SEMICONDUCTOR INTEGRATED CIRCUIT

摘要

PURPOSE: To provide a semiconductor integrated circuit capable of outputting a signal whose level changes in response to an input signal even though the input common level of the input signal fluctuates. CONSTITUTION: This semiconductor integrated circuit is provided with a differential amplifier 12, a common level detection circuit 14 for detecting the common levels of the input signals A and B, and a bias generation circuit 16 for generating a bias voltage to be given to the gate terminal of a MOS transistor to be the constant current source of the differential amplifier 12 on the basis of the detected common levels.