Non-volatile RAM transferring data between ferro-electric capaci

Details Non-volatile RAM transferring data between ferro-electric capaci Non-volatile RAM transferring data between ferro-electric capaci

1994-07-05

1996-02-27

Zarabian, A.

Static information storage and retrieval

Systems using particular element

Ferroelectric

365149, 365156, G11C 1122

Patent

active

054954371

ABSTRACT:
A non-volatile RAM circuit (10) uses ferro-electric capacitors (14, 16) to store data in a dormant state. Data is initially stored on the ferro-electric capacitors. The data stored on the ferro-electric capacitors is transferred to a memory cell (25) when the RAM circuit is powered up. Subsequent read operations after the power-up sequence obtain data from the memory cell instead of the ferro-electric capacitors. Any write operation during the power-up sequence is stored in the memory cell. When power is removed, the ferro-electric capacitors are updated with the present state of the memory cell. The endurance and data retention time of the ferro-electic capacitors increases by accessing data from the memory cell.

REFERENCES:
patent: 4974204 (1990-11-01), Miller
patent: 5198706 (1993-03-01), Papaliolios
patent: 5218566 (1993-06-01), Papaliolios

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