| 摘要 |
A semiconductor integrated circuit capable of stabilizing the amplitude and the offset potential of the output signals without increasing the number of operational amplifiers in a line driver for outputting small-amplitude differential signals to external. The semiconductor integrated circuit includes an output circuit including plural transistors supplied with differential signals, for performing switching operation; a first transistor connected between a first power supply potential and the output circuit; a second transistor connected between the output circuit and a second power supply potential; a third transistor connected to the first power supply potential; a fourth transistor forming a current mirror circuit together with the second transistor to flow therein a current proportional to that flowing in the second transistor; a first resistance and a second resistance disposed in a path of a current flowing between the third transistor and the fourth transistor; and a differential amplifier for controlling gate potentials of the first and third transistors such that a potential at a connection point between the first resistance and the second resistance approaches a predetermined potential.
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