DIGITAL PHASE LOCKED LOOP APPARATUS

摘要

Disclosed in the present invention is a digital phase locked loop apparatus. According to the present invention, provided is a digital phase locked loop apparatus which comprises a digital control oscillator outputting a signal having a frequency and a phase corresponding to a control code; a divider dividing a signal output from the digital control oscillator to output feedback clock having preset magnification of an reference clock; a sampler sampling the reference clock by the feedback clock to output a digital code; and a digital filter comparing the digital code which the sampler output before and a digital code currently output to output a control code for phase control of signal which the digital control oscillator outputs.