Digitally controlled circuit for reducing the phase...

Details Digitally controlled circuit for reducing the phase... Digitally controlled circuit for reducing the phase...

2005-04-05

2005-04-05

Liu, Shuwang (Department: 2634)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C375S376000, C375S371000, C375S149000, C375S372000, C332S103000, C332S127000

Reexamination Certificate

active

06876710

ABSTRACT:
A digitally controlled circuit for reducing the phase modulation of a signal. The circuit has a multiphase clock generator that produces n phases of a clock that is m-times the signal. The circuit further has a multiplexer with n inputs for the n phases of the clock and with one output which supplies the output signal. The output signal and the signal are connected to the inputs of a phase comparator. The output signal of the comparator is supplied to a sigma-delta modulator whose output signals are used for controlling the multiplexer. A jittered input signal is compared in the phase comparator with a master clock. The determined phase difference is integrated in a sigma-delta modulator. The aim of the circuit is to generate a clock without jitter, digitally and without using external components. This circuit provides 20 dB/decade attenuation of the jitter received in the SYNC signal, based on the P-regulator characteristic.

REFERENCES:
patent: 5493243 (1996-02-01), Ghoshal
patent: 5502750 (1996-03-01), Co et al.
patent: 5534827 (1996-07-01), Yamaji
patent: 5602882 (1997-02-01), Co et al.
patent: 5834987 (1998-11-01), Dent
patent: 39 42 883 (1991-06-01), None
patent: 0 692 878 (1996-01-01), None
Published International Application No. WO 96/28889 (Wilson et al.), dated Sep. 19, 1996.

Affiliated with

Also associated with

Rating

Digitally controlled circuit for reducing the phase... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digitally controlled circuit for reducing the phase..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digitally controlled circuit for reducing the phase... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3442184