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    • 9. 发明授权
    • 이득제어 수단을 구비한 전류 미러형 증폭회로
    • 具有增益控制测量的电流型放大器电路
    • KR1019900008361B1
    • 1990-11-17
    • KR1019870007623
    • 1987-07-15
    • 도오꼬오가부시끼가이샤
    • 다니까와히로시
    • H03G3/30
    • The gain control circuit includes a current source for current mirror circuit that is constituted with the output stage of another current mirror circuit. Among the junctions of the current mirror circuits the bias side junction of the first current mirror cituit is used as an input terminal and the other as an output terminal. A predetermined current is supplied to a resistor connected to the emitter of the bias side transistor of the first current mirror circuit to obtain a predetermined gain. Application of a signal to the resistor, which signal is opposite in phase to an input signal, serves to cancel the influence of the input signal to thereby eliminate fluctuations in the gain.
    • 增益控制电路包括由另一电流镜电路的输出级构成的电流镜电路的电流源。 在电流镜电路的接点中,将第一电流镜电路的偏置侧结用作输入端子,另一个用作输出端子。 向与第一电流镜电路的偏置侧晶体管的发射极连接的电阻器提供预定电流以获得预定的增益。 将信号施加到电阻器,该信号与输入信号相位相反,用于消除输入信号的影响,从而消除增益的波动。