Clock signal regeneration method and apparatus

Details Clock signal regeneration method and apparatus Clock signal regeneration method and apparatus

1994-12-22

1996-08-13

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Regenerating or restoring rectangular or pulse waveform

327141, 327156, H03L 700, H03K 5153

Patent

active

055460321

ABSTRACT:
A clock signal regeneration method and apparatus by which the phase of a regenerated clock signal can be controlled with a step smaller than the width of one clock of a controlling clock signal to improve the accuracy in rate of the regenerated clock signal is disclosed. The apparatus comprises a timing extraction circuit for extracting, from the received data, a timing signal corresponding to a rate of the received data, a phase comparator for comparing the phases of the timing signal and a regenerated clock signal to produce a phase difference signal, an integrator for repetitively adding the phase difference signal at each clock of the regenerated clock signal in a cycle of a controlling clock signal whose frequency is higher than that of the timing signal to produce a phase difference integrated value for each of such adding operation, a sine wave regenerating ROM for converting the phase difference integrated value into amplitude information by which an amplitude of a sine waveform is represented in a digital value, a D/A converter for converting the amplitude information into an analog signal, and a comparator for comparing the analog signal with a reference voltage to produce a new regenerated clock signal.

REFERENCES:
patent: 3824498 (1974-07-01), McBride
patent: 4352999 (1982-10-01), Galpin
patent: 4484296 (1984-11-01), Treise et al.
patent: 4694196 (1987-09-01), Hasley et al.
patent: 4891598 (1990-01-01), Yoshida et al.
patent: 4929849 (1990-05-01), Paul
patent: 5220220 (1993-06-01), Tse et al.
patent: 5282223 (1994-01-01), Muramatsu
patent: 5339303 (1994-08-01), Yoshimaru
patent: 5397945 (1995-03-01), Shum et al.
patent: 5408687 (1995-04-01), Ooga
patent: 5436583 (1995-07-01), Fujii et al.

Affiliated with

Also associated with

Rating

Clock signal regeneration method and apparatus 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 signal regeneration method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clock signal regeneration method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1051169