Patent ID: 7688690

Claim:
A data phase locked loop capable of being activated during track-seeking comprising: a phase detector for generating a phase-adjusting signal based on an input signal and a feedback signal of an optical device; a frequency detector for generating a frequency-adjusting signal based on the input signal of the optical device and the feedback signal; an adjusting circuit for generating the feedback signal based on the phase-adjusting signal and the frequency-adjusting signal; and a control circuit for generating and sending a trigger signal to the phase detector and the frequency detector for activating the phase detector and the frequency detector when a pick-up of the optical device is performing track-seeking on a storage medium and is on a data track of the storage medium according to a radio frequency zero cross signal (RFZC signal), the control circuit comprising: an OR gate electrically connected to the optical device for generating an output signal based on the RFZC signal and a track-seeking signal of the optical device; and a multiplexer electrically connected to the optical device and the OR gate for generating the trigger signal based on the track-seeking signal or the output signal of the OR gate.