Electrical computers and digital processing systems: support – Clock – pulse – or timing signal generation or analysis – Multiple or variable intervals or frequencies
Reexamination Certificate
2008-01-01
2008-01-01
Lee, Thomas (Department: 2115)
Electrical computers and digital processing systems: support
Clock, pulse, or timing signal generation or analysis
Multiple or variable intervals or frequencies
C713S500000, C713S502000
Reexamination Certificate
active
07315957
ABSTRACT:
Methods, circuits, and apparatus for changing a frequency of a clock signal provided to a graphics memory while reducing any resulting visual glitch or disturbance on a monitor. A specific embodiment provides multiple clock sources that may be multiplexed or selected to provide a memory clock signal to the graphics memory. The multiplexer switches from providing a first clock source signal as the memory clock signal to providing a second clock source signal as the memory clock signal. The first clock source changes its frequency of operation. After the first clock source settles or stabilizes, the multiplexer switches back to providing the first clock source signal as the memory clock signal.
REFERENCES:
patent: 4203107 (1980-05-01), Lovercheck
patent: 4542376 (1985-09-01), Bass et al.
patent: 5615376 (1997-03-01), Ranganathan
patent: 5619707 (1997-04-01), Suboh
patent: 6341355 (2002-01-01), Rutherford et al.
patent: 6476800 (2002-11-01), Millman et al.
patent: 6529083 (2003-03-01), Fujita
patent: 6678834 (2004-01-01), Aihara et al.
patent: 6750687 (2004-06-01), Klecka, III
patent: 6870531 (2005-03-01), Lee et al.
patent: 2005/0053179 (2005-03-01), Knapp et al.
Alben Jonah M.
Gupta Saurabh
Irwin Jeffrey J.
Wagner Barry
Yeoh Sonny
Cribbs Malcolm D
Lee Thomas
Nvidia Corporation
Townsend and Townsend / and Crew LLP
Zigmant J. Matthew
LandOfFree
Method of providing a second clock while changing a first... 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 of providing a second clock while changing a first..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of providing a second clock while changing a first... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2772914