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    • 4. 发明公开
    • 연산 증폭 회로
    • 操作放大器电路
    • KR1020100084477A
    • 2010-07-26
    • KR1020100003451
    • 2010-01-14
    • 세이코 인스트루 가부시키가이샤
    • 스도우미노루
    • H03F3/45
    • H03F3/45233H03F2203/45292
    • PURPOSE: The operational amplification circuit modulates the cascade bias voltage of the folded cascade circuit with the current of the input differential motion shift. In that way the stable operation can be accomplished by the low noise and low current consumption. CONSTITUTION: The P-type MOS transistor(MP1, MP2) differential pair and NMOS transistor differential pair commonly the positive input terminal and negative input terminal. Supplies the operating current to the first constant current circuit(Ib1) is the differential pair of 2. It converts the current of the first constant current circuit in the differential pair of 2 and the current-switch circuit supplies. The second and the third stable-currents circuit are serially connected with the cascade connection type current mirror circuit.
    • 目的:运算放大电路利用输入差分运动偏移的电流调制折叠级联电路的级联偏置电压。 这样可以通过低噪音和低电流消耗来实现稳定的操作。 构成:P型MOS晶体管(MP1,MP2)差分对和NMOS晶体管差分对通常为正输入端和负输入端。 将工作电流提供给第一个恒流电路(Ib1)是2的差分对。它将2的差分对中的第一恒流电路的电流和电流开关电路电源进行转换。 第二和第三稳定电流电路与级联连接型电流镜电路串联连接。