Clock-generating device and clock data recovery device

Abstract

A clock data recovery devicegenerates a recovered clock Recovered Clock and recovered data Recovered Data based on an input signal Data In, and includes a signal selector, a phase delay unit, a time measurement unit, a phase selector, an edge detector, a polarity detector, a logic inverter, and a data output unit. The signal selector, the phase delay unit, the time measurement unit, and the phase selectorconstitute a clock-generation deviceA. The phase delay unitincludes a plurality of cascaded delay elementsto. The phase selectorselects a signal output from the delay element in a position corresponding to a unit interval time among the delay elementsto, and outputs the signal as a feedback clock Feedback Clock.