Semiconductor device including a calibration circuit capable of generating strobe signals and clock signals having accurate duty ratio and training method thereof

Abstract

A semiconductor device includes a transmission circuit suitable for sequentially outputting pulses corresponding to first to Noutput clocks to a data strobe pad in a training mode; a receiving circuit suitable for generating a rising signal and a falling signal, which are activated respectively at a rising edge and a falling edge of each of the pulses; a calibration circuit suitable for sequentially storing a detection code corresponding to a phase difference between the rising signal and the falling signal in first to Nregisters to calculate an average value of first to Nstored values, according to a period signal, and restoring respective deviations between the average value and each of the first to Nstored values in the first to Nregisters; and a clock generation circuit suitable for adjusting duty ratios of the first to Noutput clocks, using re-stored values of the first to Nregisters.