Non-volatile counting method and apparatus

Details Non-volatile counting method and apparatus Non-volatile counting method and apparatus

1990-11-30

1993-01-19

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Including memory

377 241, H03K 2140

Patent

active

051812312

ABSTRACT:
A non-volatile counter memory is provided by using a gray code scale to store counter values in a plurality of counter memories (34) comprising a counter memory group (38). Each counter memory comprises a plurality of units which store a gray coded value. The weighting of the units is changed after a predetermined number of write operations such that the number of bit transitions is spread out among the units.

REFERENCES:
patent: 4663770 (1987-05-01), Murray et al.
patent: 4757522 (1988-07-01), Kieselstein
patent: 4803707 (1989-02-01), Cordan, Jr.
patent: 4839909 (1989-06-01), Warner
patent: 4860228 (1989-08-01), Carroll
patent: 4947410 (1990-07-01), Lippmann et al.

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