所述睡眠标准时，多个功率放大器模块中的至少一个被置于睡眠模式，并且如果退出睡眠标准，则返回到活动模式。