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    • 4. 发明授权
    • Dual-adjustment balance circuit for operational amplifiers
    • 用于运算放大器的双调平衡电路
    • US4207536A
    • 1980-06-10
    • US882781
    • 1978-03-02
    • Paul H. Lewis
    • Paul H. Lewis
    • H03F3/45
    • H03F3/45479H03F2200/369
    • A method and circuit for balancing the offset voltage of an operational amplifier having an input resistor connected to an inverting input, and a feedback resistor connected to and between the inverting input and the amplifier output. The circuit is made up of an adjustable voltage divider network connected to the positive and negative power supplies of the amplifier and includes coarse and fine potentiometers for applying a first adjustable voltage to the inverting input to set the inverting voltage to zero, and a third potentiometer for applying a second adjustable voltage to the non-inverting input to set the amplifier output voltage to zero. The resulting offset voltage balance is generally insensitive to changes in values of the input resistor and the feedback resistor.
    • 一种用于平衡具有连接到反相输入的输入电阻的运算放大器的偏移电压的方法和电路,以及连接到反相输入和放大器输出之间和之间的反馈电阻器。 该电路由连接到放大器的正电源和负电源的可调节分压器网络组成,并且包括用于向反相输入端施加第一可调电压以将反相电压设置为零的粗细电位器和第三电位计 用于将第二可调电压施加到非反相输入以将放大器输出电压设置为零。 所产生的偏移电压平衡通常对输入电阻和反馈电阻的值的变化不敏感。