Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Patent
1997-02-24
1998-08-18
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
348537, 348512, 345501, G09G 512
Patent
active
057963924
ABSTRACT:
A clock recovery circuit in a digital display unit for recovering a time reference signal associated with analog display data. The clock recovery circuit includes a phase-locked loop (PLL) implemented in digital domain and an analog filter to eliminate any undesirable frequencies from the output signal of the PLL. The PLL includes independent control loops to track long term frequency drifts of the time reference signal and the transient phase differences respectively. By providing such independent control loops, the generated clock can be better synchronized with the time reference signal.
REFERENCES:
patent: 4018990 (1977-04-01), Long et al.
patent: 4346407 (1982-08-01), Baer et al.
patent: 4488170 (1984-12-01), Nillesen
patent: 4527145 (1985-07-01), Haussmann et al.
patent: 4554582 (1985-11-01), Wine
patent: 4616259 (1986-10-01), Moran et al.
patent: 4686560 (1987-08-01), Balaban et al.
patent: 4694327 (1987-09-01), Demmer et al.
patent: 4700217 (1987-10-01), Balaban et al.
patent: 4703340 (1987-10-01), Balaban et al.
patent: 4802009 (1989-01-01), Hartmeier
patent: 4893319 (1990-01-01), Ziuchkovski
patent: 5005079 (1991-04-01), Satomi
patent: 5010403 (1991-04-01), Wardzala
patent: 5086295 (1992-02-01), Boettcher et al.
patent: 5101197 (1992-03-01), Hix et al.
patent: 5185603 (1993-02-01), Medin
patent: 5202669 (1993-04-01), Ishimochi et al.
patent: 5280345 (1994-01-01), Uehara et al.
patent: 5335018 (1994-08-01), Mohlmann et al.
patent: 5359366 (1994-10-01), Ubukata et al.
patent: 5459766 (1995-10-01), Huizer et al.
patent: 5497202 (1996-03-01), Kim
patent: 5515108 (1996-05-01), Kim
patent: 5539473 (1996-07-01), Kommurusch et al.
patent: 5574406 (1996-11-01), Sauer et al.
patent: 5621767 (1997-04-01), Brandt et al.
patent: 5623311 (1997-04-01), Phillips et al.
Hjerpe Richard A.
Lao Lun-Yi
Paradise Electronics, Inc.
LandOfFree
Method and apparatus for clock recovery in a digital display uni does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for clock recovery in a digital display uni, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for clock recovery in a digital display uni will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1118866