Device and method of correcting duty cycle

A device of correcting duty cycle, comprising:

• a duty cycle correcting circuit, generating a pair of phase-shifting clocks in accordance with a pair of complementary clocks, regenerating a regenerated clock in accordance with the pair of phase-shifting clocks, and comprising a coarse adjustment delaying unit, a fine adjustment delaying unit and a regenerating circuit in series connection sequentially, wherein:
• the coarse adjustment delaying unit delays the pair of complementary clocks to generate a pair of first clocks having a first phase shift, the fine adjustment delaying unit delays the pair of first clocks to generate the pair of phase-shifting clocks having a second phase shift, and the regenerating circuit regenerates the regenerated clock in accordance with the pair of phase-shifting clocks;
• a controller of the duty cycle correcting circuit, coupling to the duty cycle correcting circuit;
• and
• a duty cycle detecting circuit, coupling to the duty cycle correcting circuit and the controller of the duty cycle correcting circuit, and generating a detecting output to the controller of the duty cycle correcting circuit in accordance with a current duty cycle of the regenerated clock;
• wherein the controller of the duty cycle correcting circuit controls the duty cycle correcting circuit in accordance with the detecting output to adjust the pair of phase-shifting clocks.