| 摘要 |
<p>PURPOSE: To start stabilized voltage generation part applying stabilized power voltage to a control part, to start the control part and to permit the control part itself to share a countermeasure against the instantaneous interruption of a power circuit controlling the driving of the stabilized voltage generation part. CONSTITUTION: A voltage detection circuit 4 outputting HiZ when a power supply switch SW is depressed, a differentiation circuit 5 generating differentiation output by the HiZ output of the voltage detection circuit 4 and a transistor switch 6 which is turned on for prescribed time by differential output are provided. The voltage generation circuit 3 is started by the output of the transistor switch 6 for prescribed time.</p> |
