APPARATUS FOR RECOVERING CLOCK AND DATA

摘要

a switching means(35) switching a delay signal of data inputted from the external and a clock when data is inputted normally according to the control of LOS signal; a transition point comparison means(31) generating an error voltage according to the difference between the output of the switching means(35) and an oscillation frequency; a filtering means(34) converting the error voltage to a DC voltage; a voltage controlled oscillating means(36) providing the transition point comparison means(31) with the oscillation frequency according to the control of the DC voltage; a signal delay means(33) outputting a delay signal of the oscillation frequency to the switching means(35); and a data retiming means(32) outputting the recovered clock and the retimed data by latching the data inputted from the external according to the oscillation frequency.