| 摘要 |
Disclosed is a driver circuit for producing a voltage output in highly precise fashion with little consumption of power. The driver circuit includes a first follower transistor and a first switch connected between an output terminal and a high-potential power supply; a first current source and a second switch connected serially between the output terminal and a low-potential power supply; a second follower transistor and a third switch connected between the output terminal and the low-potential power supply; a second current source and a fourth switch connected between the output terminal and the high-potential power supply; and first and second gate bias control means for supplying the first and second transistor with bias voltages based upon an input signal voltage. At one timing in a low-potential data output interval, the first switch is turned on, thereby causing the first transistor to perform a follower operation to drive output voltage to the vicinity of a certain voltage defined in conformity with the input signal voltage. The second switch is turned on at a timing subsequent to the one timing, thereby controlling the drain current of the first transistor and driving the output voltage to the certain voltage highly precisely in conformity with the input signal voltage. At one timing in a high-potential data output interval, the third switch is turned on and then the fourth switch is turned on subsequently.
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