Back to results
US 4,290,117 AGranted
Memory device with circulating storage loops
AssigneeHitachi, Ltd.
InventorsMamoru Sugie, Noboru Yamaguchi, Koichi Mayama, Yuzo Kita, Shigeru Yoshizawa, Nobuo Saito, Atsushi Asano
Life of this patent
Estimating the term…
Abstract
In a memory device which has a plurality of recirculating type storage loops and in which information of the same addresses of the respective storage loops can be read and written in parallel, a memory device wherein information representing whether or not the corresponding storage loop is a bad or defective loop is written in a specified address of each of the storage loops.
Claims8
A memory device comprising:
- storage means having a plurality of information storage loops, in each of which information representing whether or not the corresponding storage loop is a defective loop is written in a predetermined address of the corresponding storage loop;
- and
- at least one marker storage loop in which a specific marker is written in a specified address corresponding to the predetermined address of said information storage loop;
- and
- control means for reading and writing information of the same addresses of the respective storage loop of said storage means in parallel.
2 more elements
Dependencies are inferred from the claim text.