| 摘要 |
PURPOSE:To deliver a reset signal even with an instantaneous service interruption by connecting the middle point between a capacitor and a resistance connected between the stabilized voltages of a series stabilizing circuit to the middle point between a resistance and a constant voltage element connected between non-stabilized voltages via a diode. CONSTITUTION:The DC voltage (c) supplied to terminals 1 and 2 is stabilized by a series regulator 3 and supplied to a load 10. In this case, the middle point (a) between a capacitor 5 and a resistance 4 connected between stabilized voltages (d) is connected to the middle point (b) between a resistance 12 and a constant voltage element 11 connected between non-stabilized voltages (c) via a diode 13. Thus the voltage (e) of the point (a) drops when the voltage (c) has an instantaneous drop A, and a reset output (f) can be delivered to a reset terminal 8. This can prevent a malfunction due to a dip B of the voltage (d) which is generated by an instantaneous service interruption. |
