Resources Contact Us Home
Write-leveling implementation in programmable logic devices

Image Number 7 for United States Patent #8122275.

Circuits, methods, and apparatus for memory interfaces that compensate for skew between a clock signal and DQ/DQS signals that may be caused by a fly-by routing topology. The skew is compensated by clocking the DQ/DQS signals with a phase delayed clock signal, where the phase delay has been calibrated. In one example calibration routine, a clock signal is provided to a receiving device. A DQ/DQS signal is also provided and the timing of their reception compared. A delay of the DQ/DQS signal is changed incrementally until the DQ/DQS signal is aligned with the clock signal at the receiving device. This delay is then used during device operation to delay a signal that clocks registers providing the DQ/DQS signals. Each DQ/DQS group can be aligned to the clock, or the DQS and DQ signals in a group may be independently aligned to the clock at the receiving device.

  Recently Added Patents
Vacuum switch and electrode assembly therefor
Systems, methods, and apparatus to determine physical location and routing within a field of low power beacons
Magnesium metal-air battery
Parallel processing computer systems with reduced power consumption and methods for providing the same
Backside structure and methods for BSI image sensors
Dynamically updating privacy settings in a social network
System and method for deriving cell global identity information
  Randomly Featured Patents
Process for the transfer of aseptic products between two enclosures and transportation container for performing this process
Spread spectrum clock generator
Modified polysaccharide supports
Roller exterior layer comprising polymer, carbon black and soluble ionic salt
Stuffed toy store
Endoscopic end effectors constructed from a combination of conductive and non-conductive materials and useful for selective endoscopic cautery
Apparatus and method for lubricating apron chains on roll baling machines
Snapshot backscatter radiography system and protocol
Safety deposit box system
Optical disc having a protective layer which is thicker at its outer periphery