Duty correction device

摘要

A duty correction device includes: a duty correction unit having a plurality of duty correction cells for selectively activating the duty correction cells according to a count signal to adjust a pulse width of an input clock and output the adjusted clock as an output clock; a phase splitter for generating a rising and a falling clocks by phase-splitting the output clock; a DCC pumping unit for generating a rising and a falling duty ratio correction signals according to a reset signal; a voltage comparing unit for generating counting increase and decrease signals according to a result of comparing the rising and the falling duty ratio correction signals in response to a comparison control signal; a comparison control unit for generating the comparison control signal and the reset signal; and a counter for increasing/decreasing a value of the count signal according to the counting increase and decrease signals.