主权项 |
1. A self-discharging circuit discharging an electrical charge of an external energy storage device coupled to a power transmission line coupled between a power supply device and a load, comprising:
a current-limiting unit coupled between the power transmission line and a first node; an internal energy storage unit coupled between the first node and a ground node,
wherein the ground node receives a ground level; a voltage detection unit detecting a level of the first node; and a discharge unit coupled between the power transmission line and a second node,
wherein when the level of the first node is less than a pre-determined level, the voltage detection unit directs the second node to couple to the ground node. |