Compact electronic apparatus with a refresh unit for a dynamic t

Details Compact electronic apparatus with a refresh unit for a dynamic t Compact electronic apparatus with a refresh unit for a dynamic t

1988-04-14

1989-11-14

Gossage, Glenn A.

Static information storage and retrieval

Read/write circuit

Data refresh

365227, 365233, 365 45, 364707, 379 88, G11C 700, G11C 800, G06F 100

Patent

active

048812056

ABSTRACT:
A compact electronic apparatus employs a dynamic type memory, e.g., a dynamic random access memory (DRAM), a crystal oscillator circuit for generating a high frequency signal, and a resistor/capacitor (RC) circuit for generating a low frequency signal. When the apparatus is operated, the high frequency signal is used for accessing the data stored in the DRAM. When operation of the apparatus is interrupted, the DRAM is refreshed by the low frequency signal thus reducing the entire power consumption of the apparatus, since the power consumption of the RC oscillator circuit is lower than that of the crystal oscillator circuit.

REFERENCES:
patent: 3922526 (1975-11-01), Cochran
patent: 4005395 (1977-01-01), Fosler, Jr. et al.
patent: 4217637 (1980-08-01), Faulkner et al.
patent: 4317181 (1982-02-01), Teza et al.
patent: 4556952 (1985-12-01), Brewer et al.
patent: 4682328 (1987-07-01), Ramsay et al.
patent: 4686386 (1987-08-01), Tadao
patent: 4717261 (1988-01-01), Kita et al.

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