Patent ID: 8878571

Claim:
A driver circuit of a Schottky transistor comprising: an input terminal configured to receive an inputted signal; an output terminal connected to a gate of the Schottky transistor; a first power source line; a second power source line having lower potential than the first power source line; a reference transistor formed in a same manner as the Schottky transistor, at least one of a source and a drain of the reference transistor being connected to the second power source line; a resistor connected between the first power source line and a gate of the reference transistor; a voltage generator connected to a first node between the resistor and the gate of the reference transistor and configured to supply a second node with a voltage being equal to or lower than a voltage at the first node; and a switching element configured to transmit the voltage at the second node to the output terminal in response to the signal inputted to the input terminal, wherein the voltage generator is made of a MOS transistor, a source of the MOS transistor is connected to the first power source line, a drain of the MOS transistor is connected to the second node, and a gate of the MOS transistor is connected to the first node.