| 摘要 |
The present invention provides a circuit structure capable of straight/reverse connection of positive and negative electrodes of an input power source, which includes a load, an input power portion, a protection unit, a first switch unit and a second switch unit. The first switch unit and the second switch unit can respectively select an ON or OFF state based on the electrical polarities of a first electrode end and a second electrode end of the input power portion. By this arrangement, the circuit structure of the present invention can be operated normally no matter whether the positive and negative electrodes of the input power source are straightly or reversely connected.
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