A MOS output driver with linear current/voltage characteristics (the output impedance is constant when output voltage changes for example) is composed of the first and the second input transistors for inputting the first and the second input signals and with their output nodes coupled with the output node of circuit, the first and the second transistor pairs for generating the second and the fourth control signals according to the first and the third control signals and output signal, and the first and the second output transistors for receiving the second and the fourth control signals and with their output nodes coupled to the output node of circuit. |