Resources Contact Us Home
Reducing programming voltage differential nonlinearity in non-volatile storage

Image Number 16 for United States Patent #7577034.

A corrective action is taken to adjust for nonlinearities in a program voltage which is applied to a selected word line in a memory device. The nonlinearities result in a non-uniform program voltage step size which can cause over programming or slow programming. A digital to analog converter (DAC) which provides the program voltages can have a nonlinear output, such as when certain code words are input to the DAC. The memory device can be tested beforehand to determine where the nonlinearities occur, and configured to take corrective action when the corresponding code words are input. For example, the DAC may have a nonlinear output when a rollover code word is input, e.g., a when a string of least significant bits in successive code words change from 1's to 0's. The corrective action can include repeating a prior program pulse or adjusting a duration of a program pulse.

  Recently Added Patents
Bioactive agent-loaded heart-targeting nanoparticles
Electrical event detection device and method of detecting and classifying electrical power usage
Print control server, print controlling method, and print control program
Methods and devices for creating, compressing and searching binary tree
Signal activated molecular delivery
Compositions and methods for activating innate and allergic immunity
  Randomly Featured Patents
Composition for controlled release of an active substance and method for the preparation of such a composition
Method for in-place, lightweight Ack promotion in a wireless network environment
Process for the preparation of diaminoresorcinol
Base station for a radio communication with a radio terminal
Voltage-current converter
Adaptive authentication solution that rewards almost correct passwords and that simulates access for incorrect passwords
Method of using an insulator spacer to form a narrow base width lateral bipolar junction transistor
Frame assembly and composite inclusive thereof
Drill bit with dispersed cutter inserts
Method of and apparatus for injection molding of injection molded parts containing imbedded inserts