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    • 7. 发明公开
    • 고주파 리미터 회로
    • 无线电频率限制电路
    • KR1020050123157A
    • 2005-12-29
    • KR1020057019457
    • 2004-04-09
    • 레이티언 캄파니
    • 아들러슈타인,마이클,지.트렘블레이,존,씨.
    • H03F3/60H03F1/52H01P1/22
    • H03G11/04H03F1/523H03F3/601H03F2200/211H03F2200/258
    • A limiter circuit (10) includes a rectification circuit (14) coupled to an input of the limiter circuit to produce a voltage having a predetermined average level. The level is a function of an input signal (RFIN) fed to the input (16) of the limiter circuit (10). A voltage divider circuit (20) is coupled to the rectification circuit (14) for producing an output voltage having a level proportional to the input signal (RAN). An enhancement mode field effect transistor (Z1) has a gate electrode fed by the output voltage produced by the voltage divider circuit (20). The transistor has drain and source electrodes coupled to an output of the limiter circuit and a reference potential, respectively. A transmission line (22) is coupled between the input (16) of the limiter (10) and the output (18) of the limiter circuit (10). The transmission line (22) has an electrical length nl/4, where l is the nominal operating wavelength of the limiter circuit and n is an odd integer.
    • 限幅器电路(10)包括耦合到限幅器电路的输入的整流电路(14),以产生具有预定平均电平的电压。 电平是馈送到限幅器电路(10)的输入(16)的输入信号(RFIN)的函数。 分压器电路(20)耦合到整流电路(14),用于产生具有与输入信号(RAN)成比例的电平的输出电压。 增强型场效应晶体管(Z1)具有由分压电路(20)产生的输出电压供给的栅电极。 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(22)耦合在限幅器(10)的输入端(16)和限幅器电路(10)的输出端(18)之间。 传输线(22)具有电长度nl / 4,其中l是限幅器电路的额定工作波长,n是奇整数。