Semiconductor memory having circuit effecting refresh on variabl

Details Semiconductor memory having circuit effecting refresh on variabl Semiconductor memory having circuit effecting refresh on variabl

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.

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