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    • 7. 发明授权
    • Comparator circuit
    • 比较器电路
    • US4988895A
    • 1991-01-29
    • US541211
    • 1990-06-22
    • Seiichiro KiharaZenpei TaniHisao Nagao
    • Seiichiro KiharaZenpei TaniHisao Nagao
    • H03K5/08H03K3/0233H03K17/30H03K5/153H03K5/24
    • H03K17/30H03K3/02337
    • A novel comparator circuit is disclosed, in which a pulse output is obtained from the output terminal of a differential amplifier through a transistor by applying a threshold voltage to either input terminal of a differential amplifier composed of a pair of transistors and then comparing an input voltage applied to the other input terminal therewith, wherein the aforementioned pair of transistors of the differential amplifier are each composed of two transistors connected in a complex manner, the input voltage is directly inputted, without the use of a buffer or the like, by raising the input impedance of the comparator circuit to thereby simplify the circuit as a whole and to widen its scope of application. Further, the output terminal of the differential amplifier connected to a transistor in an output circuit of the comparator circuit and a power source are connected through a resistor so as to ensure against occurrence of impulses in the output pulses through prevention of operation of the output circuit alone before changing of the threshold voltage for causing a hysteresis property to be imparted to the comparator circuit.
    • 公开了一种新颖的比较器电路,其中通过对由晶体管组成的差分放大器的输入端施加阈值电压,然后将输入电压进行比较,通过晶体管从差分放大器的输出端获得脉冲输出 应用于其他输入端子,其中差分放大器的上述一对晶体管各自由以复合方式连接的两个晶体管组成,直接输入输入电压,而不需要使用缓冲器等,通过提高 比较器电路的输入阻抗,从而简化整个电路并扩大其应用范围。 此外,连接到比较器电路的输出电路中的晶体管和电源的差分放大器的输出端子通过电阻器连接,以便通过防止输出电路的操作来确保不会在输出脉冲中产生脉冲 在改变阈值电压之前单独地将滞后特性赋予比较器电路。