Phase Locked Loop with Current Compensation Mechanism and Its Method

Abstract

The invention discloses a phase locked loop with a current compensation mechanism and a method thereof. This phase-locked loop includes an input buffer, a charge-pumped phase-locked loop, a detector, and a lock determiner. The input buffer may receive a reference signal to generate a first signal, a second signal and a third signal, and the phase delay of the second signal is greater than the first signal and less than the third signal. The locking determiner can start the detector with a start signal after detecting that the charge pump phase locked loop locks the phase difference between the feedback signal and the second signal. The detector performs a sampling process on the feedback signal based on the first signal and the third signal, and outputs an adjustment signal to the charge pump phase-locked loop according to the sampling result to adjust the phase of the feedback signal to between the first signal and the third signal. .

Description

technical field [0001] The invention relates to a phase-locked loop with a current compensation mechanism, in particular to a phase-locked loop that can fine-tune the phase of the feedback signal after the phase difference between the reference signal of the phase-locked loop and the feedback signal is locked, so as to further reduce the A phase-locked loop for the phase difference between the reference signal and the feedback signal. Background technique [0002] Phase Locked Loop (Phase Locked Loop, PLL) is a very common circuit nowadays, which is widely used in electronics, communications and other fields. The main function of the PLL is to make the phase of the input reference signal and the output clock signal The difference can be maintained within a fixed range, thereby achieving the effect of locking the phase difference between the input reference signal and the output clock signal. However, due to the improvement of manufacturing process technology, the problems f...

AI Technical Summary

Problems solved by technology

[0008] In view of the above-mentioned problems in the prior art, one of the objects of the present invention is to provide a phase-locked loop with a current compensation mechanism to solve the phase-locked loop caused by the mismatch of the manufacturing process or other reasons in the prior art. The phase difference between the output signal of the loop and the reference signal is too large

Images