| 摘要 |
A start circuit including a load unit, a first switch, a second switch and a reset control circuit is provided. The load unit receives a power voltage. The first switch is electrically connected between the load unit and a ground, and receives a node voltage from the reference circuit. The second switch has a first end electrically connected to the reference circuit, a second end electrically connected to the ground, and a control end electrically connected to the second end of the load unit. The second switch determines whether to provide a start voltage to a reference circuit according to a conducting state thereof. The reset control circuit provides a discharge path between the control end of the first switch and the ground, and conducts the discharge path according to the power voltage during a period when the power voltage is smaller than a threshold voltage.
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