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










Image Number 14 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
Rate controlled first in first out (FIFO) queues for clock domain crossing
Wireless enclosure
Methods and systems for providing a business repository
Method and apparatus for reacquiring lines in a cache
Image forming apparatus
Radiation detector array
Configurable caged ball insert for a downhole tool
  Randomly Featured Patents
Dual optical amplifier ring laser gyroscope with reduced phase locking
Image display device
Method for manufacturing a coiler drum and a coiler drum
Articulated fin/wing control system
Method and apparatus for providing traffic information using schedule registration information
Method for manufacturing a semiconductor device using an Al-Zn connecting material
Locking device for handle assembly with multiple stages
Profiled rail and method for producing a profiled rail
System and method for transferring compressed three-dimensional graphics data
Earthquake alarm assembly