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










Image Number 18 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
String changing tool with a quick connector assembly and worm gear string cutter
Methods and systems to reduce a number of simulations in a timing analysis
Storage device performance alignment notification
Data driver and liquid crystal display device using the same
Quantitative oxygen imaging systems and methods using echo-based single point imaging
Software self-checking systems and methods
Power device and method of packaging same
  Randomly Featured Patents
Modular roasting pan having a jointer
Removable heat sink for xenon arc lamp packages
Capacitor device and wiring pattern
Generation of highly uniform magnetic fields with magnetized wedges
Catheter cover
Earth ground terminal
Indicator
Fiber optic closure with couplers and splice tray
Dynamic balancing machine using EDM
Hand-held aerodynamic umbrella