| 摘要 |
A control circuit of a switching state detecting device for a switch controls the value of a resistive element connected between one end of the switch (SW), of which the switching state is to be detected, and the power source or ground line, so the range of operating voltage can be widened, the current flowing at the time of switching on is suppressed so that power consumption of an electronic apparatus provided with the switching state detecting device for a switch is reduced, and improvement in detection precision can be made by causing the detection current to flow in a sure manner.
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