| 摘要 |
The invention is to provide a protection circuit comprising a monitoring circuit for sensing the toggled mode of a switch thereof and thus, when a user unexpectedly switches on or off the protection circuit, the monitoring circuit immediately senses a closed or opened signal indicating that the switch has been tripped ON or OFF and then forwards the signal to a control circuit to first terminate the connection between at least one electronic device and an external power supply, and then activate the control circuit to provide electrical power of a battery to the said electronic device and re-connect the external power supply to the electronic device after the electronic device is turned on or off, which achieves the objective of preventing current surges due to sudden switching the protection circuit that can directly damage the electronic device.
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