Patent ID: 7405596

Claim:
A driver circuit integrated on a semiconductor substrate and driving an external circuit connected to the circuit, the driver circuit comprising: a control-stage circuit connected to a voltage source having a first high voltage and a voltage source having a first low voltage lower than the first high voltage, and outputting a control voltage based on any of the first high voltage or the first low voltage selected depending upon an input voltage; and an output-stage circuit connected to a voltage source having a second high voltage and a voltage source having a second low voltage lower than the second high voltage, and outputting an output voltage based on any of the second high voltage or the second low voltage selected depending upon the control voltage; the output-stage circuit having a first output transistor that puts a first channel between the voltage source having the second high voltage and an output terminal in a conductive state when applied with the control voltage based on the first low voltage, and puts the first channel in a non-conductive state when applied with the control voltage based on the first high voltage, and a second output transistor that puts a second channel between the voltage source having the second low voltage and the output terminal in a conductive state when applied with the control voltage based on the first high voltage, and puts the second channel in a non-conductive state when applied with the control voltage based on the first low voltage, wherein the first high voltage is higher than the second high voltage and the first low voltage is lower than the second low voltage, and the voltage source having the first high voltage has a positive booster circuit that positively increases the second high voltage by predetermined multiples, and a regulator that generates the first high voltage based on an output voltage of the positive booster circuit; the voltage sources having the first and second low voltages including a negative booster circuit that negatively increases the second high voltage by predetermined multiples, a regulator that generates the first low voltage based on an output voltage of the negative booster circuit, and a regulator that generates the second low voltage based on an output voltage of the negative booster circuit.