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
Head shield
Instance management of code in a database
Method for dropping packet data, radio communication device, and mobile communication system
Semiconductor device and manufacturing method thereof
Resistor-2 resistor (R-2R) digital-to-analog converter with resistor network reversal
Soliciting first party in communication session to maintain call when degradation of connection to second party is anticipated
Monitoring of undesirable fluid ingress into subsea control modules
  Randomly Featured Patents
Lubricating oil
Ultra-flat pressure plate material tester and method for its manufacture
Repeater with low spurious time outputs
N-substituted azaheterocyclic carboxylic acids and their use
Injection device for a liquid medicament
Car washing apparatus with long shallow angle side brush
Methods of treating lung disease by an aerosol containing benzamil or phenamil
Methods and apparatus for treating fibrillation and creating defibrillation waveforms
Distribution of cooling air in switchgear cubicles
Portable radio frequency identification device reader