| 摘要 |
PURPOSE: To immediately disconnect currents, to prevent the destruction of a switch or a load, and to use a power source with a single polarity by monitoring currents running through a current detecting switch, and detecting an excess current state. CONSTITUTION: Nodes 18 and 18' with a high voltage are mutually connected, and ground sides are mutually connected. Moreover, current switches S1 -S4 are connected with each load connecting lines L1 -L4 . Those current switches are controlled by signals supplied to gates G1 -G4 . The signal is supplied to the gates G1 and G4 of the switches S1 and S4 , and the corresponding switch is turned on in order to allow currents pass a load 14 along a direction shown by an arrow 25. On the other hand, the signal is transmitted to the gates G2 and G3 of the current switches S2 and S3 , and the state of the switch-off is continued. |
