Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
High-speed comparator with asymmetric frequency response
Method for configuring analog-to-digital converter keys and non-transitory machine readable medium storing program code executed for performing such method
Use of physical deformation during scanning of an object to generate views of the object
Device for producing a connection grid with an integrated fuse
Signal transfer apparatus
Hydrogenolysis of ethyl acetate in alcohol separation processes
Apparatus for touch screen avionic device
  Randomly Featured Patents
Sheet-like insulation
Optical junction apparatus and methods employing optical power transverse-transfer
Novel gel electrophoresis cell having a lower buffer chamber with perforated shoulder for holding gel tubes or channels
Wiper/bend die combination
Storage node, phase change memory device and methods of operating and fabricating the same
Plant proteins
Apparatus for projecting a light beam through a transparent structure
Air initiation for detergent range pendant or internal olefin sulfitation
Diagnostic composition containing an LH-RH antagonist for hysteroscopy
Sliding door and window locking device