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    Amplifier circuit
    2.
    发明公开
    Amplifier circuit 失效

    公开(公告)号：EP0340719A3

    公开(公告)日：1991-02-27

    申请号：EP89107927.9

    申请日：1989-05-02

    申请人： KABUSHIKI KAISHA TOSHIBA

    发明人： Imanishi, Kazuo c/o Intellectual Property Div.

    IPC分类号： H03G3/12 ,  H03G1/00

    CPC分类号： H03G3/12 ,  H03G1/0023

    摘要： An amplifier circuit comprises an amplifying sec­tion for amplifying an input signal voltage, and feed­back resistances (R2, R3) for supplying part of an output voltage of the amplifying section as a negative feedback signal voltage thereto. The amplifying section of the amplifier circuit includes a first voltage-­current converting amplifier (Q1, Q2) for converting an input signal voltage into a corresponding current, a second voltage-current converting amplifier (Q3, Q4) for converting a negative feedback signal voltage into a corresponding current, an active load circuit (Q5, Q6, Q9) for coupling output currents of the first and second voltage-current converting amplifier (Q1, Q2, Q3, Q4), which are set in an opposite phase relation, and generating an output voltage corresponding to the sum of the coupled currents, a voltage amplifier (21) for amplifying the output voltage of the active load circuit (Q5, Q6, Q9), and a control circuit (VB, R3, Q7, Q8, I0) for controlling the ratio of the mutual conductances of the first and second voltage-current converting amplifiers (Q1, Q2, Q3, Q4).

    Amplifier circuit
    3.
    发明公开
    Amplifier circuit 失效
    放大器电路

    公开(公告)号：EP0340719A2

    公开(公告)日：1989-11-08

    申请号：EP89107927.9

    申请日：1989-05-02

    申请人： KABUSHIKI KAISHA TOSHIBA

    发明人： Imanishi, Kazuo c/o Intellectual Property Div.

    IPC分类号： H03G3/12 ,  H03G1/00

    CPC分类号： H03G3/12 ,  H03G1/0023

    摘要： An amplifier circuit comprises an amplifying sec­tion for amplifying an input signal voltage, and feed­back resistances (R2, R3) for supplying part of an output voltage of the amplifying section as a negative feedback signal voltage thereto. The amplifying section of the amplifier circuit includes a first voltage-­current converting amplifier (Q1, Q2) for converting an input signal voltage into a corresponding current, a second voltage-current converting amplifier (Q3, Q4) for converting a negative feedback signal voltage into a corresponding current, an active load circuit (Q5, Q6, Q9) for coupling output currents of the first and second voltage-current converting amplifier (Q1, Q2, Q3, Q4), which are set in an opposite phase relation, and generating an output voltage corresponding to the sum of the coupled currents, a voltage amplifier (21) for amplifying the output voltage of the active load circuit (Q5, Q6, Q9), and a control circuit (VB, R3, Q7, Q8, I0) for controlling the ratio of the mutual conductances of the first and second voltage-current converting amplifiers (Q1, Q2, Q3, Q4).

    摘要翻译： 放大器电路包括用于放大输入信号电压的放大部分和用于提供放大部分的输出电压的一部分作为负反馈信号电压的反馈电阻（R2，R3）。 放大器电路的放大部分包括用于将输入信号电压转换成相应电流的第一电压 - 电流转换放大器（Q1，Q2），用于将负反馈信号电压（Q3，Q4）转换成第二电压 - 电流转换放大器 （Q1，Q2，Q3，Q4）的输出电流进行耦合的有源负载电路（Q5，Q6，Q9），以及设置为相反相位关系的有源负载电路 产生对应于耦合电流之和的输出电压，用于放大有源负载电路（Q5，Q6，Q9）的输出电压的电压放大器（21）以及控制电路（VB，R3，Q7，Q8， I0），用于控制第一和第二电压 - 电流转换放大器（Q1，Q2，Q3，Q4）的互导率的比值。