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    • 5. 发明授权
    • MMIC FET mixer and method
    • MMIC FET混频器及方法
    • US5517688A
    • 1996-05-14
    • US262719
    • 1994-06-20
    • Lyle A. FajenMichael Dydyk
    • Lyle A. FajenMichael Dydyk
    • H03D7/12H04B1/28
    • H03D7/125
    • A MMIC FET mixer and method includes a RF input port for receiving a RF signal, a feedback control input for receiving a feedback signal, and a LO input port for receiving a LO signal. A feedback controller is coupled to the RF amplifier, the feedback controller for producing a controlled RF signal in response to the feedback signal. A constant current source is coupled to the feedback controller, to the RF amplifier and to the LO input port. The constant current source receives a DC offset voltage, the controlled RF signal, and the LO signal and produces an IF output signal at an IF output port. The IF output signal is proportional to the DC offset voltage, to the RF signal, and to the LO signal.
    • MMIC FET混频器和方法包括用于接收RF信号的RF输入端口,用于接收反馈信号的反馈控制输入端和用于接收LO信号的LO输入端口。 反馈控制器耦合到RF放大器,反馈控制器用于响应于反馈信号产生受控的RF信号。 恒定电流源耦合到反馈控制器,RF放大器和LO输入端口。 恒流源接收DC偏移电压,受控RF信号和LO信号,并在IF输出端口产生IF输出信号。 IF输出信号与直流偏移电压,RF信号和LO信号成比例。
    • 6. 发明授权
    • Transmission line filter for MIC and MMIC applications
    • 用于MIC和MMIC应用的传输线滤波器
    • US5485131A
    • 1996-01-16
    • US322663
    • 1994-10-13
    • Lyle A. FajenMichael Dydyk
    • Lyle A. FajenMichael Dydyk
    • H01P1/203H03H7/00H01P1/20
    • H01P1/20336H01P1/20381
    • A transmission line filter includes first and second substantially parallel transmission lines (20, 30), with alternate ends grounded and each transmission line (20, 30) coupled through a separate capacitor (50, 60) to electrical ground. A coupling capacitor (70) connects the first and second transmission lines (20, 30). A RF output (40) coupled to the second transmission line (30) outputs a filtered RF signal in response to a RF signal input to a RF input (10) on the first transmission line (20). MIC and MMIC applications using series capacitance to allow for line length to be reduced include versions of a band pass filter (FIGS. 5, 6), band stop filter (FIG. 7), and low pass filter (FIG. 9).
    • 传输线滤波器包括第一和第二基本上平行的传输线(20,30),其交替端接地,并且每个传输线(20,30)通过单独的电容器(50,60)耦合到电接地。 耦合电容器(70)连接第一和第二传输线(20,30)。 耦合到第二传输线(30)的RF输出(40)响应于输入到第一传输线(20)上的RF输入(10)的RF信号而输出经滤波的RF信号。 使用串联电容以允许线路长度减小的MIC和MMIC应用包括带通滤波器(图5,6),带阻滤波器(图7)和低通滤波器(图9)的版本。
    • 8. 发明授权
    • MMIC bias apparatus and method
    • MMIC偏置装置和方法
    • US5578961A
    • 1996-11-26
    • US585866
    • 1996-01-16
    • Lyle A. FajenMichael DydykHugh R. Malone
    • Lyle A. FajenMichael DydykHugh R. Malone
    • G05F3/20H03F3/193G05F3/02
    • H03F3/193G05F3/205
    • A microwave monolithic integrated circuit (MMIC) RF-generated bias circuit and method includes an input for receiving an RF signal. A rectifier coupled to the input and to electrical ground produces a rectified RF signal in response. A voltage divider coupled to the rectifier and to the electrical ground receives the rectified RF signal and produces a DC voltage therefrom. An output is coupled to the voltage divider for applying the DC voltage to a MMIC field effect transistor (FET) for biasing. No separate bias battery is required, and efficiency is optimized because the generated bias voltage increases to the point where the amplifier voltage begins to decrease, which in turn reduces the generated bias voltage. The derived bias voltage may be used to control other circuits (e.g., other amplifiers, oscillators, mixers, etc.) which require detection of RF presence.
    • 微波单片集成电路(MMIC)RF产生的偏置电路和方法包括用于接收RF信号的输入端。 耦合到输入和电接地的整流器响应地产生经整流的RF信号。 耦合到整流器和电接地的分压器接收经整流的RF信号并从其产生DC电压。 输出耦合到分压器,用于将直流电压施加到用于偏置的MMIC场效应晶体管(FET)。 不需要单独的偏置电池,并且由于产生的偏置电压增加到放大器电压开始降低的程度,效率被优化,这进而降低产生的偏置电压。 导出的偏置电压可以用于控制需要检测RF存在的其它电路(例如,其它放大器,振荡器,混频器等)。