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    • 3. 发明公开
    • VARIABLE PHASE SHIFTER AND PHASE SHIFTING METHOD
    • Variabler Phasenschieber und Phasenverschiebungsverfahren
    • EP2738940A2
    • 2014-06-04
    • EP13183799.9
    • 2013-09-10
    • FUJITSU LIMITED
    • Sato, Masaru
    • H03H11/20
    • H03B21/00H03H11/20
    • The variable phase shifter (10) includes: a transmission line (12) that outputs quadrature signals from a pair of output ports (24A, 24B) in response to an input signal (Sin) of a specific frequency; a synthesizer (14) that includes a first transistor (Ma) connected to a first port of the pair of output ports and a second transistor (Mb) connected to a second port of the pair of output ports, and that on input of the input signal takes signals output from the pair of output ports of the transmission line with a phase according to their respective load impedances (Za, Zb) and employs the first and the second transistors to amplify and combine the signals; and a phase controller that controls the phase of the output signal that is combined and output by the synthesizer by controlling the amplification operation of each of the first and second transistors of the synthesizer via application of suitable gate voltages (Va, Vb).
    • 可变移相器(10)包括:响应于特定频率的输入信号(Sin)从一对输出端口(24A,24B)输出正交信号的传输线(12) 合成器(14),其包括连接到所述一对输出端口的第一端口的第一晶体管(Ma)和连接到所述一对输出端口的第二端口的第二晶体管(Mb),以及在所述输入端 信号根据各自的负载阻抗(Za,Zb)从相对于传输线对的输出端口输出信号,并采用第一和第二晶体管来放大并组合信号; 以及相位控制器,其通过施加合适的栅极电压(Va,Vb)来控制合成器的每个第一和第二晶体管的放大操作来控制由合成器组合和输出的输出信号的相位。
    • 5. 发明公开
    • TUNING AMPLIFIER
    • 可调谐放大器
    • EP0860942A4
    • 2004-03-10
    • EP96905001
    • 1996-03-06
    • IKEDA TAKESHI
    • OHE TADATAKA
    • H03F3/191H03F3/195H03H11/12H03H11/20
    • H03H11/20H03F3/191H03F3/195H03H11/1217
    • A tuning amplifier (1) is provided with two cascade-connected phase-shifting circuits (10C and 30C) and an adding circuit composed of a feedback resistor (70) and input resistor (74). The circuit (10C) is constituted of an operational amplifier (12), a resistor (18) one end of which is connected to the inversion input terminal of the amplifier, a resistor (20) connected between the inversion input terminal and the output terminal of the amplifier (12), a series circuit which comprises a capacitor (14) and a variable resistor (16) and one end of which is connected to the other end of the resistor (18). The fluctuation of the output amplitude of the circuit (10C) is suppressed when the tuning frequency of the circuit (10C) is changed because the resistance values of the resistors (18 and 20) are equal to each other. When the signal inputted to a voltage dividing circuit composed of resistors (21 and 23) is taken out as an output, the amplifier (1) itself has a gain and the amplitude of the signal is amplified simultaneously with the tuning operation. The phase-shifting circuit (30C) has the same structure as that of the circuit (10C), and total phase shift by the circuits (10C and 30C) is 360 DEG at a prescribed frequency. Therefore, the amplifier (1) outputs only a signal having a prescribed frequency as a tuning signal.
    • 8. 发明公开
    • PHASER
    • EP1160906A1
    • 2001-12-05
    • EP99973764.6
    • 1999-11-19
    • NEC Corporation
    • NAKADA, Kuniyoshi NEC Corporation
    • H01P1/18H03H11/20
    • H01P1/185H01P1/184H03H11/20
    • A phase shifter includes a fixed-length transmission line (103) with an electrical length of 180° having one end connected to an end of an input/output transmission line (101), a first variable-length transmission line (104) connected to the other end of the fixed-length transmission line, a second variable-length transmission line (105) connected to an end of an input/output transmission line (102), switches (112, 122) for switching electrical lengths of the variable-length transmission lines (104, 105), switch means (106), including at least two switches (131, 132), for switchingly connecting the end of the input/output transmission line (102) to one or the other end of the fixed-length transmission line, so that an RF signal has a phase shift amount of 0° or 180°, and a control means (107) for controlling the switches (112, 122, 131, 132). The phase shifter can thus downsized.
    • 一种移相器包括:具有180°电长度的固定长度传输线(103),其一端连接到输入/输出传输线(101)的一端;第一可变长度传输线(104),连接到 固定长度传输线的另一端,连接到输入/输出传输线(102)一端的第二可变长度传输线(105),用于切换可变长度传输线的电气长度的开关(112,122) 包括至少两个开关(131,132)的开关装置(106),用于将输入/输出传输线(102)的末端切换地连接到固定装置的一端或另一端 以使得RF信号具有0°或180°的相移量,以及用于控制开关(112,122,131,132)的控制装置(107)。 移相器因此可以小型化。
    • 10. 发明公开
    • TUNING AMPLIFIER
    • ABSTIMMBARERVERSTÄRKER
    • EP0860942A1
    • 1998-08-26
    • EP96905001.2
    • 1996-03-06
    • Ikeda, Takeshi
    • OHE, Tadataka
    • H03F3/191
    • H03H11/20H03F3/191H03F3/195H03H11/1217
    • A tuning amplifier (1) is provided with two cascade-connected phase-shifting circuits (10C and 30C) and an adding circuit composed of a feedback resistor (70) and input resistor (74). The circuit (10C) is constituted of an operational amplifier (12), a resistor (18) one end of which is connected to the inversion input terminal of the amplifier, a resistor (20) connected between the inversion input terminal and the output terminal of the amplifier (12), a series circuit which comprises a capacitor (14) and a variable resistor (16) and one end of which is connected to the other end of the resistor (18). The fluctuation of the output amplitude of the circuit (10C) is suppressed when the tuning frequency of the circuit (10C) is changed because the resistance values of the resistors (18 and 20) are equal to each other. When the signal inputted to a voltage dividing circuit composed of resistors (21 and 23) is taken out as an output, the amplifier (1) itself has a gain and the amplitude of the signal is amplified simultaneously with the tuning operation. The phase-shifting circuit (30C) has the same structure as that of the circuit (10C), and total phase shift by the circuits (10C and 30C) is 360° at a prescribed frequency. Therefore, the amplifier (1) outputs only a signal having a prescribed frequency as a tuning signal.
    • 调谐放大器(1)具有两个级联连接的移相电路(10C和30C)和由反馈电阻(70)和输入电阻(74)组成的加法电路。 电路(10C)由运算放大器(12),其一端连接到放大器的反相输入端的电阻(18),连接在反相输入端和输出端之间的电阻(20) 放大器(12)的串联电路,其包括电容器(14)和可变电阻器(16),其一端连接到电阻器(18)的另一端。 由于电阻(18,20)的电阻值彼此相等,电路(10C)的调谐频率发生变化时,电路(10C)的输出振幅的变动被抑制。 当输入到由电阻器(21和23)组成的分压电路的信号作为输出时,放大器(1)本身具有增益,并且信号的幅度与调谐操作同时被放大。 移相电路(30C)具有与电路(10C)相同的结构,并且电路(10C和30C)的总相移在规定频率下为360度。 因此,放大器(1)仅输出具有规定频率的信号作为调谐信号。