Device and method for duty cycle correction

The present invention relates to a digital duty cycle correction circuit that corrects the duty of the clock signal input is applied to an input terminal or an output terminal of the delay lock loop circuit in a ratio of 50:50. Digital duty-cycle correction circuit according to the present invention as compared to the duty detector and the control voltage for generating a control voltage according to the duty cycle of the clock signal input and a comparator for converting into a digital signal of 1 bit, and 1 from the comparator a digital code value for the counter and the counter for performing operations in accordance with the bit digital signal depending on the value of the D / a converter and the control voltage to be converted to an analog signal comprises a duty corrector for correcting the output of the duty of the clock inputted from the outside . In addition, a digital duty cycle correction method that includes the step of comparing the average value of the charge generating and the step of generating a mean value of the electric charge corresponding to the duty of the input clock into a digital signal, the digital signal in the present invention according to the duty information of the digital clock and the step of performing an operation includes the step of using the converting to an analog signal and an input control voltage to compensate for the duty of the external clock. The duty cycle corrector