Patent attributes
Providing a circuit for preventing simultaneous ON operations at a relay drive apparatus, which can prevent the simultaneous ON operations securely, the circuit includes a first diode, a second diode, a first transistor connected through the first diode with a first drive unit for controlling ON/OFF operation, a second transistor connected through the second diode with the second drive unit for controlling ON/OFF operation, a first junction point of the first resistor and the first drive unit, a second junction point of the second resistor and the second drive unit, a third junction point of the first diode and the first transistor, a fourth junction point of the second diode and the second transistor, a third diode connected with the second junction point and the third junction point, and a fourth diode connected with the first junction point and the fourth junction point.
