Static information storage and retrieval – Powering – Data preservation
Patent
1984-06-06
1987-06-09
Fears, Terrell W.
Static information storage and retrieval
Powering
Data preservation
365230, G11C 1140
Patent
active
046725865
ABSTRACT:
A semiconductor memory using a dynamic memory device, wherein a battery supplies a power source voltage and a substrate bias voltage when the memory is cut off from an external device, and a refresh control circuit changes in refresh timing of the memory device in accordance with the leakage current of the memory device. The power consumption of the memory can thus be reduced and the data can be kept for an extended period without an external power source.
REFERENCES:
patent: 3859638 (1975-01-01), Hume, Jr.
patent: 4492876 (1985-01-01), Colbert et al.
patent: 4539660 (1985-09-01), Miyauchi et al.
Kubo Masaharu
Masuhara Toshiaki
Minato Osamu
Miyauchi Katsuki
Shimohigashi Katsuhiro
Fears Terrell W.
Hitachi , Ltd.
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