| 摘要 |
A digital circuit including a processor operated in synchronization with a clock signal to output a control signal to be fed to an actuator, in which a converter converts a period of frequency of the clock signal to an analog voltage value, and a comparator compares whether or not the analog voltage value is within a reference value range to output a comparison signal, and in which a holding device allows the control signal to pass or stop to the actuator on the basis of the comparison signal.
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