Disclosed is an electronic device including a counter suitable for counting a clock signal and generating a count signal corresponding to a count value of the clock signal, a target count generator suitable for generating a target count signal based on the count signal and a second adjusting signal, a comparator suitable for comparing the target count signal with a reference count signal and generating a comparison signal which corresponds to a difference value between the count value corresponding to the target count signal and a count value corresponding to the reference count signal, and a count value adjuster suitable for generating the second adjusting signal corresponding to the difference value, based on the comparison signal.