Differential signaling circuit for correcting for duty change due to NBTI degradation, operating method thereof, and semiconductor device including the same

A semiconductor system comprising:

• a first semiconductor device;
• and
• a second semiconductor device comprising a differential signaling circuit,
• wherein the differential signaling circuit comprises:
• a differential amplifier configured to generate differential signals;
• a first signal path circuit;
• a second signal path circuit;
• a phase control circuit configured to receive the differential signals having a common phase, output DC signals having a common level in a first operating period, and to transmit the differential signals to the first signal path circuit and the second signal path circuit, respectively, in a second operating period;
• and
• a duty ratio correction circuit connected between the first signal path circuit and the second signal path circuit, and configured to control duty ratios of the differential signals to be equal to each other in the second operating period.

A differential signaling method comprising:

• receiving differential signals having a common phase;
• generating DC signals, each having a common level in a first operating period;
• transmitting the DC signals to a first signal path circuit and a second signal path circuit, respectively;
• transmitting the differential signals to the first signal path circuit and the second signal path circuit, respectively, in a second operating period;
• and
• controlling duty ratios of the differential signals to be equal to each other in the second operating period.