PLL device with leakage current compensation unit

Details PLL device with leakage current compensation unit PLL device with leakage current compensation unit

2006-07-10

2010-06-22

Payne, David C (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

Reexamination Certificate

active

07742554

ABSTRACT:
The invention provides a PLL device comprising a PFD unit, a charging pump circuit, a loop filter, an oscillator, a feedback divider and a current compensation circuit. The PFD unit measures a phase and a frequency difference between a reference clock signal and a feedback clock signal of the PLL device to output a difference signal UP and a difference signal DN. The charging pump circuit receives and transfers the difference signals UP and DN into a current. The loop filter receives and transfers the current into a voltage. The oscillator receives the voltage and outputs an output signal. The feedback divider having a parameter N receives the output signal to generate the feedback clock signal according to the parameter N, wherein a frequency of the feedback clock signal is N times a frequency of the output signal. When the reference clock signal leads the feedback clock signal, the current compensation circuit outputs a compensation current to the loop filter.

REFERENCES:
patent: 5892380 (1999-04-01), Quist
patent: 6570947 (2003-05-01), Zipper et al.
patent: 2005/0168292 (2005-08-01), Frans et al.

Affiliated with

Also associated with

Rating

PLL device with leakage current compensation unit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with PLL device with leakage current compensation unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and PLL device with leakage current compensation unit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4244574