SEMICONDUCTOR DEVICE

The present invention relates to a semiconductor device using a differential signal, and including: a first differential amplifier amplifying an external differential signal having a swing width and a differential input cross-point voltage (VIX) defined within a tolerable range of an external voltage with the external voltage, and generating an internal differential signal; a control circuit unit adjusting the swing width and VIX of the internal differential signal to be within the tolerable range of the internal voltage, which has lower voltage level than the external voltage, in response to a control signal; a second differential amplification unit amplifying the internal differential signal of which the swing width and VIX are adjusted by the control circuit unit with the internal voltage and generating an internal synchronization signal; and a duty correction unit correcting a duty of the internal synchronization signal using the internal voltage.