| 摘要 |
PURPOSE:To avoid the load change after a power source supervising means starts the action and to supply a stable driving power source to respective parts when a continuous abnormality does not occur by supplying forcibly a driving power source to respective parts of electronic equipment for a while after an power source turning-on request occurs. CONSTITUTION:When an power source switch is turned on, an power source 1 is advanced and the voltage of an power source line S1 starts to advance, a microprocessor 4a is reset. By the action of the processor 4a, a voltage supervising circuit 4b executes a voltage supervising action over a constant time, and simultaneously, executes other checking. A delaying circuit 6, after the power source switch is turned on, outputs a signal S5 of an L level for a constant time and inputs it to a buffer circuit 7. By an output S4 of a NAND circuit 3 to make an output S6 of the circuit 7 or the output of the processor 4a into an input, an A point is made into a level 1. By the potential of the A point, a relay 2 is driven, and the stable power source 1 is supplied forcibly to respective parts of an action circuit 5 after a constant time.
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