Patent ID: 8476938

Claim:
A device for generating three mode signals, the device comprising: a voltage setting block including one input terminal configured to receive three input signals of driving voltage, open, and ground, a first resistor including a first terminal and a second terminal, the first terminal of the first resistor being connected to the input terminal, a first metal oxide semiconductor (MOS) transistor including a gate for receiving a first MOS reference voltage, a drain for receiving a power voltage, and a source, the first MOS transistor having a predetermined breakdown voltage, a second resistor including a first terminal and a second terminal, the first terminal of the second resistor being connected to the source of the first MOS transistor, a third resistor including a first terminal and a second terminal, the first terminal of the third resistor being grounded, and a first node connected to the second terminals of the first resistor, the second resistor, and the third resistor, wherein the voltage setting block is configured to set three voltages based on the three input signals; and an output block including two output terminals and a second node configured to receive the three voltages from the voltage setting block, and configured to output three combined signals by comparing each of the three voltages received through the second node with a reference voltage.