Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and apparatus for redundancy word line replacement in a repairable semiconductor memory device










Image Number 10 for United States Patent #5963489.

A method and apparatus for repairing a semiconductor memory device. A row redundancy replacement arrangement is provided to repair the memory device consisting of a first plurality of redundant true word lines and a second plurality of redundant complement word lines to simultaneously replace the same first number of first normal word lines and the same second number of the normal complement word lines. An address reordering scheme, preferably implemented as a word line selector circuit and controlled by redundancy control logic and address inputs, allows the redundant true (complement) word lines to replace the normal true (complement) word lines when making the repair. The redundancy replacement arrangement ensures that consistency of the bit map is maintained at all times, irrespective whether the memory device operates in a normal or in a redundancy mode. This approach introduces an added flexibility of incorporating the redundancy replacement without affecting the column access speed.








 
 
  Recently Added Patents
Measurement protocol for a medical technology apparatus
Optimized control of an energy supplying system and an energy consuming system
Organic electroluminescent element
(4950
Electronic component, a semiconductor wafer and a method for producing an electronic component
Precoding codebooks for MIMO communication systems
Multi-band dipole antenna
  Randomly Featured Patents
Phenyl isothiocyanate derivatives and their production
Quick release/eject drive assembly
Method for controlling boric acid particle size distribution
Method and means for facilitating material handling
Interlocking floor brick for non-recovery coke oven
Method and IC driver for series connected R, G, B LEDs
Pharmaceutical composition of complex carbohydrates and essential oils and methods of using the same
Scanning an inkjet test pattern for different calibration adjustments
Standing case for personal digital assistant
Dual baffle system in automatic air inlets for livestock facilities