1results about How to "Detect disconnection" patented technology

The present application can detect a disconnection of a ground fault detection circuit generated during output operation of an output circuit. A ground fault detection device connected to an output circuit insulated from the ground, the ground fault detection device comprising: a midpoint resistor provided between a pair of output lines of the output circuit; a ground fault detection resistor provided between the midpoint resistor and the ground; an amplifier having a + input terminal connected to one end of the ground fault detection resistor and a - input terminal connected to the other end of the ground fault detection resistor; a pull-up resistor provided between the one end of the ground fault detection resistor and the + input terminal of the amplifier and connected to a positive power supply voltage; a pull-down resistor provided between the other end of the ground fault detection resistor and the - input terminal of the amplifier and connected to a negative power supply voltage; and a disconnection detection unit that detects a disconnection of the ground fault detection resistor.