Resources Contact Us Home
Semiconductor memory having self correction function

Image Number 10 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
Light fitting
Evolutionary clustering algorithm
Systems and/or methods for determining item serial number structure and intelligence
Information display device and program storing medium
Geographically self-labeling access points
Image processing device, image forming apparatus, and non-transitory computer readable recording medium
  Randomly Featured Patents
Belt having embedded wires interlaced across lengthwise surfaces of shafts
Polymeric membranes functionalized with polyhydroxypyridinone ligands
Compounds useful as antiproliferative agents and garft inhibitors
Specimen collection container having a label
Device for adjusting conveyors for flat products in rotary presses
Apparatus for testing reliability of interconnection in integrated circuit
Semiconductor device having increased gaps between gates
Moving toy
Fabric and method of manufacture using selvage bands
Steam iron power stand