Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Semiconductor memory having self correction function










Image Number 12 for United States Patent #4747080.

A semiconductor memory having a self correction function, includes: a plurality of memory cells which are divided into a plurality of area groups, store data, and are arranged in a matrix; a plurality of parity cells, associated with the area groups of the memory cells, for forming horizontal and vertical parity codes together with the data in the memory cells of the respective area groups; word lines for simultaneously selecting the plurality of memory cells and the parity cells; bit lines for exchanging data with the memory cells; parity bit lines for exchanging parity bit data with the parity cells; selectors for selecting data of the memory cells and data of the parity cell in the area group to which a memory cell to be checked belongs; means for performing parity check of a plurality of data from the selectors; and means for automatically correcting a bit error using the output from the parity check means. The memory cells divided into the area groups and the parity cells combined therewith are arranged so as not to belong to the same horizontal and vertical arrays of the matrix.








 
 
  Recently Added Patents
Method of sending CTI messages in a communication system
Piperazinedione compounds
Enhanced telephony services
Systems and methods for selective text to speech synthesis
Methods and apparatus for clock signal synchronization in a configuration of series connected semiconductor devices
Level shifter and method of using the same
Physiological measuring system comprising a garment in the form of a sleeve or glove and sensing apparatus incorporated in the garment
  Randomly Featured Patents
Aircraft with transient-discriminating propeller balancing system
Process for the preparation of tertiary amines from primary amines and nitriles
Working vehicle with traversing system
Fc.epsilon.-PE chimeric protein for targeted treatment of allergy responses a method for its production and pharmaceutical compositions containing the same
Universal exercise device
Alternate firing method
Planar coil construction
Vehicle mounted electrical component
Multiple-screw extruder
Separating apparatus for a cleaning appliance