Phase-detecting device

A phase-detecting device for generating a delay control signal to delay a reference signal by different delay times according to said delay control signal, the phase-detecting device comprising:

• a phase detector for detecting a phase difference between said reference signal and a feedback signal and then outputting a detected signal;
• and
• a dragging device, coupled to said phase detector, for outputting said delay control signal according to said detected signal so as to adjust a delay time of said reference signal;
• wherein the dragging device can first be used to increase the delay time of the reference signal for temporally replacing the phase detector, then when the feedback signal falls within a safe lock range, the dragging device is disabled and the detected signal is served as the delay control signal;
• and
• wherein said dragging device comprises:
• an inversion logic circuit, coupled to said phase detector, for inverting said detected signal and outputting an inverted detected signal;
• a delay device, coupled to said inversion logic circuit, for delaying said inverted detected signal;
• a latch device, coupled to said delay device, for outputting a latch signal according to said delayed inverted detected signal;
• and
• an OR logic circuit, coupled to said phase detector and said latch device, for outputting said delay control signal according to said detected signal and said latch signal.

A phase-detecting device for generating a delay control signal and generating different delay times according to said delay control signal, said phase-detecting device comprising:

• a phase detector for detecting a phase difference between a reference signal and a feedback signal and then outputting a detected signal;
• an inversion logic circuit, coupled to said phase detector, for inverting said detected signal to output an inverted detected signal;
• a latch device, coupled to said inversion logic circuit, for outputting a latch signal according to said inverted detected signal;
• and
• an OR logic circuit, coupled to said phase detector and said latch device for outputting said delay control signal according to said detected signal and said latch signal.

A phase-detecting device which generates a delay control signal to delay a reference signal by different delay times according to said delay control signal, said phase-detecting device comprising:

• a phase detector for detecting a phase difference between said reference signal and a feedback signal and then outputting a detected signal;
• an inversion logic circuit, coupled to said phase detector, for inverting said detected signal to output an inverted detected signal;
• a delay device, coupled to said inversion logic circuit, for delaying said inverted detected signal;
• a latch device, coupled to said delay device, for outputting a latch signal according to said delayed inverted detected signal;
• and
• an OR logic circuit, coupled to said phase detector and said latch device for outputting said delay control signal according to said detected signal and said latch signal.