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    • 13. 发明授权
    • Detector circuit and semiconductor device using same
    • 检测电路和使用其的半导体器件
    • US08558549B2
    • 2013-10-15
    • US12941134
    • 2010-11-08
    • Kazuya YamamotoTomoyuki AsadaMiyo Miyashita
    • Kazuya YamamotoTomoyuki AsadaMiyo Miyashita
    • G01R31/00G01R25/02
    • G01R31/2822G01R23/20H03F3/24H04B1/0475H04B17/103
    • A detector circuit for detecting degradation in the distortion characteristics of a power amplifier based on signals from both ends of a coupled line of a directional coupler. The detector circuit includes a phase shifter/attenuator for phase shifting and attenuating a signal from a coupled terminal of the coupled line, a differential amplifier for outputting difference between an output signal from the phase shifter/attenuator and a signal from the isolated terminal of the coupled line, a wave detector circuit for converting the difference into a DC signal, and a comparing circuit for determining whether the voltage level of the DC signal exceeds a predetermined level. When degradation in the distortion characteristics of the power amplifier arises, the phase shifter/attenuator phase shifts the signal from the coupled terminal and outputs a signal 180° out of phase with the signal from the isolated terminal.
    • 一种用于根据来自定向耦合器的耦合线的两端的信号来检测功率放大器的失真特性的劣化的检测器电路。 检测器电路包括用于相移和衰减来自耦合线的耦合端的信号的移相器/衰减器,用于输出来自移相器/衰减器的输出信号与来自该移相器/衰减器的隔离端的信号的差分放大器 耦合线,用于将差值转换为DC信号的波检测器电路,以及用于确定DC信号的电压电平是否超过预定电平的比较电路。 当功率放大器的失真特性出现降低时,移相器/衰减器将来自耦合端子的信号相移,并输出与隔离端子信号180°异相的信号。
    • 16. 发明申请
    • POWER AMPLIFIER
    • 功率放大器
    • US20120062321A1
    • 2012-03-15
    • US13079046
    • 2011-04-04
    • Kazuya YamamotoMiyo MiyashitaSatoshi SuzukiTakayuki Matsuzuka
    • Kazuya YamamotoMiyo MiyashitaSatoshi SuzukiTakayuki Matsuzuka
    • H03F3/20
    • H03F3/195H03F1/0277H03F3/189H03F3/245H03F3/72H03F2200/27H03F2200/411H03F2203/7206H03F2203/7236H03G1/0088
    • A power amplifier comprises: an amplifying transistor for amplifying an input signal; a reference voltage generating circuit which generates a reference voltage; a bias circuit generating a bias voltage based on the reference voltage and supplying the bias voltage to the amplifying transistor; and a booster elevating an enable voltage input from outside and outputting the enable voltage. The reference voltage generating circuit is turned ON/OFF in correspondence with an output voltage of the booster. The booster includes: an enable terminal to which the enable voltage is applied; a power source terminal connected to a power source; a transistor having a control electrode connected to the enable terminal, a first electrode connected to the power source terminal, and a second electrode that is grounded; and a FET resistor connected between the first electrode of the transistor and the power source terminal. A gate electrode of the FET resistor is open.
    • 功率放大器包括:放大晶体管,用于放大输入信号; 产生参考电压的基准电压产生电路; 偏置电路,基于所述参考电压产生偏置电压,并将所述偏置电压提供给所述放大晶体管; 并且升压器提升从外部输入的使能电压并输出使能电压。 参考电压产生电路对应于升压器的输出电压而导通/截止。 升压器包括:施加使能电压的使能端子; 连接到电源的电源端子; 具有连接到使能端子的控制电极的晶体管,连接到电源端子的第一电极和接地的第二电极; 以及连接在晶体管的第一电极和电源端子之间的FET电阻器。 FET电阻的栅电极断开。
    • 19. 发明授权
    • Directional coupler
    • 定向耦合器
    • US07907032B2
    • 2011-03-15
    • US12464919
    • 2009-05-13
    • Kazuya YamamotoMiyo Miyashita
    • Kazuya YamamotoMiyo Miyashita
    • H01P5/18H03H11/16
    • H01P5/18
    • A directional coupler includes a main line connected at a first end to an input port and at a second end to an output port, a coupled line connected at a first end to a coupled port and at a second end to an isolated port, and a phase shifter connected at a first end to the isolated port and at a second end to the coupled port. The phase shifter phase shifts a second reflected wave component such that the second reflected wave component is opposite in phase to a first reflected wave component, the second reflected wave component traveling from the output port to the coupled port through the isolated port and the phase shifter, the first reflected wave component traveling from the output port to the coupled port through the coupled line.
    • 定向耦合器包括在第一端连接到输入端口并且在第二端连接到输出端口的主线,在第一端处连接到耦合端口并且在第二端部处连接到隔离端口的耦合线,以及 移相器在第一端连接到隔离端口,在第二端连接到耦合端口。 移相器相移第二反射波分量,使得第二反射波分量与第一反射波分量相位相反,第二反射波分量通过隔离端口和相移器从输出端口传播到耦合端口 第一反射波分量从输出端口通过耦合线行进到耦合端口。