Static information storage and retrieval – Read/write circuit – Signals
Patent
1999-06-11
2000-06-13
Nelms, David
Static information storage and retrieval
Read/write circuit
Signals
36523009, 36523006, 36518901, G11C 700
Patent
active
060757310
ABSTRACT:
A first sense amplifier reads from a first memory cell array at a normal equilibrium point between a read-"0" operation and a read-"1" operation. A second sense amplifier detects data dissipation by reading data at an equilibrium point higher than the normal equilibrium point, from a second memory cell array provided for detection of data dissipation and having the same characteristic as the first memory cell array. An interrupt control circuit issues an interrupt request to a CPU so as to stop its operation. Subsequently, in response to an instruction from a memory overwrite control circuit, a write/read/erasure control circuit overwrites data stored in the first memory cell array.
REFERENCES:
patent: 5276856 (1994-01-01), Norsworthy et al.
patent: 5764591 (1998-06-01), Matsui et al.
patent: 5901103 (1999-05-01), Harris, II et al.
Hamakawa Akira
Sugita Kazuya
Le Thong
Mitsubishi Denki & Kabushiki Kaisha
Nelms David
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