Clock synchronizing circuitry having a fast tuning circuit

Details Clock synchronizing circuitry having a fast tuning circuit Clock synchronizing circuitry having a fast tuning circuit

1995-06-28

1996-07-16

Chin, Stephen

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

331 16, 327141, 327155, H03D 324

Patent

active

055374492

ABSTRACT:
Clock synchronizing circuitry with a fast tuning circuit has a differentiator for detecting the advanced/delayed state of the phase of an input clock signal and that of an output clock signal. A control amount is changed on the basis of the transition points of the detected phases. Only fast tuning control is executed with usual tuning control masked. Every time a transition point is detected, a selector halves the amount of control. After the control amount has reached .+-.1, the fast tuning control is ended on the detection of the next transition point. Because this kind of control involves a difference between frequency tuning and phase tuning, an integrator calculates a correction amount. One half each control amount is added in the opposite polarity as a correction amount. As a result, fast clock synchronization is achieved.

REFERENCES:
patent: 4215430 (1980-07-01), Johnson, Jr.
patent: 4376268 (1983-03-01), Moriya et al.
patent: 5375148 (1994-12-01), Parker et al.
patent: 5469478 (1995-11-01), Lee

Affiliated with

Also associated with

Rating

Clock synchronizing circuitry having a fast tuning circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Clock synchronizing circuitry having a fast tuning circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clock synchronizing circuitry having a fast tuning circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1790952