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    • 1. 发明授权
    • High dynamic range millimeter wave power detector with temperature
compensation
    • 高动态范围毫米波功率检测器,具有温度补偿功能
    • US5873029A
    • 1999-02-16
    • US802085
    • 1997-02-19
    • Christopher David GrondahlDavid Warren CormanKenneth Vern Buer
    • Christopher David GrondahlDavid Warren CormanKenneth Vern Buer
    • G01R21/12H04B1/036H04B1/04
    • G01R21/12H04B1/036
    • An RF power detector (10) includes an RF detector circuit (12), a nonlinear feedback amplifier (14), a temperature compensation circuit (16) and a linear feedback amplifier circuit (18). The RF detector circuit converts an RF signal to a voltage representative of the RF signals power level. Nonlinear feedback amplifier (14) nonlinearly amplifies the voltage and compensates for the nonlinearities of the RF detector circuits detector elements. Temperature compensation element provides a temperature compensation signal to compensate for the temperature effects of the detector elements of RF detector circuit (12). The output signal of RF power detector (10) is a substantially linearly representation of the RF input signals power level. Nonlinear feedback amplifier (14) includes a nonlinear feedback circuit (30) with a nonlinear feedback element (32) in the feedback path of op-amp (42). Power detection at microwave and millimeter wave frequencies is accomplished with the high dynamic range, high sensitivity, low minimum detection level and temperature sensitivity. The RF power detector is very producable and requires virtually no manual circuit tailoring or tuning.
    • RF功率检测器(10)包括RF检测器电路(12),非线性反馈放大器(14),温度补偿电路(16)和线性反馈放大器电路(18)。 RF检测器电路将RF信号转换成表示RF信号功率电平的电压。 非线性反馈放大器(14)非线性放大电压并补偿RF检测器电路检测器元件的非线性。 温度补偿元件提供温度补偿信号以补偿RF检测器电路(12)的检测器元件的温度影响。 RF功率检测器(10)的输出信号是RF输入信号功率电平的基本线性表示。 非线性反馈放大器(14)包括在运算放大器(42)的反馈路径中具有非线性反馈元件(32)的非线性反馈电路(30)。 微波和毫米波频率下的功率检测是通过高动态范围,高灵敏度,低最小检测水平和温度灵敏度实现的。 RF功率检测器是非常可生产的,并且实际上不需要手动电路调整或调谐。
    • 2. 发明授权
    • Method and apparatus for reducing distortion in a high efficiency power
amplifier
    • 降低高效功率放大器失真的方法和装置
    • US5936464A
    • 1999-08-10
    • US962731
    • 1997-11-03
    • Christopher David Grondahl
    • Christopher David Grondahl
    • H03F1/02H03F3/38
    • H03F1/0222
    • A method and apparatus for efficient power amplification of a wideband signal with a correspondingly wide modulation bandwidth includes an envelope detector (220), an envelope amplifier (270), a driver amplifier (250), and a power amplifier (260). The driver amplifier (250) includes a dual gate variable gain amplifier (252) that has a substantially constant phase characteristic over a wide dynamic range. The power amplifier (260) is modulated by an amplified envelope signal from the envelope amplifier (270), and is driven by an output of the driver amplifier (250). The operation of the cascaded driver amplifier (250) and power amplifier (260) allow the power amplifier (260) to operate a substantially constant compression point, and reduced distortion.
    • 具有对应宽调制带宽的宽带信号的有效功率放大的方法和装置包括包络检测器(220),包络放大器(270),驱动放大器(250)和功率放大器(260)。 驱动器放大器(250)包括在宽动态范围内具有基本上恒定的相位特性的双门可变增益放大器(252)。 功率放大器(260)由来自包络放大器(270)的放大的包络信号调制,并由驱动放大器(250)的输出驱动。 级联驱动放大器(250)和功率放大器(260)的操作允许功率放大器(260)操作基本上恒定的压缩点,并减少失真。