| 摘要 |
PURPOSE:To attain surely the reset of the circuit by inserting a P channel FET of diode connection between the gate electrde of an N channel FET and a power supply. CONSTITUTION:Diodes 9, 12 fix the potential of points M and R to zero V when a power supply voltage is zero V. Further, the capacitance of a capacitor 8 is made larger than that of a capacitor 7 in order to avoid the potential at the point M from following the power supply voltage when the power supply voltage rises. After the application of power, the potential reaches V1 being the sum of respective therehold values of FETs 11, 13 and the voltage at the point R starts to decrease. Further, a voltage VH3 reaches a threshold value V11 of an inverter 14, a voltage VR4 at an output point rises to the power supply voltage from zero V and the circuit is reset. |
